Science 2

2. - The basic unit of matter.
6. The process plants use to make food from sunlight.
7. A gas that humans need to breathe.
10. A push or pull on an object.
13. - The smallest unit of life.
14. The control center of a cell containing DNA.
15. The state of the atmosphere at a specific time and place.
16. A small arthropod animal with six legs and usually wings.
17. A celestial body that orbits a star.
18. The green pigment in plants that helps with photosynthesis.
19. A relationship between two different species where both benefit.
22. Particles of soil and rock that settle at the bottom of water bodies.
23. A cold-blooded vertebrate animal that lays eggs, like snakes and lizards.
24. Practices to maintain health and prevent disease, especially through cleanliness.
26. A path through which electricity flows.

1. An aquatic animal with a hard shell, such as crabs and lobsters.
2. A community of living organisms and their environment.
3. The force that pulls objects toward each other.
4. Relating to the system that breaks down food in the body.
5. Two or more atoms bonded together.
6. An instrument used to observe distant objects in space.
8. Remains of ancient plants or animals.
9. A group of similar organisms that can breed together.
11. Microscopic single-celled organisms, some of which can cause disease.
12. The natural home of an organism.
16. Related to the sun's energy or light.
20. An opening in the Earth's crust that can erupt with lava.
21. The ability to do work or cause change.
24. A layer in the Earth's atmosphere that protects us from harmful UV rays.
25. An object that attracts iron and produces a magnetic field.