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Chapter 15- Science
| Question | Answer |
|---|---|
| As an object falls, the gravitation potential energy of the object is converted into _____. | Kinetic Energy |
| A moving object slows down because friction causes a continual conversion of kinetic energy into _____. | Thermal Energy |
| True/False: When an object slows down because of frictional force acting on it, an amount of energy is destroyed that is equivalent to the decrease in kinetic energy of the object. | False! |
| Can striking a match show that stored chemical energy & electromagnetic energy of the flame in a single step? | No! |
| When a wind up toy is in motion, elastic (PE) that was stored in a compressed spring is converted into the _______ of the toys moving parts. | Kinetic Energy |
| Can energy be converted from one form to another? | Yes |
| Chemical energy stored in wood, heat, and agricultural waste that can be converted into thermal energy is called _____. | biomass |
| Nuclear fusions waste product is mostly _____. | hydrogen |
| Wind turbines are powered by ____. | Wind |
| Most renewable energy originates from _____. | The Sun |
| What energy resource accounts for most of the worlds present energy use? | Fossil Fuels |
| The law of conservation states: | Energy cannot be created or destroyed |
| An example of the conservation of gravitational energy to kinetic energy is: | a falling raindrop |
| What is mechanical energy? | The sum of kinetic and potential energy of an object. |
| Energy stored in bonds between atoms is called: | Chemical energy |
| An example of electromagnetic energy is ____. | Sunlight |
| If the speed of an object doubles the kinetic energy _____. | Quadruples |
| What is the energy of a moving object? | Kinetic Energy |
| What is nuclear energy? | Energy stored in an atomic nuclei |
| What is electromagnetic energy? | Form of energy that travels through space in the form of waves. |
| An example of elastic potential energy is ______. | Stretching a rubber band. |
| What is electric energy? | Energy associated with electric charges |
| What is chemical energy? | Energy stored in chemical bonds. |
| What is thermal energy? | The total potential and kinetic energy related to the motion of all the microscopic particles |
| What is mechanical energy? | Energy associated with motion and position |
| What is elastic potential energy? | The potential energy of an object that is stretched or compressed |
| What is gravitational potential energy? | Potential energy that depends upon an objects height. |
| What is potential energy? | Energy that is stored as a result of position and shape. |
| What is kinetic energy? | Energy of motion |
| What is energy? | The ability to do work |
| True/False: Einsteins equation E=mc2, suggest that mass and energy together are conserved. | False! |
| What does Einstein's equation imply about mass and energy? | They are equivalent and can be converted into one another. |
| What type of energy is: a vibrating guitar string? | Both (KE and PE) |
| What type of energy is: a skier poised to take off at the top of a hill? | Potential Energy |
| What type of energy is: a car driving on a flat road? | Kinetic Energy |
| What type of energy is: a descending roller coaster? | Both |
| What type of energy is: a stationary wind-up toy with a compressed spring? | Potential Energy |
| True/False: For a mechanical change in an isolated system, the mechanical energy at the end of the process, as long as friction is negligible. | True |
| What increases as the pole bends before it propels a pole-vaulter up into the air? | Elastic Potential Energy |
| At which point during a pole-vaulers jump is his gravitational potential energy the greatest? | At its greatest height |
| Can potential energy & kinetic energy undergo constant conversion as a pendum swings? | Yes! |
Created by:
antinia00