CHEMISTRY
HOMEWORK 1a.
Name: _________________________________________
HOMEWORK RULES: *NAME on each page; *STAPLE multiple pages together;
*NO RAGGED EDGES; *SHOW WORK for computations
1._Label each as a solid, liquid, or gas (at room temperature):
a. milk
d. wood
b. salt
e. air
c. ketchup
f. gasoline
2. Identify each of the following as either a physical or chemical property:
a. Diamond is very hard
b. The boiling point of ethyl alcohol is 78oC
c. Sugar ferments to form ethyl alcohol
d. A copper wire conducts electricity
e. Sulfur is yellow
f. Sulfur is brittle
3. Identify each of the following as either an element, compound, homogeneous mixture, or
heterogeneous mixture:
a. Italian-style salad dressing
d. P2O5
b. mercury
e. table salt
c. hot tea (plain)
f. the sea water off Cape Cod
4. Look at the cartoon on the reverse side. The young boy, Pasquale, has an idea.
Below the cartoon, explain why Pasquale’s idea does or does not qualify as a scientific hypothesis.