1.A chemical change is different than a physical change because in a chemical change
a. Chemicals are used
b. Molecules do not physically touch
c. A new substance is formed and in a physical change no new substance is formed
d. The change can be seen but in a physical change it cannot
2.Which of the following is a physical change?
a. Burning
b. Freezing
c. Rusting
d. Oxidation
3.Jamal combined baking soda and vinegar, but he is having trouble determining if what he observed is a chemical reaction or a physical change. Choose two answers that demonstrate evidence of a chemical change?
a. Change in color
b. Absorption of heat
c. No change on properties
d. Formation of new substances
4. In a chemical reaction, if the reactants are heated, the reaction usually happens
a. Faster
b. Slower
c. At the same rate
d. In a smaller volume
Explain why your answer is correct:
