Chemistry Crossword

2. The appearance of matter changes without changing the chemical composition
4. When two or more substances combine to form a new substance
7. Variables we keep constant throughout an experiement
8. The number of protons in an element found at the top of the periodic table tile
14. Data we colloect that discribes our senses
17. Elements in the periodic table are ordered by the number of...
18. The resulting substances of a chemical reaction
20. The law of _________________ of Mass
22. In a chemical reaction matter is neither created or destroyed, it is ______________
23. A hypothesis should include the sections which start with the words...
24. A reaction where something reacts with oxygen, burning or exploding when it does

1. When oxygen supply is restricted resulting in other reactions occuring instead
3. The symbol that represents an element on the periodic table
5. The three types of Matter
6. Data we collect by measuring something numerically
9. Anything that has weight and takes up space
10. When there is sufficiant oxygen to complete combustion
11. In a closed system, the mass of the reactants is equal to the mass of the _____________
12. A reaction that releases energy into the surroundings
13. The number that represents the total protons and neutrons in an atom
15. The measure of change in the variable you are testing
16. A variable that changes and that you test
19. This substance is always needed for combustion reactions to occur
21. The starting material of a chemical reaction