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: