7th grade science

3. System – Works with bones to move the body.
6. System – Breaks down food into nutrients the body can use.
8. – A storage area in cells, often holding water, nutrients, or waste.
9. Wall – A stiff outer layer in plant cells that gives shape and support.
10. – The smallest unit of life that can carry out all life processes.
11. – The “powerhouse” of the cell; releases energy from food.
13. System – Removes waste from the body.
14. (Deoxyribonucleic Acid) – The molecule that carries genetic information.
16. – A characteristic or feature of an organism (like eye color or height).
18. System – Brings oxygen into the body and removes carbon dioxide.
19. – The control center of the cell that contains DNA.
21. System – Sends and receives signals to control body activities.

1. Trait – A trait developed during life, not passed on genetically.
2. Membrane – A thin barrier that controls what enters and leaves the cell.
4. Theory – The idea that all living things are made of cells, cells are the basic units of life, and all cells come from other cells.
5. System – Supports the body and protects organs.
7. Trait – A trait passed from parents to offspring through genes.
9. – The part of a plant cell that captures sunlight to make food (photosynthesis).
12. – A jelly-like substance inside the cell that holds organelles.
15. – Small parts inside a cell that each have a specific job.
17. System – Transports blood, oxygen, and nutrients throughout the body.
20. – A section of DNA that controls a specific trait.
22. System – A group of organs that work together to perform a body function.