Across
- 4. it travels in a straight line
- 5. scientists make sure they only change one variable in all experiments
- 7. you may be in your tea/coffee
- 9. plants inhale this
Down
- 1. the control center off the cells
- 2. it cauese heat in ou body and it also has something to do with our breathing
- 3. it is how plants grow
- 6. it is a green stain that comes from grass
- 8. we drink it
- 10. we breath it out