Chapter 15 Resource: Support, Movement, and Responses

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Name Date ClassLaboratory Activity 2 (continued)Hands-On ActivitiesData and ObservationsTable 1LiquidWaterVinegarHypothesisResultsHydrogen peroxideOriginal Observations of bone hardness:Table 2Liquid Observations (after 10 min) Observations (after 48–72 h)WaterVinegarHydrogenperoxideTable 2Questions and Conclusions1. What liquids removed calcium from bone?Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.14 Support, Movement, and Responses
Name Date ClassLaboratory Activity 2 (continued)2. How accurate were your hypotheses for the effects of each liquid?3. A baby’s bones are softer than a teenager’s. What might be a reason for this?Hands-On Activities4. Some older persons suffer from a disease called osteoporosis, which results from calcium lossin bones. The bones weaken and are more likely to break. One way to help prevent osteoporosisis to eat calcium-rich foods. What foods could you eat to obtain more calcium?Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.5. Scientists have discovered that astronauts lose bone calcium while they are exposed to themicrogravity of space. What might be a reason for this and what could astronauts do toprevent or slow the loss of calcium?Strategy CheckCan you test the hardness of chicken bones before and after soaking them in differentliquids?Can you hypothesize which solutions will remove calcium from bones and testyour hypothesis?Support, Movement, and Responses 15
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Chapter 15 Resource: Support, Movement, and Responses

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