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10 Cards in this Set
- Front
- Back
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___ and ____ expand more than glass when heated.
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metals and plastics
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Why do roadways of bridges always have small gaps between them?
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To allow the bridge to expand in warm weather. These gaps are called expansion joints.
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Water, like other substances will contract when its temperature decreases until it reaches ____ deg. C.
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4 degrees Celsius
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What is the temperature of water at its maximum density?
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4 deg. C
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Why does water expand as it freezes?
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Water molecules form crystals as it freezes, and the crystals require more space between them.
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Why is the crystallization of water important to aquatic life in most climates?
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The frozen water which has crystals floats instead of sinking, allowing aquatic life to live under the frozen water.
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The __________ is a device that automatically regulates temperature.
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thermostat
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Most thermostats have a _____ strip which responds to temperature changes.
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bimetallic (two metal) strip
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What two metals are most bimetallic strips made of?
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steel and copper
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The first thermostat was constructed by ______.
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Drebbel
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