science crossword

2. web a complex system that shows how different organisms in an ecosystem are connected through what they eat
3. organisms that make their own food
5. breaks down dead organisms
9. a moon you cant see
11. arranging the organisms into groups
14. living organisms
15. a home for organisms
17. an invisibe force that keeps us on the ground

1. food chain is a series of organisms each dependent on the next as a source of food.
4. moon when you see all of the moon
6. eats both plants and animals
7. the opposite of a pull
8. we drink it and swim in it
10. when the earth ,moon and sun
12. non-living
13. when particals don't move
16. the rotation that the earth does around the sun