Across
- 3. science that deals with substances and chemical reactions
- 5. atomic number 17
- 10. the star in the centre of our universe
- 11. at rest or not moving
- 13. the study of organisms relations to one another
- 14. the smallest part of a substance that cant be broken down chemically
Down
- 1. a pathway which electricity goes through
- 2. expressed in ways other than numerical values
- 4. a natural environment which organisms live
- 6. these can be found on the periodic table of elements
- 7. the measurement on how tightly packed together a material is
- 8. the amount of space an object occupies
- 9. a force that pulls a body to the earth
- 12. positive particle