Science Olympics Brain Quiz

5. a substance that cannot be broken down into simpler substances by chemical means - composed of atoms
10. light bouncing off of an object
11. rock rocks that form from cooling magma (lava)
15. organism that eats both plants and other animals
16. the process by which plants make food
18. a neutral atomic particle
20. any of a group of cold-blooded air-breathing vertebrates that usually lay eggs and have skin covered with scales or bony plates
21. threatened with extinction
23. an elementary particle that has a negative charge of electricity and travels around the nucleus of an atom
25. the smallest particle of an element that has the properties of the element and can exist either alone or in combination

1. a plant or animal that requires complex organic compounds for food which it obtains by preying on other living things or eating particles of organic matter
2. any organism that is able to live both on land and in water; a class of cold-blooded vertebrate animals
3. an animal adaptation in which the organism appears to blends in with its surroundings
4. plant-eating animal
6. a substance changing from a gaseous state into a liquid state
7. the bending of light as it goes through an object
8. the complete path of an electric current
9. an influence (as a push or pull) that tends to produce a change in the speed or direction of motion of something
12. a major type of ecological community
13. a living thing (as a green plant) that makes its own food
14. a form of matter that takes the shape of its container and flows easily
17. a form of matter in which the molecules are tightly packed together, it does not flow or take the shape of its container
19. all things are made up of this
21. a system made up of an ecological community of living things interacting with their environment especially under natural conditions
22. animal that no longer exists
24. natural power exerted with force/ the capacity (as of heat, light, or running water) for doing work