Across
- 7. a very tiny thing, sometimes too small to be seen
- 8. when one substance mixes with another and it looks like it disappears
- 9. anything that takes up space; can be in different forms
- 10. a test used to discover new information about a question
- 12. to pay close attention to something
- 13. a state of matter, such as water when you pour it
Down
- 1. a state of matter, such as water when it is ice
- 2. a state of matter, such as water when it is steam
- 3. a name for people in the past who studied the combination of chemicals
- 4. a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
- 5. information that can be used to support or reject an idea
- 6. the different forms of matter that include solid, liquid, and gas
- 7. something you can observe about an object or material
- 9. a combination of two or more things
- 11. a special kind of mixture where you cannot tell the different parts from each other