Question | Answer |
What are the five types of Active energy? | Radiant, Sound, Kinetic, Heat and Electrical. |
What are the five types of Potential energy? | Gravitational, Elastic, Nuclear, Chemical and Magnetic. |
Can energy be destroyed or disappear? | No, it can only be transferred or transformed. |
What is the equation for energy efficiency? | Useful energy × 100 ÷ Energy Input. |
What are the two most common waste energy? | Heat and Sound. |
What is energy measured in? | Joules (J). |
Energy must come from somewhere. True of False? | True. |
When would atoms of molecules vibrate faster? | When it is heated. |
What do you write in the conclusion of a experiment? | How valid the answer is, comparisons, assumptions and improvements. |
What is the Energy Output equal to? | The Energy Input. |
Where does all the energy come from? | The Sun. |
How can heat be transferred? | Conduction, Radiation, and Convection. |
What is Conduction? | Moving heat along a solid object. |
What is Radiation? | Heat waves emitting from a hot object. |
What is Convection? | Currents created in liquids or gases. |
Why are metals good thermal conductors? | They have free electrons that allow the heat to spread rapidly. |
Give some examples of a thermal insulator. | Plastic, glass, wood, and pottery. |
The total amount of changed energy remains ... | The same. |
Energy transfers from Hot objects to ... | Cold objects. |
Why do you feel cold? | You are losing the heat to the cold air around you. |
Adding or removing heat can ... | Cause the object to change state. |
What is the definition of energy? | Something that is need to make things happen. |