Question

.
Choose the best answer.

A _____ building material is made when you add rocks and sand to cement.

weak

strong
2.
Choose the best answer.

A _____ is the combination of types of matter.

magnet

filter

mixture
3.
Choose the best answer.

A _____ brick is made when you add straw to adobe mud bricks.

weak

strong
4.
Match the definitions with the words.



a material made from resin and glass fibers



a material made from rocks, cement, and sand





a material that starts as a sticky, thick liquid that hardens to a solid


5.
Choose all that apply.

What TWO things can happen to glass fiber when you add resin?

It lets all the water through.

It does not break easily.

It breaks easily.

It does not let water through.
6.
Choose the best answer.

Generally, objects with a _____ area will float.

large

small
7.
Match the words with the mixtures they separate.



iron car parts in a junkyard



salt water




large and small pieces of matter

Answer 1

Here are the answers to your questions:

1. A **strong** building material is made when you add rocks and sand to cement.

2. A **mixture** is the combination of types of matter.

3. A **weak** brick is made when you add straw to adobe mud bricks.

4. Match the definitions with the words:
- a material made from resin and glass fibers: **composite material**
- a material made from rocks, cement, and sand: **concrete**
- a material that starts as a sticky, thick liquid that hardens to a solid: **resin**

5. What TWO things can happen to glass fiber when you add resin?
- It does not break easily.
- It does not let water through.

6. Generally, objects with a **large** area will float.

7. Match the words with the mixtures they separate:
- iron car parts in a junkyard: **large and small pieces of matter**
- salt water: **salt and water** (implied correct answer to separate mixtures)

(Note: The last item requires a specific separation; you might want to clarify which options to select for that part.)