Name: Class: Date:
IGC Chapter 1 Free Response
1. What is the name and symbol for the SI unit of length?
ANSWER: meter, m
2. Give the symbol and numerical meaning for the prefix micro-.
ANSWER: μ, 106
3. How many significant digits are in the following value? 156.100
ANSWER: six
4. Solve the following problem and round the answer to the correct number of
significant digits.
ANSWER: 0.010
5. The average life expectancy in the United States is 78.7 years. Given that there are
365.25 days in a year, exactly 24 hours in a day, exactly 60 minutes in an hour, and
exactly 60 seconds in a minute, calculate the number of minutes that the average
American lives.
ANSWER: 4.14 × 107 min
6. Standard-sized dice that are used in games and gambling are approximately cubic
in shape and 16 mm in length on each side. Given that there are exactly 10 mm in 1
cm, calculate the volume of a die in units of cubic centimeters. Assume that the die is
completely cubic in shape.
ANSWER: 4.1 cm3
7. Cooking oil has a density of 0.92 g/mL. Calculate the mass of a teaspoon of
cooking oil, which is equivalent to 4.93 mL.
ANSWER: 4.5 g
8. When added to water, octane will form a layer on the surface of the water. Iron will
sink when added to water. Rank the densities of these substances from lowest to
highest.
ANSWER: octane < water < iron
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,Name: Class: Date:
IGC Chapter 1 Free Response
9. Helium's boiling point is 4.222 K. Calculate helium's boiling point in degrees
Fahrenheit.
ANSWER: –452.07 °F
10. The lowest recorded temperature on Earth was –89.2 °C at the Soviet Vostok
Station in Antarctica in 1983. Calculate this temperature in degrees Fahrenheit.
ANSWER: –128.6 °F
11. Crater Lake in Oregon is approximately 9.7 km long and 8.0 km wide, and has an
average depth of 350 m. Assuming that the lake has the three-dimensional shape of a
rectangular prism, calculate the volume of Crater Lake and round the answer to the
correct number of significant figures.
ANSWER: 27 km3
12. The surface area of the Caspian Sea is approximately 1.4 × 105 square miles.
Given that there are 1.609 km in one mile, calculate the surface area of the Caspian
Sea in square meters and round the answer to the correct number of significant
figures.
ANSWER: 3.6 × 1011 m2
Multiple Choice
1. Select the pure substance.
a. air (a mixture of nitrogen and oxygen)
b. seawater (water with dissolved salts)
c. water (a compound of hydrogen and oxygen)
d. brass (a mixture of copper and zinc)
ANSWER: c
2. Which are considered pure substances?
a. elements only
b. compounds only
c. elements and compounds
d. elements, compounds, and homogeneous mixtures
e. elements, compounds, homogeneous mixtures, and heterogeneous mixtures
ANSWER: c
3. Select the true statement.
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,Name: Class: Date:
IGC Chapter 1 Free Response
a. All compounds are mixtures.
b. Only elements are pure substances.
c. Pure substances cannot consist of more than one type of element.
d. A compound consists of two or more elements.
ANSWER: d
4. Suppose you have two different brands of baking powder that are each uniform
throughout. However, the labels show that one brand has a higher sodium content
than the other. Classify baking powder.
a. element
b. compound
c. homogeneous mixture
d. heterogeneous mixture
ANSWER: c
5. In a cup, there is orange juice containing pulp and a few ice cubes. Which choice
best describes the contents of the cup?
a. element
b. compound
c. homogeneous mixture
d. heterogeneous mixture
ANSWER: d
6. Select the chemical property.
a. color
b. melting point
c. flammability
d. density
e. conductivity
ANSWER: c
7. Select the extensive property.
a. volume
b. density
c. color
d. freezing point
ANSWER: a
8. Select the chemical change.
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, Name: Class: Date:
IGC Chapter 1 Free Response
a. ice melting
b. crushing an aluminum can
c. breaking glass
d. water condensing on a cool glass
e. burning wood
ANSWER: e
9. A sample of potassium explodes when dropped into a swimming pool. This
property is
a. extensive and physical.
b. extensive and chemical.
c. intensive and chemical.
d. intensive and physical.
ANSWER: c
10. Select the choice that is not an example of energy.
a. a beam of light
b. a loud noise
c. an atom
d. heat from a fire
e. radiation from a microwave oven
ANSWER: c
11. A log burns in a fireplace. Which choice best describes the energy conversion?
a. Potential energy is converted to nuclear energy.
b. Matter is converted to potential energy.
c. Kinetic energy is converted to electrical energy.
d. Nuclear energy is converted to heat energy.
e. Chemical energy is converted to heat energy.
