Vocabulary

2. The movement of particles from an area of high concentration to low concentration.
6. Cell ___________ The thin outer layer of a cell that controls what goes in and out.
8. When a plant grows toward light.
10. Something that causes a reaction or change in an organism.
11. A type of nutrient, like sugar or starch, that gives the body energy.
13. The basic building block of all living things
15. When a plant reacts to touch, like vines wrapping around objects.

1. The control center of a cell that contains the genetic material (DNA).
3. When a plant grows in response to gravity.
4. The movement of water through a membrane from a less concentrated solution to a more concentrated one.
5. The system that moves blood around the body.
7. System The system that sends signals through the body to control actions and responses.
9. The system of bones that supports and protects the body.
12. The system that helps you breathe, bringing oxygen into the body.
14. A type of fat found in the body that stores energy.