Across
- 1. Helium Balloons rise because the gas inside is ___ than air.
- 5. When two or more chemicals combine they form a ___?
- 6. When combined with baking soda, releases oxygen and energy in an "explosive" reaction
- 7. A common household acid that is very sour to the taste and safe to eat
- 8. The study of the elements and what the universe is made of
- 10. When mixed with an acid, becomes neutralized
- 12. This is the most abundant element on Earth
- 14. Your favorite Main Lesson teacher this year
- 17. An area of study that leads to experiments and discovery
- 18. The phase of matter is always in a state of reaction, like the stars
- 19. A state of matter that is very fluid and flexible
- 20. Everything is made from this
Down
- 2. How much "atomic weight" an element has how "heavy" it is.
- 3. This mixture of pollen and bee saliva is very dense
- 4. Heavier objects sink because they are___?
- 9. Able to mix
- 11. This is the most abundant element in the universe
- 13. Every physical thing
- 15. This phase of matter is rigid and firm
- 16. Air is an example of this state of matter
- 17. When acids and bases combine they produce ___?