| A | B |
|---|
| atmosphere | the layers of gases surrounding the Earth |
| climate | the average weather conditions in a part of the world |
| compress | to reduce in volume by applying pressure |
| concentrated | a solution containing a lot of solute |
| concentration | the ratio of solute to solvent in a solution |
| condensation | the change of state from gas to liquid |
| dilute | a solution containing little solute |
| energy | the ability to makes things happen; can be in a number of forms such as heat, light, thermal |
| fossil fuels | the preserved remains of organims that lived long ago and changed into oil, coal or natural gas |
| freezing | the change os state form liquid to solid/0 degrees C or 32 degrees F |
| herbicide | a poison intended to kill plants |
| nitrogen | a colorless, odorless gas that makes up 78% of Earth's atmosphere |
| oxygen | A odorless , colorless gas that makes up 21% of the Earth's air |
| ratio | the comparison of two or more parts of a whole |
| water vapor | water in its gas state |
