Gases

6. How hot or cold something is
8. Carbon _______________ is a gas that makes the bubbles in soda. The formula is CO2
9. Pressure is the ____________ of particles on a container
12. A gas that makes balloons float and has an atomic mass of 2
13. A gas we need to breathe to stay alive
14. When the volume of a gas decreases, the pressure _________________
17. A substance that does not have a fixed volume or shape
18. ____________ energy is the energy of an object in motion

1. A gas that is used to clean swimming pools and has an atomic mass of 35.45 on the periodic table
2. The amount of space air takes up
3. A gas that is number 7 on the periodic table
4. A small amount of matter, like an atom or molecule
5. A gas found in rock and soil and number 86 on the periodic table
7. The force of particles on the walls of a container
8. When temperature of a gas decreases, the speed of the atoms also _________
10. A gas that is in some light up signs and number 10 on the periodic table
11. How we measure very small particles like atoms and molecules
15. Anything that holds things inside it
16. A unit for pressure