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Science Olympiad
| Question | Answer |
|---|---|
| What is the chemical formula for water? A) H₂O B) CO₂ C) O₂ D) H₂ | A) H₂O |
| What planet is known as the Red Planet? A) Venus B) Mars C) Jupiter D) Saturn | B) Mars |
| What is the powerhouse of the cell? A) Nucleus B) Ribosome C) Mitochondria D) Chloroplast | C) Mitochondria |
| What is the speed of light in a vacuum? A) 300,000 km/s B) 150,000 km/s C) 299,792 km/s D) 250,000 km/s | C) 299,792 km/s |
| What gas do plants absorb from the atmosphere during photosynthesis? A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen | C) Carbon dioxide |
| What is the most abundant gas in the Earth's atmosphere? A) Oxygen B) Nitrogen C) Carbon dioxide D) Argon | B) Nitrogen |
| What is the process by which plants make their food using sunlight? A) Respiration B) Photosynthesis C) Transpiration D) Fermentation | B) Photosynthesis |
| What is the hardest natural substance on Earth? A) Gold B) Iron C) Diamond D) Quartz | C) Diamond |
| What is the chemical symbol for gold? A) Ag B) Au C) Gd D) Go | B) Au |
| What is the main gas found in the air we breathe? A) Oxygen B) Carbon dioxide C) Nitrogen D) Helium | C) Nitrogen |
| What is the boiling point of water at sea level? A) 90°C B) 100°C C) 110°C D) 120°C | B) 100°C |
| What is the largest planet in our solar system? A) Earth B) Mars C) Jupiter D) Saturn | C) Jupiter |
| What is the basic unit of life? A) Atom B) Molecule C) Cell D) Tissue | C) Cell |
| What is the chemical formula for table salt? A) NaCl B) KCl C) CaCl₂ D) MgCl₂ | A) NaCl |
| What force keeps us grounded on Earth? A) Magnetism B) Gravity C) Friction D) Inertia | B) Gravity |
| What is the primary source of energy for the Earth? A) The Moon B) The Sun C) The Stars D) The Oceans | B) The Sun |
| What is the process by which a liquid changes into a gas? A) Condensation B) Evaporation C) Sublimation D) Precipitation | B) Evaporation |
| What is the smallest particle of an element that retains the properties of that element? A) Molecule B) Atom C) Electron D) Proton | B) Atom |
| What is the term for animals that eat only plants? A) Carnivores B) Herbivores C) Omnivores D) Detritivores | B) Herbivores |
| What is the name of the galaxy that contains our Solar System? A) Andromeda B) Milky Way C) Triangulum D) Whirlpool | B) Milky Way |
| What is the chemical formula for methane? A) CH₄ B) CO₂ C) C₂H₆ D) C₃H₈ | A) CH₄ |
| Which planet is known as the Earth's twin? A) Mars B) Venus C) Jupiter D) Saturn | B) Venus |
| What is the main function of red blood cells? A) Fight infections B) Carry oxygen C) Clot blood D) Produce hormones | B) Carry oxygen |
| What is the unit of electrical resistance? A) Volt B) Ampere C) Ohm D) Watt | C) Ohm |
| What is the process by which plants lose water vapor through their leaves? A) Transpiration B) Respiration C) Photosynthesis D) Fermentation | A) Transpiration |
| What is the most common element in the universe? A) Oxygen B) Carbon C) Hydrogen D) Nitrogen | C) Hydrogen |
| What is the chemical symbol for sodium? A) S B) Na C) So D) N | B) Na |
| What is the term for a change in a species over time? A) Evolution B) Mutation C) Adaptation D) Natural selection | A) Evolution |
| What is the largest organ in the human body? A) Heart B) Liver C) Skin D) Lungs | C) Skin |
| What is the primary gas found in the Earth's stratosphere that absorbs ultraviolet radiation? A) Carbon dioxide B) Methane C) Ozone D) Nitrogen | C) Ozone |
| What is the chemical formula for glucose? A) C₆H₁₂O₆ B) C₆H₆O₆ C) C₁₂H₂₂O₁₁ D) C₆H₁₂O₅ | A) C₆H₁₂O₆ |
| Which planet has the most moons? A) Earth B) Mars C) Jupiter D) Saturn | D) Saturn |
| What is the main function of white blood cells? A) Carry oxygen B) Fight infections C) Clot blood D) Produce hormones | B) Fight infections |
| What is the unit of frequency? A) Hertz B) Joule C) Newton D) Pascal | A) Hertz |
| What is the process by which a solid changes directly into a gas? A) Evaporation B) Condensation C) Sublimation D) Deposition | C) Sublimation |
| What is the most abundant metal in the Earth's crust? A) Iron B) Aluminum C) Calcium D) Magnesium | B) Aluminum |
| What is the chemical symbol for potassium? A) P B) K C) Po D) Pt | B) K |
