Q: What is a common age-related bone disease in which bone density and strength is decreased? Choices: - fibrosis - lupus - arthritis - osteoporosis A:
osteoporosis
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Q: In science, what is defined as a change in position? Choices: - gravity - speed - direction - motion A:
motion
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Q: Does climate change have a positive or negative effect on reproductive success? Choices: - neither - positive - both - negative A:
negative
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Q: Radiation can be absorbed or shielded by materials, particularly what material used to make protective aprons worn by x-ray administrators? Choices: - cotton - steel - carbon - lead A:
lead
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