QUIZ TIME

You put one egg in fresh water and another in salt water. What happens to the egg in salt water?

• It sinks to the bottom.

• It floats to the top.

• It stays in the middle of the water.

Which of the following materials will let electricity pass through easily?

• Plastic spoon

• Metal paperclip

• Wooden stick

You carefully pour honey, water, and oil into a glass. What happens to the liquids?

• They mix together completely.

• They separate into layers based on their weight.

• They all float to the top.

Your mother is cooking in the kitchen and asks you to hand her a spoon to stir the hot soup. You remember from your science experiment done in the PACT class that some materials let electricity and heat pass through, while others do not. Which spoon would be the safest choice to give her?

• A metal spoon

• A plastic spoon

• An aluminum spoon

If you wrap a copper wire around a screw and connect the wire to a battery, what happens?

• The screw turns into a magnet.

• The screw melts.

• The screw lights up.

During our PACT MAD Science experiment, you placed a balloon-powered boat in the water and released the air. You observed that the boat moved forward.

What is the science behind this movement?

• The balloon pulls the boat backward.

• The air pushes the boat forward.

• The boat moves only if you push it.

What happens when you press hard on a mixture of cornstarch and water?

• It stays soft and runny.

• It becomes hard like a solid.

• It disappears.

Maya and Ron want to test if adding salt to water changes how things float. They put a lemon in fresh water, and it sinks. What should they do to make the lemon float?

Shadivye wants to pick up small paper clips using a magnet, but the magnet is not strong enough. He remembers an experiment where he made a magnet stronger. What should he do?

• Attach the magnet to a battery using a wire.

• Wash the magnet with soap.

• Put the magnet in the freezer.

In class, Ira tested different kitchen materials to see if they let electricity pass. Which of these items from her experiment was a conductor?

• A wooden spoon

• A metal knife

• A plastic bottle