Science LET Reviewer

1. All are evidence of a chemical change except?
a. Precipitate
b. reduction of weight
c. gas production
d. release of odor
2. When two chemicals are mixed, bubbles are produced. So, therefore there is ___?
a. gas production
b. color change
c. solubility
d. vaporization
3. Which of the following statements is true?
a. Changing the composition of the material is a physical change.
b. A change in a material that results in the creation of a new material is a chemical change.
c. Evidence for a physical change may include the presence of heat and light, change in color, gas production,or release of odor.
d. Bending an object is s chemical change.