| What is the term for the movement of water across a semipermeable membrane? A) Diffusion B) Osmosis C) Active transport D) Filtration | B) Osmosis |
| What is the largest bone in the human body? A) Femur B) Tibia C) Humerus D) Radius | A) Femur |
| What is the primary gas found in the Earth's troposphere that is essential for respiration? A) Carbon dioxide B) Methane C) Oxygen D) Nitrogen | C) Oxygen |
| What is the chemical formula for carbon dioxide? A) CO B) CO₂ C) C₂O D) C₂O₂ | B) CO₂ |
| Which planet is closest to the Sun? A) Venus B) Earth C) Mercury D) Mars | C) Mercury |
| What is the main function of the roots of a plant? A) Photosynthesis B) Absorb water and nutrients C) Produce flowers D) Support the stem | B) Absorb water and nutrients |
| What is the unit of force? A) Joule B) Newton C) Watt D) Pascal | B) Newton |
| What is the process by which plants release oxygen into the atmosphere? A) Respiration B) Photosynthesis C) Transpiration D) Fermentation | B) Photosynthesis |
| What is the most abundant element in the Earth's crust? A) Oxygen B) Silicon C) Aluminum D) Iron | A) Oxygen |
| What is the chemical symbol for calcium? A) Ca B) C C) Cl D) Cu | A) Ca |
| What is the term for the variety of life in an ecosystem? A) Biodiversity B) Ecology C) Evolution D) Adaptation | A) Biodiversity |
| What is the primary gas found in the Earth's atmosphere that is essential for respiration? A) Carbon dioxide B) Methane C) Oxygen D) Nitrogen | C) Oxygen |
| What is the chemical formula for sulfuric acid? A) HCl B) H₂SO₄ C) HNO₃ D) H₂CO₃ | B) H₂SO₄ |
| Which planet has the shortest day in our solar system? A) Earth B) Jupiter C) Mars D) Venu | B) Jupiter |
| What is the main function of the chloroplast in plant cells? A) Store nutrients B) Produce energy C) Conduct photosynthesis D) Provide structural support | C) Conduct photosynthesis |
| What is the unit of pressure? A) Pascal B) Newton C) Joule D) Watt | A) Pascal |
| What is the process by which a gas changes into a liquid? A) Evaporation B) Condensation C) Sublimation D) Deposition | B) Condensation |
| What is the most abundant element in the human body? A) Carbon B) Hydrogen C) Oxygen D) Nitrogen | C) Oxygen |
| What is the chemical symbol for iron? A) Fe B) Ir C) In D) I | A) Fe |
| What is the term for the study of weather? A) Geology B) Meteorology C) Astronomy D) Hydrology | B) Meteorology |
| What is the largest internal organ in the human body? A) Heart B) Liver C) Lungs D) Kidneys | B) Liver |
| What is the primary gas found in the Earth's atmosphere that is essential for photosynthesis? A) Carbon dioxide B) Methane C) Oxygen D) Nitroge | A) Carbon dioxide |
| What is the chemical formula for ammonia? A) NH₃ B) NO₂ C) N₂O D) NH₄ | A) NH₃ |
| Which planet is known for its prominent ring system? A) Jupiter B) Saturn C) Uranus D) Neptune | B) Saturn |
| What is the main function of the xylem in plants? A) Transport water and nutrients B) Transport food C) Store energy D) Support the plant | A) Transport water and nutrients |
| What is the unit of energy? A) Newton B) Joule C) Watt D) Pascal | B) Joule |
| What is the process by which a liquid changes into a solid? A) Evaporation B) Condensation C) Freezing D) Sublimation | C) Freezing |
| What is the most abundant gas in the Earth's atmosphere? A) Oxygen B) Nitrogen C) Carbon dioxide D) Argon | B) Nitrogen |
| What is the chemical symbol for magnesium? A) Mg B) Mn C) Mo D) Ma | A) Mg |
| What is the term for the study of the relationships between organisms and their environment? A) Ecology B) Biology C) Geology D) Chemistry | A) Ecology |
| What is the largest muscle in the human body? A) Biceps B) Quadriceps C) Gluteus maximus D) Trapezius | C) Gluteus maximus |
| What is the primary gas found in the Earth's atmosphere that is essential for combustion? A) Carbon dioxide B) Methane C) Oxygen D) Nitrogen | C) Oxygen |
| Which part of a plant makes food? (a) Roots (b) Stem (c) Leaves (d) Flowers | (c) Leaves |
| Which of these materials is the best conductor of heat? (a) Wood (b) Plastic (c) Metal (d) Fabric | (c) Metal |
| What causes day and night? (a) The Sun orbiting the Earth (b) The Earth orbiting the Sun (c) The Earth spinning on its axis (d) Clouds blocking the Sun | (c) The Earth spinning on its axis |
