Unit 3 Review

Rub your hands together. Which form of energy is produced from the friction when you rub your hands together?

• mechanical

• electrical

• light

• thermal

• sound

You turn on a lamp that is on top of your desk. When the lamp is on, electrical energy changes to what other form of energy?

• mechanical

• electrical

• light

• thermal

• sound

Pablo wants to know how long a battery will power a circuit. He connects the battery to a circuit. Which form of energy will stop being produced when the energy in the battery runs out?

• mechanical

• electical

• light

• thermal

• sound

The toy bunny is battery operated. When it turns on, it moves around banging on the drum. Which type of energy is the movement of the rabbit considered?

• mechanical

• electrical

• lights

• thermal

• sound

What energies are needed for this fan to work ?

• electrical and thermal

• electrical and mechanical

• mechanical and sound

• mechanical and thermal

What form of energy is being used when a person pushes heavy boxes across the floor? 

• Electrical energy
• Mechanical energy
• Heat energy
• Sound energy

Which form of energy is produced when a guitar string vibrates?

• Sound energy

• Electrical energy

• Chemical energy

• Light energy

What is energy?

• The ability to do work

• A force

• Electricity

• The ability to transform work

What is an electrical circuit?

• lets you turn the energy on and off
• a closed path where where electricity flows
• stop electricity from flowing through

What is a battery?

• switch
• power source
• insulator