Science Energy Review

What is energy?

• the use of force to move an object over a distance

• how well a material conducts an electric current

• a push or pull

• the ability to cause a change or do work

Which device uses electric current to intentionally produce light?

• microphone

• blow dryer

• lamp

• toaster

A thin strip of metal foil has a negative electric charge. You bring a balloon that also has a negative charge near the foil. What will MOST LIKELY happen?

• The foil will bend toward the balloon.

• The foil will bend away from the balloon.

• The balloon will cause the foil to have a positive charge.

• The foil will cause the balloon to have a positive charge.

Energy you can hear is what kind of energy?

• sound

• nuclear

• electromagnetic

• light

Which of the following is an example of a force?

• gravity

• chemical energy

• a proton

• light

Which object can BEST conduct an electric current?

• a rubber bank

• a copper nail

• a strip of cardboard

• a wooden toothpick

Which of the following is the term for any complete loop through which electric current flows successfully?

• parallel circuit

• series circuit

• closed circuit

• open curcuit

The more mass an object has, the

• less work the object can do.

• more work the object can do.

• less effect a force will have on the object's motion.

• more effect a force will have on the object's motion.

What energy change happens when you burn gas to run a lawn mower?

• electrical energy turns into chemical energy.

• chemical energy turns into mechanical energy.

• electrical energy turns into sound energy.

• chemical energy turns into light energy.

A ball has two forces acting on it. One force pushes it to the left, and a larger force pushes it to the right. If the ball moves to the right, which term BEST describes the forces acting on the ball?

• electric forces

• magnetic forces

• balanced forces

• unbalanced forces