1.1 What is Chemistry?

http://www.ck12.org Chapter 2. Matter and Change

Lesson Review Questions

1. Compare and contrast the three states of matter. Try to describe similarities and differences apparent at a
   microscopic level as well as at the observable level between these states of matter.


2. Which of the following would be an example of a pure substance?

a. plastic

b. milk

c. 100% ethanol

d. cake flour

3. Which of the following would be an example of an element?

a. water

b. orange juice

c. steel

d. iron

4. Which of the following would be an example of a compound?

a. water

b. sulfur

c. aluminum

d. brass

5. Compare and contrast a pure substance with a mixture and give an example.


6. Which of the following statements is true?

a. The periodic table is a list of various compounds found throughout the world.

b. The periodic table is randomly organized.

c. The periodic table has been the same for 50 years.

d. The periodic table is an organized assembly of the various elements that have been discovered.

7. Classify the following as a homogeneous mixture, a heterogeneous mixture, or neither.

a. powdered sugar

b. mayonnaise

c. scrambled egg

d. air

e. soda pop

f. concrete

g. apple juice

h. glass

i. steel

j. copper

Further Reading / Supplemental Links

• Examples of laboratory techniques used for separating mixtures can be found at Science Park: http://scien
  cepark.etacude.com/projects/