| What process releases energy from glucose in cells without using oxygen? (a) Photosynthesis (b) Aerobic respiration (c) Anaerobic respiration (d) Transpiration | (c) Anaerobic respiration |
| Which of the following is a base? (a) Lemon juice (b) Vinegar (c) Sodium hydroxide (d) Hydrochloric acid | (c) Sodium hydroxide |
| Which of the following is not a form of energy? (a) Kinetic energy (b) Potential energy (c) Mass (d) Heat | (c) Mass |
| Which blood vessel carries deoxygenated blood from the heart to the lungs? (a) Aorta (b) Pulmonary artery (c) Pulmonary vein (d) Vena cava | (b) Pulmonary artery |
| What is the SI unit of electric current? (a) Volt (b) Ohm (c) Ampere (d) Watt | (c) Ampere |
| What is the chemical formula for water? (a) CO2 (b) H2O (c) NaCl (d) NH3 | (b) H2O |
| Which type of rock is formed from the cooling and solidification of lava or magma? (a) Sedimentary rock (b) Metamorphic rock (c) Igneous rock (d) Fossilized rock | (c) Igneous rock |
| Which of these is a characteristic of living things? (a) Breathing (b) Eating (c) Growing (d) All of the above | (d) All of the above |
| Which state of matter has a definite volume but no definite shape? (a) Solid (b) Liquid (c) Gas (d) Plasma | (b) Liquid |
| What is the main source of light and heat on Earth? (a) The Moon (b) Stars (c) The Sun (d) Fire | (c) The Sun |
| Which organ in the human body produces insulin? (a) Liver (b) Pancreas (c) Kidney (d) Stomach | (b) Pancreas |
| What type of reaction involves the transfer of electrons? (a) Neutralization (b) Precipitation (c) Redox (d) Acid-base | (c) Redox |
| What type of lens is used to correct nearsightedness (myopia)? (a) Convex lens (b) Concave lens (c) Cylindrical lens (d) Bifocal lens | (b) Concave lens |
| What is the function of the vacuole in a plant cell? (a) Protein synthesis (b) Energy production (c) Storage of water and nutrients (d) Cell division | (c) Storage of water and nutrients |
| What is the name of the force that opposes motion between two surfaces in contact? (a) Gravity (b) Friction (c) Magnetism (d) Tension | (b) Friction |
| What is the process by which a solid changes directly into a gas? (a) Melting (b) Boiling (c) Sublimation (d) Condensation | (c) Sublimation |
| Which of the following is a renewable energy source? (a) Coal (b) Oil (c) Natural gas (d) Solar energy | (d) Solar energy |
| What do plants need to make their own food? (a) Sunlight, water, and carbon dioxide (b) Soil, water, and oxygen (c) Sunlight, oxygen, and soil (d) Water, carbon dioxide, and fertilizer | (a) Sunlight, water, and carbon dioxide |
| Which of the following is a mixture? (a) Water (b) Salt (c) Air (d) Iron | (c) Air |
| What is the name of the force that pulls objects towards the Earth? (a) Magnetism (b) Gravity (c) Friction (d) Electricity | (b) Gravity |
| Which of the following is a function of the skeletal system? (a) Pumping blood (b) Protecting organs (c) Digestion (d) Gas exchange | (b) Protecting organs |
| What is the term for a substance that speeds up a chemical reaction without being used up itself? (a) Reactant (b) Product (c) Catalyst (d) Inhibitor | (c) Catalyst |
| What is the relationship between voltage, current, and resistance in a circuit (Ohm's Law)? (a) V = IR (b) V = I/R (c) V = R/I (d) I = VR | (a) V = IR |
| Which part of the digestive system absorbs most of the nutrients from food? (a) Stomach (b) Large intestine (c) Small intestine (d) Esophagus | (c) Small intestine |
| What type of electromagnetic wave is used in microwave ovens? (a) Radio waves (b) Microwaves (c) Infrared waves (d) Ultraviolet waves | (b) Microwaves |
| What is the name for a solution that contains the maximum amount of solute that can be dissolved at a given temperature? (a) Dilute (b) Concentrated (c) Saturated (d) Unsaturated | (c) Saturated |
| What is the name for a large, slow-moving mass of ice? (a) River (b) Glacier (c) Lake (d) Desert | (b) Glacier |
| Which animal group includes mammals, birds, reptiles, amphibians, and fish? (a) Invertebrates (b) Vertebrates (c) Insects (d) Arachnids | (b) Vertebrates |
| Which of these is a renewable source of energy? (a) Coal (b) Petrol (c) Wind (d) Natural Gas | (c) Wind |
