Across
- 4. the outside layer of the cell lets things in and out
- 9. when molecules are distributed evenly through a space _________ has been reached
- 10. moves out waste products
- 11. provides the cell with protein
- 12. ________ is when a particle is too large to exit the cell s the material fuses with the cell membrane and is released
- 14. cell membranes are ______ _____ which means they will let some materials into the cell while keeping others out
- 15. directs all the activities that happen in the cell
- 18. gives the cell energy and food molecules
- 19. chromosomes- holds the DNA tells the cell information
- 20. ______ respiration occurs when oxygen levels are low
- 25. producers make their own food by changing energy from the sun into a sugar form carbon dioxide (CO2) the cell process is called _____________
- 26. organisms that cannot make their own food like humans are called ________
Down
- 1. _________ ________ is when a cell uses no energy to move particles in and out of the cell
- 2. controls what happens in the nucleus
- 3. the total of all chemical activities of an organism that enable it to stay alive grow and reproduce is called _____________
- 5. supplies the cell with a lot of water
- 6. lets things in and out of the nucleus
- 7. organisms that make their own food like plants are called ________
- 8. when molecules move from areas of high concentration to areas of low concentration this process is called ___________
- 9. moves materials from the nucleus to the cell membrane
- 13. when producers or consumers break down food in their cells to release usable energy this process is called __________
- 16. contains chlorophyll which helps the plant make its own food
- 17. supplies the cell with water
- 20. ________ respiration occurs when oxygen is present
- 21. ________ is when a particle is too large to enter through active or passive transport so the cell “engulfs” the material
- 22. a gel-like substance that moves things around the cell
- 23. transport _________ _________ is when materials need energy to help them move through a cell membrane
- 24. the diffusion of water through a cell membrane is called ________