Q: When water goes above and below its freezing point, what rock-breaking phenomenon is common? Read this paragraph and choose the correct option from the provided answers: Rocks can break apart into smaller pieces in many ways. Ice wedging is common where water goes above and below its freezing point ( Figure below ). This can happen in winter in the mid-latitudes or in colder climates in summer. Ice wedging is common in mountainous regions like the Sierra Nevada pictured above. Choices: - ice locking - ice inverting - ice crushing - ice wedging A:
ice wedging
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Q: What is the term used to measure the intensity of sound waves? Read this paragraph and choose the correct option from the provided answers: Loudness refers to how loud or soft a sound seems to a listener. The loudness of sound is determined, in turn, by the intensity, or amount of energy, in sound waves. The unit of intensity is the decibel (dB). Choices: - amplitude - phon - hertz - decibel A:
decibel
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Q: What are the glands that secrete milk in a woman's breasts? Read this paragraph and choose the correct option from the provided answers: The breasts are not directly involved in reproduction, but they nourish a baby after birth. Each breast contains mammary glands , which secrete milk. The milk drains into ducts leading to the nipple. A suckling baby squeezes the milk out of the ducts and through the nipple. Choices: - primordial glands - pituitary glands - lactic acids - mammary glands A:
mammary glands
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Q: Birds have light-weight bones that are filled with what? Read this paragraph and choose the correct option from the provided answers: Birds have light-weight bones that are filled with air. They also lack a jaw, which in many vertebrates is a dense, heavy bone with many teeth. Instead, birds have a light-weight keratin beak without teeth. Choices: - water - proteins - blood - air A:
air
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