bio

3. Tiny photosynthetic organisms that float in oceans and lakes and support aquatic food chains.
6. Organisms that obtain energy by eating other organisms.
7. A system where organisms interact with each other and with their physical environment.
9. The release of water vapor from plant leaves into the atmosphere.
11. Organisms that create their own food, usually through photosynthesis.
15. Tiny photosynthetic organisms that float in oceans and lakes and form the base of many aquatic food chains.
18. An organism that consumes dead organic material such as decaying plants and animals.
20. Organisms that cannot make their own food and must obtain energy by consuming other organisms.
21. The total mass of living organisms in a specific area or ecosystem.
22. Nonliving environmental factors such as sunlight, water, and temperature.
23. The process where water vapor cools and changes into liquid water, forming clouds.

1. Water that falls from the atmosphere to Earth as rain, snow, sleet, or hail.
2. Organisms that break down dead organisms and recycle nutrients back into the environment.
4. Living parts of an ecosystem like plants, animals, fungi, and bacteria.
5. An organism that obtains energy from chemical reactions instead of sunlight.
8. An organism that eats both plant and animal matter.
10. A process in the nitrogen cycle where bacteria convert nitrates back into nitrogen gas.
12. An organism that eats other animals for energy.
13. An organism that uses sunlight to produce its own food through photosynthesis.
14. The process organisms use to release energy from food, often producing carbon dioxide.
16. An organism that feeds only on plants.
17. The rate at which energy is produced by organisms in an ecosystem, usually through photosynthesis.
19. The process of liquid water turning into water vapor due to heat.