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What measurement of the wave is used to determine the magnitude of an earthquake?
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What measurement is used to describe the amount of water vapor in the air?
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What may the jointed appendages of arthropods be used for?
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What may have developed to help our ancestors distinguish between ripe and unripe fruits?
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What may be the ancestor of placental mammals?
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What may be lost when waves travel through matter, but not when they travel through space?
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What material used for helium-filled balloons is dense, strong and opaque, with a high molecular mass that forms films that have many fewer pores than rubber?
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Jan 7
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550
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What material is transported in a process called longshore drift?
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What material is regularly used in human hip and knee implants?
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What material comprises the sun and other stars, as well as lightning and the northern lights?
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250
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What map shows the locations of several genes on the x chromosome?
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What man-made substance tends to break down ozone in the stratosphere?
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What man-made structures orbit all of the inner planets as well as jupiter and saturn?
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What man-made devices in space are used to observe the earth's surface?
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What mammalian structure allows the exchange of gases, nutrients, and other substances between the fetus and mother?
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MeriVasser1
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470
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What mammalian feature serves functions such as filtration and keeping the body warm?
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500
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What mammalian class has the greatest ability to learn?
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AlishaCorone
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300
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What mammal is the most intelligent?
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Jan 7
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What mammal is often a pollinator of nocturnal flowers?
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What makes water change to a different state?
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