| Which of these is closest to Earth? (a) Sun (b) Moon (c) Jupiter (d) Mars | (b) Moon |
| In what part of the cell does cellular respiration primarily occur? (a) Nucleus (b) Ribosome (c) Mitochondria (d) Golgi apparatus | (c) Mitochondria |
| Which gas is commonly used to sterilize drinking water? (a) Oxygen (b) Carbon Dioxide (c) Chlorine (d) Nitrogen | (c) Chlorine |
| If the mass of an object doubles, what happens to its inertia? (a) Decreases by half (b) Remains the same (c) Doubles (d) Quadruples | (c) Doubles |
| What type of plant tissue transports sugars from the leaves to other parts of the plant? (a) Xylem (b) Phloem (c) Epidermis (d) Parenchyma | (b) Phloem |
| What is the angle of incidence when the angle of reflection is 30 degrees? (a) 0 degrees (b) 30 degrees (c) 60 degrees (d) 90 degrees | (b) 30 degrees |
| Which of the following pH values indicates the strongest acid? (a) 5 (b) 7 (c) 9 (d) 1 | (d) 1 |
| Which layer of the atmosphere contains the ozone layer? (a) Troposphere (b) Stratosphere (c) Mesosphere (d) Thermosphere | (b) Stratosphere |
| What is the main function of the roots of a plant? (a) To produce food (b) To absorb water and minerals (c) To attract insects (d) To protect the plant from sunlight | (b) To absorb water and minerals |
| Which of these materials is transparent? (a) Wood (b) Metal (c) Glass (d) Brick | (c) Glass |
| What is the name of the landform that is surrounded by water on three sides? (a) Island (b) Peninsula (c) Lake (d) Mountain | (b) Peninsula |
| Which type of cell division results in daughter cells that are genetically identical to the parent cell? (a) Meiosis (b) Mitosis (c) Fertilization (d) Mutation | (b) Mitosis |
| What is the name of the process by which a liquid changes into a gas? (a) Melting (b) Freezing (c) Evaporation (d) Condensation | (c) Evaporation |
| What is the SI unit of force? (a) Joule (b) Watt (c) Newton (d) Pascal | (c) Newton |
| What is the role of chlorophyll in plants? (a) Absorbing water (b) Absorbing sunlight for photosynthesis (c) Transporting nutrients (d) Protecting the plant from diseases | (b) Absorbing sunlight for photosynthesis |
| Which type of energy is stored in a stretched rubber band? (a) Kinetic energy (b) Potential energy (c) Thermal energy (d) Electrical energy | (b) Potential energy |
| What is the name of the compound formed when an acid reacts with a base? (a) Acid (b) Base (c) Salt (d) Water (or more precisely a salt and water) | (c) Salt |
| Which process contributes to the formation of sedimentary rocks? (a) Volcanic eruption (b) Metamorphism (c) Weathering and erosion (d) Plate tectonics | (c) Weathering and erosion |
| Which of these animals lays eggs? (a) Cat (b) Dog (c) Hen (d) Cow | (c) Hen |
| Which of these is a good insulator of electricity? (a) Copper wire (b) Aluminum foil (c) Rubber (d) Steel | (c) Rubber |
| Which is the hottest planet in the solar system? (a) Mercury (b) Venus (c) Mars (d) Earth | (b) Venus |
| Which gas is released during photosynthesis? (a) Carbon dioxide (b) Nitrogen (c) Oxygen (d) Hydrogen | (c) Oxygen |
| What is the chemical formula for table salt? (a) HCl (b) H2O (c) NaCl (d) NaOH | (c) NaCl |
| What is the property of a body to resist change in its state of rest or motion? (a) Gravity (b) Inertia (c) Momentum (d) Acceleration | (b) Inertia |
| What part of the human eye is responsible for focusing light? (a) Iris (b) Pupil (c) Lens (d) Retina | (c) Lens |
| What is the speed of light in a vacuum? (a) 3 x 10^5 m/s (b) 3 x 10^6 m/s (c) 3 x 10^7 m/s (d) 3 x 10^8 m/s | (d) 3 x 10^8 m/s |
| What type of bond is formed when atoms share electrons? (a) Ionic bond (b) Covalent bond (c) Metallic bond (d) Hydrogen bond | (b) Covalent bond |
| What is the name for the supercontinent that existed millions of years ago? (a) Asia (b) Europe (c) Gondwana (d) Pangaea | (d) Pangaea |
| Which of these helps plants to disperse their seeds? (a) Roots (b) Flowers (c) Wind (d) Stem | (c) Wind |
| Which of these has the least mass? (a) A car (b) An elephant (c) A feather (d) A human | (c) A feather |
| What is the process where water changes from liquid to gas? (a) Melting (b) Freezing (c) Evaporation (d) Condensation | (c) Evaporation |
