Material Magic

If it's really hot and sunny outside, you probably want to wear clothes that are:

• water-proof

• heat-trapping

• see-through

• absorbent

If you were designing a hat to keep you warm, which material properties would you choose?

• hard and stiff

• see-through and absorbent

• heat trapping and soft

• heavy and stretchy

Why aren't oven mitts made out of metal?

• Metal lets the heat through to your hand.

• Metal is too expensive.

• Metal is too heavy.

• Metal isn't very comfortable.

Why do you need a metal pan to fry an egg on a hot sidewalk?

• So that the egg won't get dirty.

• Makes it easier to serve the egg.

• The metal conducts heat so the egg gets hotter.

• The pan can hold butter too.

What do popsicles and plastic toys have in common?

• Both of them get very cold.

• Both of them are liquids.

• Both of them are made out of water.

• Both of them are made out of meltable materials.

Why was it easier to make plastic toys instead of wooden toys?

• Plastic can be melted and poured into copies of the same toy.

• Plastic doesn't grow in the ground.

• Plastic can be painted different colors.

• Plastic doesn't have bark that needs to be removed.

Scientists invent new materials so that scientists can _________.

• tell each other about them.

• use the materials to invent things that solve problems.

• store the materials in their lab rooms.

• do aas many experiments as possible.