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Quiz #1 PE and KE1
| Question | Answer |
|---|---|
| What is energy? | The ability to cause change or make something move. |
| What is potential energy? | Stored energy an object has because of its position. |
| What is gravitational potential energy? | Stored energy an object has because of its height. |
| What is kinetic energy? | The energy an object has because it is moving. |
| What two factors affect potential energy? | Mass and height. |
| What two factors affect kinetic energy? | Mass and speed. |
| How does height affect potential energy? | As height increases, potential energy increases. As height decreases, potential energy decreases. |
| How does mass affect potential energy? | At the same height, an object with more mass has more potential energy. |
| How does speed affect kinetic energy? | As speed increases, kinetic energy increases. |
| How does mass affect kinetic energy? | At the same speed, an object with more mass has more kinetic energy. |
| Can an object at rest have potential energy? | Yes. An object at rest can have stored energy because of its height. |
| Does an object at rest have kinetic energy? | No. An object must be moving to have kinetic energy. |
| Can an object have both potential and kinetic energy? | Yes. A moving object above the ground can have both types of energy. |
| Two identical balls are on shelves of different heights. Which has more potential energy? | The ball on the higher shelf because it has greater height. |
| Two balls with different masses are on the same shelf. Which has more potential energy? | The ball with greater mass because both balls are at the same height. |
| Two identical bicycles travel at different speeds. Which has more kinetic energy? | The faster bicycle because it has greater speed. |
| A truck and a bicycle travel at the same speed. Which has more kinetic energy? | The truck because it has greater mass. |
| What happens to potential energy as an object moves downward? | Potential energy decreases because the object's height decreases. |
| What happens to kinetic energy as a falling object speeds up? | Kinetic energy increases because the object's speed increases. |
| What happens to a ball's potential energy as it rolls down a ramp? | Its potential energy decreases because its height decreases. |
| What happens to a ball's kinetic energy as it rolls down a ramp? | Its kinetic energy increases because its speed increases. |
| Where does a pendulum have the greatest potential energy? | At the highest points of its swing because its height is greatest. |
| Where does a pendulum have the greatest kinetic energy? | Near the bottom of its swing because it is moving fastest. |
| Where does a diver have the greatest potential energy? | At the diver's highest position above the water. |
| How does a diver's potential energy change while falling? | The diver's potential energy decreases as the diver's height decreases. |
| How does a diver's kinetic energy change while falling? | The diver's kinetic energy increases as the diver gains speed. |
| A ball is held above the floor. What type of energy does it have? | It has potential energy because of its height. |
| A ball is released and begins falling. What happens to its energy? | Potential energy decreases as height decreases, while kinetic energy increases as speed increases. |
| A skateboarder is standing still at the top of a hill. Which type of energy is greatest? | Potential energy because the skateboarder is at a high position and is not moving. |
| A skateboarder travels down a hill and gains speed. What energy changes occur? | Potential energy decreases, while kinetic energy increases. |
| What should a potential-energy bar graph show as height increases? | The potential-energy bars should become taller. |
| What should a kinetic-energy bar graph show as speed increases? | The kinetic-energy bars should become taller. |
| What does an upward-sloping line on a graph show? | The quantity on the vertical axis increases as the quantity on the horizontal axis increases. |
| What does a downward-sloping line on a graph show? | The quantity on the vertical axis decreases as the quantity on the horizontal axis increases. |
| A graph shows potential energy increasing as height increases. Is this reasonable? | Yes. An object has more potential energy at a greater height. |
| A graph shows kinetic energy staying constant while speed increases. Is this reasonable? | No. Kinetic energy should increase as speed increases. |
| How should you compare objects in an energy table? | Identify whether mass, height, or speed changes, and determine how that change affects energy. |
| Why should you read the labels on a graph's axes? | The axes tell you which quantities are being compared. |
| Why should you read a graph's key or legend? | The key identifies what each line, bar, color, or pattern represents. |
| What evidence supports the claim that a higher object has more potential energy? | The object's greater height gives it more stored energy. |
| What evidence supports the claim that a faster object has more kinetic energy? | The object's greater speed gives it more energy of motion. |
| What does greatest potential energy mean? | The object has the most stored energy because of its mass or height. |
| What does least potential energy mean? | The object has the smallest amount of stored energy, usually because it is at the lowest height. |
| What does greatest kinetic energy mean? | The object has the most energy of motion because of its mass or speed. |
| What does least kinetic energy mean? | The object has the smallest amount of energy of motion. An object at rest has no kinetic energy. |
| How can you evaluate a student's claim about energy? | Examine the object's height, mass, speed, and motion, and decide whether the evidence supports the claim. |
| What sentence frame can you use to compare potential energy? | The object has more potential energy because it has greater _____. |
| What sentence frame can you use to compare kinetic energy? | The object has more kinetic energy because it has greater _____. |
| What sentence frame can you use to explain an energy change? | As the object's _____ changes, its _____ energy increases or decreases because _____. |
| What should you compare when two objects have the same mass? | Compare their heights for potential energy or their speeds for kinetic energy. |
| What should you compare when two objects are at the same height? | Compare their masses. The object with greater mass has more potential energy. |
| What should you compare when two objects move at the same speed? | Compare their masses. The object with greater mass has more kinetic energy. |
| What four clues should you identify in an energy situation? | Height, mass, speed, and motion. |
| What steps should you use to analyze an energy graph? | Read the title, check both axes, examine the key, identify the pattern, and connect the pattern to mass, height, speed, or motion. |
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