| What is the main function of red blood cells? (a) Fight infection (b) Carry oxygen (c) Clot blood (d) Digest food | (b) Carry oxygen |
| What is the pH of a neutral solution? (a) 0 (b) 7 (c) 14 (d) 1 | (b) 7 |
| What type of energy is associated with the movement of particles? (a) Potential energy (b) Kinetic energy (c) Chemical energy (d) Nuclear energy | (b) Kinetic energy |
| Which gas do plants take in from the atmosphere for photosynthesis? (a) Oxygen (b) Nitrogen (c) Carbon Dioxide (d) Hydrogen | (c) Carbon Dioxide |
| What unit is used to measure electric resistance? (a) Ampere (b) Volt (c) Ohm (d) Watt | (c) Ohm |
| What is the general formula of an alkane? (a) CnH2n+2 (b) CnH2n (c) CnH2n-2 (d) CnHn | (a) CnH2n+2 |
| What causes tides on Earth? (a) Earth's rotation (b) Sun's gravity (c) Moon's gravity (d) Wind | (c) Moon's gravity |
| Which of these is a mammal? (a) Snake (b) Lizard (c) Bat (d) Frog | (c) Bat |
| What is used to measure weight? (a) A ruler (b) A clock (c) A weighing scale (d) A thermometer | (c) A weighing scale |
| Which planet is known as the "Red Planet"? (a) Earth (b) Mars (c) Jupiter (d) Saturn | (b) Mars |
| What is the name of the process by which plants make their own food using sunlight? (a) Respiration (b) Transpiration (c) Photosynthesis (d) Germination | (c) Photosynthesis |
| What is the chemical symbol for gold? (a) Ag (b) Au (c) Fe (d) Cu | (b) Au |
| What is the formula for calculating speed? (a) Speed = Distance x Time (b) Speed = Time / Distance (c) Speed = Distance / Time (d) Speed = Acceleration x Time | (c) Speed = Distance / Time |
| What is the function of the ribosomes in a cell? (a) Energy production (b) Waste disposal (c) Protein synthesis (d) Storage of genetic material | (c) Protein synthesis |
| Which of the following is a longitudinal wave? (a) Light wave (b) Water wave (c) Radio wave (d) Sound wave | (d) Sound wave |
| What is the process of separating crude oil into different fractions based on boiling points? (a) Cracking (b) Polymerization (c) Distillation (d) Filtration | (c) Distillation |
| What causes earthquakes? (a) Volcanic eruptions (b) Plate tectonics (c) Weather patterns (d) Solar flares | (b) Plate tectonics |
| Which part of a flower attracts insects for pollination? (a) Stem (b) Leaves (c) Petals (d) Roots | (c) Petals |
| Which of these is a source of light? (a) Moon (b) Mirror (c) Table (d) Sun | (d) Sun |
| What is the name for the different shapes of the Moon we see from Earth? (a) Lunar eclipses (b) Solar eclipses (c) Phases of the Moon (d) Tides | (c) Phases of the Moon |
| What are enzymes primarily composed of? (a) Carbohydrates (b) Lipids (c) Proteins (d) Nucleic acids | (c) Proteins |
| What is the name for a solution with a high concentration of OH- ions? (a) Acidic (b) Basic (c) Neutral (d) Salt | (b) Basic |
| What does the area under a velocity-time graph represent? (a) Acceleration (b) Displacement (c) Force (d) Energy | (b) Displacement |
| What is the process by which organisms adapt to their environment over long periods of time? (a) Mutation (b) Evolution (c) Cloning (d) Genetic engineering | (b) Evolution |
| What is the phenomenon responsible for the formation of rainbows? (a) Reflection (b) Refraction (c) Diffraction (d) Interference | (b) Refraction |
| What is the name for a chemical reaction that releases heat? (a) Endothermic (b) Exothermic (c) Sublimation (d) Neutralization | (b) Exothermic |
| Which type of rock is formed from the compression of sediments over time? (a) Igneous rock (b) Metamorphic rock (c) Sedimentary rock (d) Volcanic rock | (c) Sedimentary rock |
| Which of these animals is an insect? (a) Spider (b) Snail (c) Ant (d) Worm | (c) Ant |
| What happens to water when it is heated? (a) It freezes (b) It melts (c) It evaporates (d) It solidifies | (c) It evaporates |
| What is the name of the natural satellite that orbits the Earth? (a) Sun (b) Moon (c) Mars (d) Venus | (b) Moon |
| Which of the following is the site of photosynthesis in plants? (a) Mitochondria (b) Chloroplast (c) Nucleus (d) Ribosome | (b) Chloroplast |
| What is the chemical formula for carbon dioxide? (a) CO (b) CO2 (c) C2O (d) C2O2 | (b) CO2 |
