Science 4: Test Reviewer

An object that makes work easier is called ____________.

• machine

• screw

• fulcrum

____________ is the force applied to cause a simple machine to do work.

• Effort

• Resistance

• Gravity

The amount of work you do depends on how much ____________ you use to move an object

• gravity

• force

• energy

A force moving an object over a distance is called ____________.

• work

• friction

• gravity

A wedge is one or more ____________ used to force materials apart.

• inclined planes

• screws

• pulleys

A block and tackle allows you to use ____________ force when lifting an object because the rope moves a greater distance.

• less

• more

A material that does not allow electricity to flow through it easily is called ____________.

• insulator

• conductor

____________ is a form of energy that involves the flow of electrical charges.

• Sound

• Electricity

An object that attracts certain metals is called ____________.

• magnet

• iron

• magma

A magnetic field is caused when ____________ flows through a circuit.

• current

• air

• water