Answer the following questions to the best of your ability.

If you are right, you get 2 points. A wrong choice takes away 2 points. Not answering gives you 0 points. The maximum amount of points is 20. Remember to save your answers!

1. Matter has two natural states: solid and non-solid.
I cannot say.
That is correct.
That is incorrect.

2. State changes include solidification, melting, evaporation and condensation.
I cannot say.
That is correct.
That is incorrect.

3. Many substances can dissolve in water.
I cannot say.
That is correct.
That is incorrect.

4. Water has a weak and random surface tension.
I cannot say.
That is correct.
That is incorrect.

5. A substance that is less dense than water floats.
I cannot say.
That is correct.
That is incorrect.

6. Wood is a raw material that decomposes quickly in nature.
I cannot say.
That is correct.
That is incorrect.

7. Wool is a type of animal fiber.
I cannot say.
That is correct.
That is incorrect.

8. Ancient coral reefs have formed the limestone cliffs of today.
I cannot say.
That is correct.
That is incorrect.

9. Coal comes from ancient marine organisms.
I cannot say.
That is correct.
That is incorrect.

10. Glass is made by melting sand.
I cannot say.
That is correct.
That is incorrect.