Energy

True or False Energy can be created or destroyed

• Always True

• Always False

• Sometimes

• No idea

What are three things photosynthesis needs?

• Light energy

• Water

• Carbon dioxide (CO2)

• Oxygen

At what position does the rock have the greatest kinetic energy?

• A
• B
• D
• E

What kind of energy?

• Thermal (kinetic) energy
• Chemical (kinetic) energy
• Chemical (potential) energy
• Mechanical (kinetic) energy

_{Which form of energy is mostly produced in this conversion?}

• Electrical
• Mechanical
• Thermal
• Sound

You hit the brakes on your bike. The bike slows down and the brake pads increase in temperature.
What type of energy decreased when you hit the brakes?

• kinetic energy
• gravitational energy
• elastic energy
• thermal energy

Which form of energy is least important in this tool?

• Electrical

• Light

• Thermal

Select all the renewable energy sources.

• wind

• nuclear

• geothermal

• Hydroelectric

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

• 100%

• 7%

• 93%

• 95%

Which of the following is NOT a form of energy?

• movement

• body mass

• heat

• food (chemical)