Across
- 6. the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction
- 10. it consists of all the organisms and the physical environment with which they interact
- 11. The process by which plants make energy using sunlight
Down
- 1. are organisms that break down dead or decaying organisms
- 2. A microbe that can use sugar to grow
- 3. The bottom level in the energy pyramid which usually consists of plants
- 4. the worldwide sum of all ecosystems
- 5. A living thing made up of one or more cells and able to carry on the activities of life
- 7. any organism that can't make its own food
- 8. plant or animal material used as fuel to produce electricity or heat
- 9. is any substance that has mass and takes up space by having volume
- 12. is the capacity for doing work (exist in potential, kinetic, thermal, or other forms)