| What type of energy is possessed by a moving object? (a) Potential energy (b) Kinetic energy (c) Nuclear energy (d) Chemical energy | (b) Kinetic energy |
| Which blood type is known as the universal donor? (a) A (b) B (c) AB (d) O | (d) O |
| What is the name of the process in which a nucleus splits into smaller nuclei, releasing energy? (a) Fusion (b) Fission (c) Ionization (d) Condensation | (b) Fission |
| Which of the following is an example of a strong acid? (a) Acetic acid (b) Carbonic acid (c) Hydrochloric acid (d) Citric acid | (c) Hydrochloric acid |
| What do all animals need to survive? (a) Air, food, water (b) Sunlight, soil, air (c) Plants, water, sunlight (d) Rocks, soil, water | (a) Air, food, water |
| What is the property of a material that describes how well it allows electricity to flow through it? (a) Magnetism (b) Conductivity (c) Density (d) Solubility | (b) Conductivity |
| What process is responsible for passing genetic information from parents to offspring? (a) Mutation (b) Natural Selection (c) Heredity (d) Gene Therapy | (c) Heredity |
| What type of chemical reaction is the burning of wood? (a) Neutralization (b) Decomposition (c) Combustion (d) Dissolution | (c) Combustion |
| What is the SI unit for measuring force? (a) Watt (b) Joule (c) Pascal (d) Newton | (d) Newton |
| What happens to the shadow of an object when the light source is moved closer to it? (a) The shadow gets smaller (b) The shadow gets bigger (c) The shadow disappears (d) The shadow stays the same | (b) The shadow gets bigger |
| Which structure controls the entry and exit of substances in and out of a cell? (a) Cell wall (b) Cytoplasm (c) Cell membrane (d) Nucleus | (c) Cell membrane |
| Which state of matter has the highest kinetic energy of its particles? (a) Solid (b) Liquid (c) Gas (d) All have equal kinetic energy | (c) Gas |
| What is the name for the bending of light as it passes from one medium to another? (a) Reflection (b) Refraction (c) Diffraction (d) Interference | (b) Refraction |
| What is the main gas that contributes to global warming? (a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Hydrogen | (c) Carbon dioxide |
| What is the changed variable (independent variable) in their experiment? (a) The type of plant. (b) The amount of water given. (c) The amount of sunlight each plant received. (d) The height of the plants after a week. | (c) The amount of sunlight each plant received. |
| Which of the following food groups provides the main source of energy for our daily activities? (a) Fruits and vegetables (b) Meat, fish, and eggs (c) Rice, bread, and noodles (d) Dairy products | (c) Rice, bread, and noodles |
| A simple food chain in a garden is shown below: Cabbage Plant → Snail → Bird What is the role of the snail in this food chain? (A) Producer (B) Primary consumer (C) Secondary consumer (D) Decomposer | (B) Primary consumer |
| Which gas do plants take in from the environment for photosynthesis? (A) Oxygen (B) Nitrogen (C) Carbon dioxide (D) Hydrogen | (C) Carbon dioxide |
| Which of the following is a primary function of the human skeleton? (A) To pump blood around the body (B) To digest food (C) To provide support and shape to the body (D) To send messages to the brain | (C) To provide support and shape to the body |
| What is a habitat? (A) The type of food an animal eats. (B) The natural home or environment where an organism lives. (C) The way an animal protects itself from danger. (D) The interaction between different animals in an area. | (B) The natural home or environment where an organism lives. |
| Where does the digestion of food mainly begin in the human body? (A) Stomach (B) Small intestine (C) Mouth (D) Oesophagus | (C) Mouth |
| What are the waste products of respiration in humans? (A) Oxygen and water (B) Carbon dioxide and water (C) Glucose and oxygen (D) Carbon dioxide and glucose | (B) Carbon dioxide and water |
| Which of the following best describes the role of a plant in a food chain? (A) Consumer (B) Producer (C) Decomposer (D) Predator | (B) Producer |
| A bird builds its nest in a tree. The tree provides shelter for the bird. This is an example of an interaction between: (A) Two non-living things (B) A living thing and a non-living thing (C) Two living things (D) A predator and its prey | (C) Two living things |
