Across
- 3. __ is what causes things to be pulled down, toward the center of the Earth.
- 4. Solar, hydroelectric, and wind are examples of __ energy
- 6. __ break down dead animals and return nutrients back into the soil for plants to use.
- 12. When the Earth __ around the Sun, that causes us to see different constellations throughout the year
- 14. When atoms combine with other atoms to form a new substance (2 words)
- 17. All energy in an ecosystem can be traced back to the __.
- 18. __ is all the living things on Earth
- 19. Has mass and takes up space
- 20. When two or more things are mixed together and they are not fully dissolved
Down
- 1. Stars vary greatly in size and __ from Earth.
- 2. In the water cycle, when water changes from liquid to gas
- 5. Coal and natural gas are examples of __ energy.
- 7. What is made when a solute is dissolved in a solvent.
- 8. __ is all the liquid water on Earth
- 9. When the Earth __, it causes patterns like day and night and changes in the length of our shadows.
- 10. __ is the process that plants create food from carbon dioxide, water, and sunlight.
- 11. things are made up of particles too small to see with your eyes true false
- 13. Large objects in space that give off heat and light.
- 15. Atoms can join with other atoms to form these
- 16. Single particles, like Hydrogen, Carbon, or Iron