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Science FINAL
| Question | Answer |
|---|---|
| cm -> mm... | X10! |
| The number of protons in an atom = | The atomic number and number of electrons |
| What is mass and what units does it use? | How much matter is in an object; mg, kg, and g |
| What is volume and what units does it use? | Amount of space; ml, L, and cm3 |
| What is density and what units does it use? | Mass in a given volume; g/ml and g/cm3 |
| How do you find the volume of an irregular shaped object? | DISPLACEMENT; fill a graduated cylinder with set amount of water, add object then subtract the difference. |
| The subscript of a chemical equation= | Number of atoms in the equation |
| What is a Compound molecule? | More than one type of an element in a molecule |
| What is a safe way to smell an object? | WAFT! Don't put near nose -fan fumes |
| What does it mean when objects are in the same group? What are groups? | The number of v. electrons and the react chemically similar; up and down on the periodic table |
| What does it mean when objects are in the same period? What are periods? | The number of energy levels; left to right on the periodic table |
| Proton charge... | + |
| Electron charge... | - |
| Neutron charge.. | 0 |
| The coefficient of a chemical equation= | Number of molecules in the equation |
| Which of the following is a chemical change? Sharpening a pencil, Water evaporating, Burning a pencil, Mixing sand and water, rusting steel, spray painting a car, melting ice cream, mixing lemon juice and baking soda, freezing water, and tearing paper. | Burning a pencil, Rusting steel and mixing lemon juice and baking soda |
| What are the five evidences of chemical reaction? | 1. Gas produced 2. Temperature change 3. Solid precipitate formed 4. Color change ( unexpected) 5. Light produced |
| What evidence shows the following? Photosynthesis, Decomposing, Fireworks, pouring hydrogen peroxide on a wound. | Solid participate formed- sugars created Temperature change- puts off heat Light produced Gas produced- bubbles and fizzes |
| What is the Law of Conservation of Mass? | Matter is never created or destroyed, only changed |
| Distance= | Speed x Time |
| Force= | Mass x acceleration |
| How do you find average speed? | Total distance/ total time |
| How do you tell the difference between a speed graph and an acceleration graph? | Speed graphs y=distance and x=time; line going up is forward, down is backward, flat is stopped. Acceleration graphs y=speed x=time; line going up is positive acceleration, line going down is negative acceleration, a flat line is constant speed. |
| What is Newton's first law? | Law of Inertia; An object at rest will stay at rest and an object in motion will stay at motion until acted upon by an unbalanced force |
| What is Newton's second law? | Law of Force and Acceleration; The acceleration of an object depends on the mass of the object and the amount of force applied to it |
| What is Newton's third law? | Law of Action/Reaction; for every action there is an equal and opposite reaction |
| What is/ what causes a sea breeze? | A breeze from the sea; Land heats up faster, cool air from the sea moves towards the land- Day |
| What is/ what causes a land breeze? | A breeze from the land; Land cools quicker than water causing a convection current cool air moves towards sea- night |
| How do warm ocean currents effect coastal climates? | Warmer climate |
| How do cold ocean currents effect coastal climates? | Colder climate |
| What is an air mass? | a large body of air takes on similar temperatures and humidity |
| Air pressure goes from______ to ______ | high to low |
| high pressure spins.. | clockwise |
| low pressure spins... | counter-clockwise |
| Weather associated with low pressure: | Warm; high humidity |
| Weather associated with high pressure: | Cold; low humidity |
| Warm air over cold.. (same direction) | Warm front- light rain for a few days, humid, and warm- semi circles |
| Cold air under warm.. (different direction) | Cold front- thunderstorms and afterwards clear skies, dry, and cold-triangles |
| Cold over warm... (same direction) | Stationary front-lots of clouds, rain, fog- semi circles and triangles different sides |
| Warm caught between 2 cold air masses... | Occluded front- cloudy and rainy, cold near ground -semi circles and triangles on the same side |
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P0902133
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