ANSWER: e
12. Select the correct sequence of events in the scientific method.
a. hypothesis → observation → experiment → theory → scientific law
b. theory → observation → scientific law
c. observation → hypothesis → experiment → theory → scientific law
d. hypothesis → experiment → theory → scientific law
e. observation → hypothesis → experiment → theory
ANSWER: e
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IGC Chapter 1 Free Response
1. What is the name and symbol for the SI unit of length?
ANSWER: meter, m
2. Give the symbol and numerical meaning for the prefix micro-.
ANSWER: μ, 106
3. How many significant digits are in the following value? 156.100
ANSWER: six
4. Solve the following problem and round the answer to the correct number of
significant digits.
ANSWER: 0.010
5. The average life expectancy in the United States is 78.7 years. Given that there are
365.25 days in a year, exactly 24 hours in a day, exactly 60 minutes in an hour, and
exactly 60 seconds in a minute, calculate the number of minutes that the average
American lives.
ANSWER: 4.14 × 107 min
6. Standard-sized dice that are used in games and gambling are approximately cubic
in shape and 16 mm in length on each side. Given that there are exactly 10 mm in 1
cm, calculate the volume of a die in units of cubic centimeters. Assume that the die is
completely cubic in shape.
ANSWER: 4.1 cm3
7. Cooking oil has a density of 0.92 g/mL. Calculate the mass of a teaspoon of
cooking oil, which is equivalent to 4.93 mL.
ANSWER: 4.5 g
8. When added to water, octane will form a layer on the surface of the water. Iron will
sink when added to water. Rank the densities of these substances from lowest to
highest.
ANSWER: octane < water < iron
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,Name: Class: Date:
IGC Chapter 1 Free Response
9. Helium's boiling point is 4.222 K. Calculate helium's boiling point in degrees
Fahrenheit.
ANSWER: –452.07 °F
10. The lowest recorded temperature on Earth was –89.2 °C at the Soviet Vostok
Station in Antarctica in 1983. Calculate this temperature in degrees Fahrenheit.
ANSWER: –128.6 °F
11. Crater Lake in Oregon is approximately 9.7 km long and 8.0 km wide, and has an
average depth of 350 m. Assuming that the lake has the three-dimensional shape of a
rectangular prism, calculate the volume of Crater Lake and round the answer to the
correct number of significant figures.
ANSWER: 27 km3
12. The surface area of the Caspian Sea is approximately 1.4 × 105 square miles.
Given that there are 1.609 km in one mile, calculate the surface area of the Caspian
Sea in square meters and round the answer to the correct number of significant
figures.
ANSWER: 3.6 × 1011 m2
Multiple Choice
1. Select the pure substance.
a. air (a mixture of nitrogen and oxygen)
b. seawater (water with dissolved salts)
c. water (a compound of hydrogen and oxygen)
d. brass (a mixture of copper and zinc)
ANSWER: c
2. Which are considered pure substances?
a. elements only
b. compounds only
c. elements and compounds
d. elements, compounds, and homogeneous mixtures
e. elements, compounds, homogeneous mixtures, and heterogeneous mixtures
ANSWER: c
3. Select the true statement.
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,Name: Class: Date:
IGC Chapter 1 Free Response
a. All compounds are mixtures.
b. Only elements are pure substances.
c. Pure substances cannot consist of more than one type of element.
d. A compound consists of two or more elements.
ANSWER: d
4. Suppose you have two different brands of baking powder that are each uniform
throughout. However, the labels show that one brand has a higher sodium content
than the other. Classify baking powder.
a. element
b. compound
c. homogeneous mixture
d. heterogeneous mixture
ANSWER: c
5. In a cup, there is orange juice containing pulp and a few ice cubes. Which choice
best describes the contents of the cup?
a. element
b. compound
c. homogeneous mixture
d. heterogeneous mixture
ANSWER: d
6. Select the chemical property.
a. color
b. melting point
c. flammability
d. density
e. conductivity
ANSWER: c
7. Select the extensive property.
a. volume
b. density
c. color
d. freezing point
ANSWER: a
8. Select the chemical change.
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, Name: Class: Date:
IGC Chapter 1 Free Response
a. ice melting
b. crushing an aluminum can
c. breaking glass
d. water condensing on a cool glass
e. burning wood
ANSWER: e
9. A sample of potassium explodes when dropped into a swimming pool. This
property is
a. extensive and physical.
b. extensive and chemical.
c. intensive and chemical.
d. intensive and physical.
ANSWER: c
10. Select the choice that is not an example of energy.
a. a beam of light
b. a loud noise
c. an atom
d. heat from a fire
e. radiation from a microwave oven
ANSWER: c
11. A log burns in a fireplace. Which choice best describes the energy conversion?
a. Potential energy is converted to nuclear energy.
b. Matter is converted to potential energy.
c. Kinetic energy is converted to electrical energy.
d. Nuclear energy is converted to heat energy.
e. Chemical energy is converted to heat energy.
ANSWER: e
12. Select the correct sequence of events in the scientific method.
a. hypothesis → observation → experiment → theory → scientific law
b. theory → observation → scientific law
c. observation → hypothesis → experiment → theory → scientific law
d. hypothesis → experiment → theory → scientific law
e. observation → hypothesis → experiment → theory
ANSWER: e
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