Ecosystems

3. All the water found on Earth
4. All the different populations living in the same area
5. Means “non-living”
8. A model that describes how energy in an ecosystem is transferred through two or more food chains
11. A system that is made up of all the interacting biotic and abiotic parts of a certain place
12. The process used by all organisms to release the energy stored in food and use it for body functions
13. Any living thing that gets the energy it needs by making its own food
14. The layer of gases that surround the planet
16. Earth’s solid outer layer
17. All the individuals of a species that live in the same area
18. Any living thing that gets the energy it needs by eating
20. A branch of science that studies the relationships between living things and the environment

1. Represents the energy flow through trophic levels
2. Means “based mostly or totally on water”
6. A feeding level within an ecosystem
7. A model that describes how the energy that is stored in food is transferred from one living thing to another
9. The process used by producers to convert light energy from the Sun into chemical energy in food
10. Means “based mostly or totally on land”
15. All the places on Earth where life can exist
19. Means “living”