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Energy Science Test
Study Guide
| Question | Answer |
|---|---|
| Law of Conservation of Energy | States that energy can NEVER be created or destroyed! |
| Elastic Potential Energy | Energy stored when an object is compressed or stretched |
| Chemical Potential Energy | Energy stored in chemical bonds |
| Joule | SI unit of energy |
| Kinetic Energy | Energy a moving object has because of it's motion; depends on mass and speed of the object (KE = 1/2(Mass)(V)2 |
| Gravitational Potential Energy | Energy stored by objects due to their position above Earth's surface; depends on the distance above Earth's surface and the objects mass. (GPE = (Mass)(G 9.8)(Height) |
| Mechanical Energy | Sum of potential energy and kinetic energy in a system (PE + KE = ME) |
| Potential Energy | Stored energy an abject has due to it's position |
| An electric blanket warms a bed on a chilly night. | Electrical to Thermal energy |
| A rock in Death Valley, California, becomes hot during a summer afternoon | Radiant energy to Thermal |
| A chandelier brightens a ballroom after a waiter moves a switch | Electrical to Thermal |
| Fill In the blanks Two baseballs have the same mass The ball that is closer to the ground has _ GPE than the other ball does Two trucks have the same velocity but different mass. The truck with the greater mass has _ KE than the other truck A More B Les | First one B Second one A |
| 1_ is the ability to cause change. A 2_ is a unit of measure of all forms of energy When an object falls some of its 3_ energy changes to 4_ Energy A Potential B Joule C Energy D Kinetic | 1. energy 2. Joule 3. Potential 4. Kinetic |
| The 1_ energy of an object depends on its mass and weight The energy of food and other fuels is 2_ potential energy A potential B chemical | 1. A 2. B |
| One food calorie is equivalent to about how many joules | 4184 |
| Energy has different 1__ including 2__ which is energy of motion also including potential energy which is 3__ and that can be 4__ but never 5__ | 1.Forms 2.Kinetic Energy 3.Stored Energy 4.Transformed 5.Can be created or destroyed |
| if friction can be ignored the __ of the system doesn't change | Mechanical Energy |
| The muscles of a runner transform chemical potential energy into ___ | Kinetic Energy |
| What occurs when energy is transferred from one object to another? A. an explosion B. a chemical reaction C. nuclear fusion D. a change | D. a change |
| For which of the following is kinetic energy converted into potential energy? A. a boulder rolls down a hill B. a ball is thrown upward C. a swing comes to a stop D. a bowling ball rolls horizontally | B. a ball is thrown upward |
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