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Energy

Science Year 9 - New Zealand PATHFINDER Series

QuestionAnswer
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.
Created by: quicky
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