Material Magic - Unit Assessment

What is your name?

1. If it’s really hot and sunny outside, you probably want to wear clothes that are...

• waterproof.
• heat-trapping.
• see-through.
• absorbent

2. Why are oven mitts NOT 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.

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

• The pan will keep the egg from getting dirty.
• The pan makes it easier to serve the egg.
• The pan conducts heat from the sidewalk.
• The pan absorbs heat from the sun.

4. What do popsicles and plastic toys have in common?

• Both of them can get very cold.
• Both of them are liquids.
• Both of them are made out of water.
• Both of them can be melted into shapes.

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

• Plastic doesn’t need to be carved by hand.
• Plastic doesn’t grow in the ground.
• Plastic can be painted different colors.
• Plastic doesn’t have bark that needs to be removed.

6. Scientists invent new materials so that…

• tell each other about them.
• invent things to solve problems.
• store the materials in their laboratories.
• do as many experiments as possible.

7. A ________ can be built out of smaller pieces of _____.

• House…………… wood
• Skyscraper……… concrete and steel
• Wall……………… brick
• All of the above

8. If you are designing winter boots, which material properties would you choose? Choose as many properties as you want.

• soft
• stiff
• heat-trapping
• waterproof
• heavy

Why did you choose the answers to Question #8 above?