Assessment 1 Directions: Mark a () if the statement is correct and (x) if incorrect. Write your answers on a separate sheet of paper.
1. Gases exert pressure.
2. Gas is a state of matter that has no fixed shape and no fixed volume.
3. Smoke and hot gases tend to go downwards. 4. Gases expand when heated and contract when cooled.
5. The densities of gases are relatively high compared to the densities of solids and liquids. 6. The force of intermolecular attraction between gas particles is negligible.
7. There is no limit to the amount of air that can be pumped into a bicycle tire.
8. Gases mix evenly and completely when contained in the same vessel.
9. Gases are difficult to compress when pressure is applied.
10. Cold air tends to go upwards.​