Across
- 2. A thin layer that controls what enters and leaves a cell
- 3. Having two different alleles for a trait
- 4. The body system that breaks down food into nutrients
- 10. Force equals mass times acceleration
- 13. When humans choose which organisms reproduce based on desired traits
- 14. The control center of a cell that contains DNA
- 18. Melted rock on Earths surface
- 19. A force involving electricity and magnetism
- 20. Having two identical alleles for a trait
- 21. The movement of Earths plates that shape the surface
- 22. The body system that brings in oxygen and removes carbon dioxide
- 26. An object stays at rest or in motion unless acted on by a force
Down
- 1. The process where organisms with helpful traits survive and reproduce more
- 5. Rock formed from compacted and cemented sediments
- 6. A trait that only shows when two copies are present
- 7. Rock formed from cooled magma or lava
- 8. Rock changed by heat and pressure
- 9. The part of plant cells that uses sunlight to make food
- 11. A trait that shows up when at least one copy is present
- 12. The thick layer of Earth beneath the crust
- 15. The genetic makeup of an organism
- 16. Melted rock beneath Earths surface
- 17. The force that pulls objects toward each other
- 23. The physical traits you can see in an organism
- 24. For every action there is an equal and opposite reaction
- 25. The part of a cell that releases energy from food