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7th Grade Science

T.C. After School
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Across
1
Organ located in the upper chest, just behind the sternum.
3
Chemical messages that are produced by endocrine glands.
7
Small tubes that release hormones.
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The inner ear contains the:
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Repeated echos.
10
Amount of energy a wave carries past a certain area each second.
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Organ that produces estrogen and progesterone.
Down
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Organs that produce testosterone.
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Human perception of the intensity of sound.
4
Measure of the energy released by an earthquake.
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Process of locating objects by bouncing sounds off of them.
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Human perception of the frequency of sound.
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Bits of rock or solidified lava dropped from the air.
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Magma that flows onto Earth's surface.