Answer the following questions. Encircle the letter that corresponds to the best
answer.
1. Which of the following is by definition "pure"
A. carbon dioxide
C. orange juice
B. sea water
D.wood
2. Sample of a mixture is in the liquid state. It is clear and does not exhibit the Tyndall
effect. This sample is heated and you observe that the liquid in the mixture evaporates.
living a white solid in the dish. How can you best describe the original sample of matter?
A. homogeneous mixture C. compound
B. solution
D. element
3. Consider the process described in number 2. How can you best describe the change
which took place?
A. chemical
C. homogeneous
B. physical
D. heterogeneous
4. Mixtures can be classified into two types, homogeneous and heterogeneous. They ore
different because...
A. heterogeneous has two substances while homogeneous has three or more
substances
B. homogeneous look the same throughout, while heterogeneous you can see the
different parts.
C. heterogeneous look the same throughout, while homogeneous you can see
the different parts
D. they are the same, just different names.
5. Which of the following is a homogeneous mixture?​