Across
- 2. crucial liquid in the environment and our bodies, needs to be clean
- 3. all of the stars and galaxies, beginning of everything
- 5. mountains, plate tectonics, layers of the earth, study of the planet
- 7. how organisms interact with each other to survive, food chains and energy transfer
Down
- 1. what surrounds the earth and where weather happens
- 4. what we all need to survive, renewable and nonrenewable sources
- 6. change in organisms over a long period of time