Questions and Answers
What is energy?
Which statements are true?
1.
Energy cannot be destroyed or made.
True
2.
Energy cannot be changed from one form to another.
False
3.
Potential and kinetic energy cannot be exchanged into each other.
False
4.
Kinetic energy is:
motion relative
5.
Which of those are forms of kinetic energy?
thermal, electrical, light
Match energy form with its source.
6.
chemical energy
bonds between molecules
7.
electrical energy
moving electrons
8.
thermal energy
vibrating and moving of molecules
9.
Ability to do work is called:
energy
10.
What is the main source of energy on Earth?
Most of the energy used on Earth comes from the sun.
11.
What form of energy is this?
Elevator at the highest floor of a building has high potential energy.
12.
Is it kinetic or potential energy?
The faster an object is moving, the more kinetic energy it has.
13.
Which law states that energy can neither be created nor destroyed - only converted from one form of energy to another?
Law of conservation of energy
14.
Complete the sentence.
The sun provides plants with electromagnetic energy, which plants convert into chemical energy.
15.
Is sound a form of energy?
yes
16.
What form of energy has a stretched rubber band?
potential
17.
What form of energy has a flying tennis ball?
kinetic
18.
What form of energy has air running out of flat tire?
kinetic