Across
- 2. is the part of an experiment that is NOT being tested and that is used for comparison.
- 6. The first step of the scientific method is to identify the
- 10. a group of atoms chemically bonded together representing the smallest unit of a chemical compound
- 11. the element that is found in all four of the Earth's systems
- 12. The information collected during an experiment is called
- 13. physical and chemical characteristics of matter
- 15. variable is the part of the experiment that is affected by the changed variable
- 17. how much space the matter occupies
- 18. combination of letters used to indicate the chemical composition of a substance
- 19. Scientists make _______________________ (using their senses) to help them make a
- 20. a pure substance that cannot be broken down into any other substance
- 21. the smallest particle of an element maintaining the chemical identity of that element
Down
- 1. shorthand that uses one or two letters to represent elements
- 3. made of a blend of elements or compounds; not a pure substance
- 4. credited with organizing elements into a table based on properties
- 5. type of substance has constant composition and constant properties
- 7. the ratio or distribution of individual substances that make up matter
- 8. is a possible solution to a problem. It is always testable
- 9. the measure of how much matter is in a substance
- 10. anything that has mass and takes up space
- 14. variable is the part of the experiment that is being tested and changed by the scientist
- 16. a pure substance that has been chemically bonded to form a new substance