| What are the three main things a green plant needs from its environment to carry out photosynthesis? (A) Oxygen, sugar, and sunlight (B) Water, carbon dioxide, and sunlight (C) Water, oxygen, and soil (D) Carbon dioxide, sugar, and water | (B) Water, carbon dioxide, and sunlight |
| Which gas do humans and other animals primarily take in during respiration for their cells to release energy? (A) Carbon dioxide (B) Nitrogen (C) Oxygen (D) Hydrogen | (C) Oxygen |
| Which part of the human digestive system is mainly responsible for absorbing digested food into the bloodstream? (A) Stomach (B) Large intestine (C) Small intestine (D) Gullet (Oesophagus) | (C) Small intestine |
| A lion hunts and eats deer. Based on what it eats, a lion is classified as a: (A) Herbivore (B) Carnivore (C) Omnivore (D) Producer Answer: (B) Carnivore | (B) Carnivore |
| Ferns and mosses are plants that do not produce flowers or fruits. How do they mainly reproduce? (A) By seeds (B) By spores (C) By roots (D) By leaves | (B) By spores |
| Which of the following is NOT a primary function of the human skeleton? (A) To give shape and support to the body (B) To protect important organs (C) To help the body move (D) To digest food | (D) To digest food |
| The Singapore Pangolin is an animal whose numbers are very low, and it is at risk of disappearing completely. Such an animal is known as: (A) A common species (B) An extinct species (C) An endangered species (D) A producer species | (C) An endangered species |
| Which of the following statements is true about solids? (a) They take the shape of their container. (b) They can be compressed easily. (c) They have a definite volume and a definite shape. (d) They flow easily. | (c) They have a definite volume and a definite shape. |
| When ice cubes are left on a table at room temperature, they slowly turn into water. This process is called: (a) Freezing (b) Melting (c) Condensation (d) Evaporation | (b) Melting |
| What happens to water when it boils? (a) It changes from a liquid to a solid. (b) It changes from a gas to a liquid. (c) It changes from a liquid to a gas at a specific temperature. (d) It disappears completely. | (c) It changes from a liquid to a gas at a specific temperature |
| On a cold morning, you might see tiny water droplets on the outside of a window. This is because water vapour in the air has: (a) Melted into a liquid. (b) Evaporated into a gas. (c) Frozen into a solid. (d) Condensed into a liquid. | (d) Condensed into a liquid. |
| Which of the following is an example of a physical change? (a) Burning a piece of paper. (b) Rusting of an iron nail. (c) Dissolving sugar in water. (d) Baking a cake. | (c) Dissolving sugar in water. |
| When a candle burns, the wax melts and some of it turns into smoke and soot. Example of: (a) physical change. (b) chemical change. (c) Both a physical change and a chemical change. (d) Neither a physical nor a chemical change. | (c) Both a physical change and a chemical change. |
| Which of the following is primarily a chemical change? (a) Tearing a piece of cloth. (b) A metal gate becoming rusty. (c) Water freezing to form ice. (d) A glass bottle shattering. | (b) (Explanation: Rusting involves iron reacting with oxygen to form a new substance, iron oxide.) |
| Which of the following statements is true for ALL matter? (A) It can be seen with the naked eye. (B) It has a fixed shape. (C) It has mass and occupies space. (D) It is hard and strong. | (C) Matter is defined as anything that has mass and takes up space (volume). Not all matter can be seen (e.g., gases), not all has a fixed shape (liquids and gases), and not all is hard and strong. |
| Which of the following is NOT a property of a liquid? (A) It has a definite volume. (B) It takes the shape of its container. (C) It can be compressed easily. (D) Its particles can move and slide past one another. | (C) Liquids have a definite volume and take the shape of their container. Their particles can move. However, liquids are not easily compressible, unlike gases. |
