| A | B |
|---|
| Moon | a bright object in the sky at night which changes its shape in a recognized pattern |
| stars | natural objects in the sky that give off light; the Sun is the star closest to Earth |
| Sun | the star closest to Earth; it is the source of Earth's heat and light |
| sunrise | the time of day when the Sun is first visible in the east |
| sunset | the time of day when the Sun is no longer visible in the west |
| recycle | to use old materials to make new things; you can recycle metal, plastic, and paper to make other things |
| reduce | to use a smaller amount of things or products |
| reuse | a product or thing that can be used over and over |
| weather | is what the outside is like at a certain time and place |
| atmosphere | the layer of air that surrounds Earth |
| minerals | a basic Earth material; a rock ingredient that cannot be physically broken down any further |
| rocks | an Earth material made up of different ingredients called minerals |
| soil | the loose material in which plants can grow in the upper layer of Earth |
| water | a natural liquid material made up of hydrogen and oxygen |
| deposition | the dropping of eroded soil and rock pieces in a new place |
| erosion | movement of Earth materials by water, wind, or ice |
| weathering | the process by which rocks are broken down into smaller pieces |
| climate | the average temperature and rainfall of an area over many years |
