Science 7th Grade Review
Across
- 2. a type of mixture that you CANNOT tell apart
- 6. a type of mixture that you CAN tell apart
- 7. meteorologist study the _______________
- 10. is the prefix that stands for life
- 13. is the prefix that stands for earth/rocks
- 16. system that transport oxygen, nutrients, hormones via blood cells
- 17. two or more elements combined
- 19. smallest unit of matter
- 20. sub-particles that have a negative charge
- 21. sub-particles that have a neutral charge
- 22. system where food is broken down, nutrients are absorbed, and waste is eliminated
- 23. sub-particles that have a positive charge
Down
- 1. a type of pathogen that CANNOT live without a HOST
- 3. was the profession of Alfred Wegener
- 4. system that removes liquid and gas waste
- 5. smallest living thing
- 8. type of boundary where plates collide
- 9. prevents the entry of food into the lungs by closing the trachea (windpipe)
- 11. system helps different parts of the body communicate with each other
- 12. system that protects the body from pathogens
- 14. type of plate boundary where plates slide past each other
- 15. another word for man made materials
- 18. system that exchanges gases like CO2 and O2