| When ice cubes are taken out of the freezer and left on a table at room temperature, they slowly turn into water. This process is called: (A) Freezing (B) Melting (C) Condensation (D) Evaporation | (B) Melting is the process where a solid changes into a liquid when it gains heat. |
| What happens to water when it boils? (A) It changes from a liquid to a solid. (B) It changes from a gas to a liquid. (C) It changes from a liquid to a gas throughout the liquid. (D) It disappears completely and no longer exists. | (C) Boiling is a rapid phase transformation where a liquid turns into a gas (steam) at a specific temperature (boiling point), with bubbles forming throughout the liquid. |
| On a cool morning, you might see tiny water droplets on the leaves of plants, even if it has not rained. This is an example of: (A) Evaporation (B) Melting (C) Condensation (D) Freezing | (C) Condensation is the process where water vapour (a gas) in the air turns into liquid water when it cools down. |
| Which of the following is an example of a physical change? (A) Burning a piece of paper (B) A metal nail rusting (C) Dissolving sugar in water (D) A seed growing into a plant | (C) Dissolving sugar in water |
| When wood burns in a fire, it turns into ash and smoke. This is an example of: (A) A physical change only (B) A chemical change (C) A change of state (D) Melting | (B) Burning wood is a chemical change because new substances (ash, smoke, gases like carbon dioxide) are formed, and the change is generally irreversible. |
| Which of the following describes a chemical change? (A) Water freezing to form ice. (B) An apple being cut into slices. (C) A cake being baked from batter. (D) Chocolate melting in the sun. | (C) Baking a cake involves chemical changes. |
| How does heat from the Sun reach the Earth? A) Mainly by conduction B) Mainly by convection C) Mainly by radiation D) Mainly by conduction and convection equally | C) Mainly by radiation |
| Which of the following statements about light is TRUE? A) Light can pass through all objects. B) Light travels in curved lines. C) We see objects because they produce their own light. D) A shadow is formed when light is blocked by an opaque object. | D) A shadow is formed when light is blocked by an opaque object. |
| 1. What is deforestation? o A) Planting more trees o B) Cutting down trees o C) Protecting forests o D) Recycling paper | o B) Cutting down trees |
| 2. Which of the following is a renewable resource? o A) Coal o B) Oil o C) Solar energy o D) Natural gas | o C) Solar energy |
| 3. What is the main cause of air pollution? o A) Planting trees o B) Using bicycles o C) Burning fossil fuels o D) Recycling waste | o C) Burning fossil fuels |
| 5. What is the greenhouse effect? o A) Cooling of the Earth o B) Warming of the Earth o C) Plant growth in greenhouses o D) Water pollution | o B) Warming of the Earth |
| 6. Which of the following is a consequence of deforestation? o A) Increased biodiversity o B) Soil erosion o C) Improved air quality o D) More rainfall | o B) Soil erosion |
| 9. What is the primary source of energy for the water cycle? o A) Wind o B) Sun o C) Moon o D) Earth | o B) Sun |
| 10. Which of the following practices can reduce pollution? o A) Using plastic bags o B) Burning waste o C) Using public transport o D) Cutting down trees | o C) Using public transport |
| 1. What causes day and night on Earth? o A) Earth's rotation o B) Earth's revolution o C) Moon's rotation o D) Sun's rotation | o A) Earth's rotation |
| 3. What is a solar eclipse? o A) Earth comes between the Sun and the Moon o B) Moon comes between the Sun and Earth o C) Sun comes between Earth and Moon o D) Earth comes between Moon and Sun | o B) Moon comes between the Sun and Earth |
| 6. What is the main cause of seasons on Earth? o A) Earth's rotation o B) Earth's tilt o C) Moon's phases o D) Sun's activity | o B) Earth's tilt |
| 7. What is a lunar eclipse? o A) Earth comes between the Sun and the Moon o B) Moon comes between the Sun and Earth o C) Sun comes between Earth and Moon o D) Earth comes between Moon and Sun | o A) Earth comes between the Sun and the Moon |
| 3. What causes wind? o A) Earth's rotation o B) Differences in air pressure o C) Ocean currents o D) Earth's gravity | o B) Differences in air pressure |
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