Extra practice for grade 3

What occurs when two negatively charged objects are brought near each other?

• a. They will push away from one another.

• b. They will pull toward each other.

• c. They will stay in place.

• d. They will draw each other closer.

Two objects with the same charge will attract each other.

• True

• False

What happens to an electromagnet's strength if you put stronger battery?

• a. it gets weaker.

• b. it stays the same.

• c. it gets stronger.

• d. it stops working.

• - Net force = zero

this sentence refers to unbalanced force.

• True

• False

The motion of cat is regular motion.

• True

• False

Jumping rope exercise is regular motion.

• True

• False

Magnets have 4 poles.

• True

• False

Magnet attracts all metals.

• True

• False

....................................is a material can not be attracted by the magnet.

• Steel

• Iron

• Nickel

• Wood

Which of the following materials can be attracted by a magnet?

• Wood

• Plastic

• Iron

• Glass