Science G2- U12 Review

What do the words above and below describe?

• position

• force

• speed

• weight

How do iron objects react to magnets?

• They are attracted to magnets.

• They become heavier.

• They are repelled by magnets.

• They make less friction.

Which machine is best for sliding a box off a truck?

• a lever

• a pulley

• a wheel and axle

• a ramp

How can you tell if two magnetic poles  are the same?

• They attract each other.

• They attract iron.

• They repel each other.

• They stop friction.

What information do you need to measure speed?

• time and position

• pole and kind of material

• force and kind of surface

• size and weight

Which is true about opposite magnetic pole?

• They move away from each other.

• They cannot pick up steel objects.

• They stick to wooden objects.

• They are attracted each other.

What is needed to cause motion?

• two rough surfaces

• change in weight

• pulling or pushing force

• magnetic poles

What must you know to describe an object’s motion?

• its shape and color

• its change in position

• its size and weight

• the material it is made  of

What kind of machine is a doorknob?

• a lever

• a wheel and axle

• a ramp

• a pulley

What is true about all magnets?

• They can sort metal objects.

• They have two similar poles.

• They are shaped like bars.

• They are simple machine.