Use the photo to answer Questions 6 and 7. 6. Two metal samples are each placed in a beaker
containing the same solution. What evidence
indicates that a chemical reaction is taking place
in one of the beakers? Circle all that apply.
A. A gas is being given off.
B. There is a change in color.
C. The solution is clear and colorless.
D. Bubbles are forming.
- 20 ml
-60
40
- 20
7. Based on what you observe in the beakers, which
of the following statements is true?
A. Chemical reactions can always be seen.
B. The two samples of metal are different substances.
C. Chemical reactions are unpredictable.
D. New substances are formed in each beaker.