1) It is important to understand the difference between _______________ and ___________________
changes.
2)_______________ changes are usually about states and _________________ changes happen on a
molecular level.
3) When you have two or more molecules that interact do you get a physical change, or do you get a
chemical change? _______________
4) when you step on a can and ______________ it you have forced a __________________ change.
5) Explain to me why we only created a physical change to the can when we crushed it.
6) After you crush a can the _________________ in the can are still the same __________________.
No _________________ bonds were created or broken.
7) Can you find the H2O on the periodic table? __________
8) Is melting Ice a physical change or a chemical change? ____________________
9) Is freezing water in to Ice a physical change or a chemical change? ____________________
10) A change in __________________ and _____________ can cause a ________________ change in
the _____________ molecules.
11) Draw a picture of a physical change.
1) Do chemical changes happen on a large scale or small scale? _______________________
2) While some ________________ show obvious ______________ changes, such as a __________
change, most _____________ changes are not ________________.
3) The chemical change between as hydrogen peroxide becomes water can not be seen why? _______
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4) Because it is hard to see a reaction of H2O2 becoming water you might still see ______________
as evidence of the chemical change.
5) Melting a _____________________ cube is a _______________________ change because the
_______________________ is still _______________________.
6) If we burn the sugar is it a chemical change or a physical change? _____________________
7) __________________ will eventually _______________ when it is exposed to
_____________________ gas in the _______________.
8) You can watch the process of _________________ happen over a _______________ period of time.
9) What is the symbol for iron on the periodic table? __________
10) Draw a picture of the oxidation process.