| Term | Definition |
| water cycle | continuous movement of water between Earth's surface and the air (liquid to gas to liquid) |
| weather | the current state of the atmosphere with respect to heat or cold, wetness or dryness, etc. |
| climate | average weather at a place over a period of years |
| temperature | measure of how hot or cold something is |
| evaporation | changing from a liquid to a gas |
| condensation | changing from a gas to a liquid |
| precipitation | water in the atmosphere that falls to the Earth as rain, snow, sleet, or hail |
| estimate | to find an answer that's close to the exact amount |
| reasonable | not extreme |
| zero property | states that the product of 0 and any number is 0 |
| commutative property | states that when the order of two factors or addends is changes; the product or sum is still the same |
| associative property | states that you can group addends or factors differently and stil get the same answer |
| identity property | states that when you multiply one by any number, the answer is that number |
| distributive property | states that numbers can be broken into smaller numbers for calculating |
| coordinate grid | evenly divided and equally spaced squares on a flat surface |