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Praxis Science
Elementary Education
| Question | Answer |
|---|---|
| What is the term for the thick layer surrounding Earth's outer core? | Mantle |
| Which is an example of a metamorphic rock? A. Sand B. Sediment C. Schist D. Granite | C. Schist |
| Which of the following two gasses compost the vast majority of the Earth's atmosphere? | Nitrogen and Oxygen |
| Mountains are most likely to form along which type of plate boundary? | Convergent |
| Approximately how long ago did the first anatomically modern humans appear on the Earth? | 200,000 years ago |
| What are months based on? | The moon's revolution around the Earth. |
| How are most waves on the ocean's surface created? | Wind stirs the ocean's surface over great distances. |
| The shape of the Milky Way can best be described as... | A spiral disk |
| What is the moon's position relative to Earth during a lunar eclipse? | The moon and sun are on opposite sides of the Earth. |
| Best describes a difference in how two types of organisms maintain homeostasis? | A snake depends predominantly on external factors like sunlight to regulate its body temperature, while a rabbit utilizes mainly internal processes. |
| During which phase of mitosis do the duplicated chromosomes line up along the equatorial plate of the spindle? | Metaphase |
| How many pairs of chromosomes are contained within a typical cell in the human body. | 23 |
| A behavioral response from an organism is determined by what factors? | Hereditary and Experience |
| Which structure is responsible for regulating basic functions, such as respiration and heartbeat? | Brainstem |
| If two brown-eyed parents each carry a recessive gene for blue eyes, what is the probability if them having a blue-eyed child? | 1/4 |
| Explain why a person cannot drink sea water. | The high salinity of sea water causes tissues to become dehydrated due to the osmotic diffusion of water from within the cells |
| Within a forest ecosystem a rabbit is considered what type of consumer? | primary consumer |
| Which of these is not a division within the standard system of scientific taxonomy? A. phylum B. species C. rank D. order | C. rank |
| Using the periodic table, how would you find elements with chemical properties similar to Helium? | Look in the column below it. |
| The time required for half the atoms of a particular substance to disintegrate is known as that substance's _____________________. | Half life |
| Which of the following factors least affects a compound's tendency to change state? A. Pressure B. Temperature C. Type of Compound D. Mass | D. Mass |
| The force of gravitational attraction between two bodies is least dependent on which of the following? A. Mass of the larger body B. Distance between the bodies C. Temperature of the bodies D. Mass of the smaller body | C. Temperature of the bodies |
| What is the term for the process of releasing atomic energy by bombarding a dense element with neutrons and splitting its nucleus? | Fission |
| As a part of a science class, a clear pot of water with heat censors is placed above a burner. The water begins to boil, and a student observes that the hottest water at the bottom of the container seems to move upward and the cooler water moves down. | Heat is convected through the water, causing the hotter, less dense water to rise. Cooler, denser water then moves in to take its place. |
| The filament in a light bulb is made of a material which provides more _______________ than the copper wires through which electricity usually flows? | Resistance |
| Which wavelength is the shortest? | UV radiation |
| Which of the following is not considered a major class a nutrient? A. Fibers B. Fats C. Vitamins D. Water | A. Fibers |
| Which of the following would be considered a scientific career? A. Archaeologist B. Doctor C. Physicist D. All of the Above | D. All of the above |
| Which of the following would not necessarily contribute to the reduction of uncertainty when investigating a scientific phenomenon? A. Development of knowledge about related factors. B. New hypothesis C. More observations D. Better explanatory models | B. New hypothesis |
| The process by which sediments are compacted and cemented into sedimentary rock is known as what? | Lithification |
| The concept of plate tectonics describes the large scale motions of which of the following? A. The Earth's biosphere B. The Earth's lithosphere C. The Earth's hydrosphere D. The Earth's atmosphere | B. The Earth's lithosphere |
| According to Kepler's First Law of Planetary motion the orbit of every planet is what? | Elliptical |
| Which of the following bodies of water would be most likely to have the lowest salinity level? A. The Indian Ocean B. The Baltic Sea C. The Chesapeake Bay D. The Colorado River | D. Colorado River |
| What scenario would create the most extreme tides? | The Moon and Sun's gravitational pull on the Earth when they are in alignment |
| Which would not be an example of an organism responding to an environmental stimulus? A. House cat scurrying away when someone tries to pet it. B. A house plant bending toward the light coming in from a window. C. A pigeon laying an egg. | C. A pigeon laying an egg |
| What part of the animal cell deal primarily with synthesizing protein chains? | Ribosomes |
| Which events happens most often during a year? A. Earth completes a full rotation on its axis B. Moon completes a full revolution around Earth. C. Earth completes a full revolution around Sun. D. Earth tilts a full 180 degrees on its axis | A. Earth completes a full rotation on its axis |
| What is the key element needed for a fern to reproduce? | Moisture |
| Barnacles adhering to the shell of a mollusk is an example of what? | Commensalism |
| The process by which a butterfly goes from being 1) an egg to 2) a caterpillar into 3) a cocoon and finally into its 4) adult form would best be described as what? | Its life cycle |
| An atom that is made up of 1 proton, 1 neutron, and 2 electrons would be classified as what? | A negative ion |
| Which of the following solutes would provide the best opportunity to create a solution in a glass of water? A. Sand B. Tea leaves C. Sugar D. Oil | C. Sugar |
| Tom throws a baseball as high as he can into the air and then watches it fall to the ground. At what point during the ball's trajectory would it possess the most potential energy? | At the apex of its trajectory |
| In a swimming pool, Jane is able to maintain a handstand, her entire body remaining completely still for 20 seconds. She is in a state of ________________. | Equilibrium |
| Temperature will have no effect on the velocity of hydrogen atoms. True of False | True |
| Magnetism can be used to create electricity, but the process cannot be reversed. True or False | False |
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