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 30. Remember to save your answers!

1. The planet Earth has been formed from the lava of volcanoes.
I cannot say.
That is correct.
That is incorrect.

2. The four layers of planet Earth are the crust, the mantle, the outer core and the inner core.
I cannot say.
That is correct.
That is incorrect.

3. Planet Earth is surrounded by a layer hydrogen.
I cannot say.
That is correct.
That is incorrect.

4. Attraction and magnetism are examples of contact forces.
I cannot say.
That is correct.
That is incorrect.

5. All movement is stable.
I cannot say.
That is correct.
That is incorrect.

6. Balance is influenced by the center of gravity and the .
I cannot say.
That is correct.
That is incorrect.

7. The Milky Way does not move through space.
I cannot say.
That is correct.
That is incorrect.

8. The seasons are caused by the changes in the distance between the Earth and the Sun.
I cannot say.
That is correct.
That is incorrect.

9. Only one side of the Moon is visible from the Earth.
I cannot say.
That is correct.
That is incorrect.

10. The solar system is held together by the Sun's attractive force.
I cannot say.
That is correct.
That is incorrect.

11. The planets of our solar system can be divided into rocky and gas planets.
I cannot say.
That is correct.
That is incorrect.

12. The four stars nearest to the Sun are also part of our solar system.
I cannot say.
That is correct.
That is incorrect.

13. Light can travel through empty space.
I cannot say.
That is correct.
That is incorrect.

14. Sound can travel through empty space.
I cannot say.
That is correct.
That is incorrect.

15. Quick vibrations produce high-pitched sounds.
I cannot say.
That is correct.
That is incorrect.