Name / Date
Grade / Cluster
I-Choose the best answer:
1. Three examples of physical changes are ______.
A. / Freezing of water, evaporation of gasoline, and rusting of a nailB. / Boiling of water, bursting of a balloon, and melting of a candle
C. / Sawing of wood, crushing of a can, and toasting a marshmallow
D. / Burning of gasoline, rotting of an egg, and exploding of fireworks
2. The color of ink is a ______.
A. / Chemical propertyB. / Chemical change
C. / Physical property
D. / Physical change
3. When two or more substances are combined so that each substance maintains its own properties, the result is a(n)
A. / Chemical changeB. / Compound
C. / Mixture
D. / Element
4. When gasoline is burned in an engine, ______.
A. / gasoline evaporatesB. / Mass is lost
C. / New substances are formed
D. / Mass is gained
5. ______is another name for a homogeneous mixture
A. / SuspensionB. / Solution
C. / Compound
D. / element
II- Classify:
1. Classify each of the following as a physical or chemical property of sulfur.
a. Its density is 2.97 g/cm3.
b. It reacts with hydrogen to form a gas.
c. It is a yellow solid.
d. Its melting point is 112°C.
e. It combines with oxygen.
2. Classify each of the following as a physical or chemical property of phosphorus.
a. It is a white, waxy solid.
b. It burns in air.
c. Its melting point is 44.1°C.
d. It has a density of 1.82 g/cm3.
e. Its boiling point is 280.3°C.
3. Classify the following changes as chemical or physical changes:
a. Bending a metal rod
Physical change / Chemical changeb. Burning wood
c. Breaking glass
d. Painting wood
e. Cooking
f. Burning propane
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II- Answer the following question(s):
6. How could you separate a mixture of sand and sugar?
7. What are some ways chemical and physical changes affect Earth’s surface?
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