1. an inch, a mile, a pound and a gallon are standard units of measurement
TRANSCRIPT
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Chapter 9Lesson 2
Measurement
Pages 236-241
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1. An inch, a mile, a pound and a gallon are standard units of
measurement.
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2. A system of measurement that is based on units of 10 is
the metric system.
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3. An object’s width is the number of units that fit across.
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4. Any measurement made in square units, such as square
centimeters, is a measurement of area.
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5. The comparison of an object’s mass to its volume describes
density.
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6. To find the density of an object divide its mass by its
volume.
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7. An object floats when its density is less than the density of the liquid or gas into which it
is placed.
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8. Heated air becomes less dense; cooler, denser air forces it
upward.
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9. The density of water is 1 g/cm³ while the density of cork
is 0.24 g/cm³.
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10. The density of an object affects its buoyancy.
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11. The measure of the pull of gravity from a planet on the
mass of an object describes an object’s weight.
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12. Ounces and pounds are the English units for weight, and the newton (N) is the metric unit for
weight.
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13. An object’s weight changes with gravity, but its mass stays
the same.300 pounds on Earth!
50 pounds on the moon!
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14. Do you think that if a marshmallow and a marble are the same size, they would have
the same mass, density, buoyancy, or volume?
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14. I think they would have the same volume. If they’re the same size, they take up the same space. The marble has more mass and more density than the marshmallow. Also, I know a marble does not have
buoyancy.