Work and energy

3. Which of these is a renewable source of energy?

• coal

• petrol

• wood

• sun

4. The ability to do work is called________.

• force

• machine

• energy

• work

6. Geothermal energy is obtained from the

• sun

• wind

• water

• Earth's interior

Something that changes the speed, direction, or shape of another object by pushing or pulling

• force
• motion
• science
• sponge bob

When you release a stretched rubber band, the rubber band has ________ energy. 

• kinetic 
• potential
• none of the above
• all of the above 

If a person falls down these stairs, what would happen to his potential energy?

• Increase

• Decrease

• Remain constant

Force × Distance = ----------

• Force

• Work

• Energy

What are renewable resources?

• A limited amount and cannot be replaced in a human life time.

• Plastic bags

• Coal, oil, and natural gas

• Can be replaced in our lifetime through natural processes

A group of non-renewable resources, called ______________, include coal, oil, and natural gas.

• Fossils

• Energy

• Resources

• Fossil fuels

Coal comes from...

• from animals that died millions of years ago.

• from plants that died millions of years ago.

• A factory

• Burning fossil fuels