Here are the correct answers for your Health Science worksheet, with a quick explanation for each to help you understand why.
1. Our skeleton has _______ bones
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Reasoning: While babies are born with around 270 bones, many of them fuse together as we grow up. By the time a person is an adult, they typically have 206 bones.
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Correct Option: b. 206
2. There are _______ pairs of ribs which protect the certain organs of the body.
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Reasoning: The rib cage is made up of 12 pairs of ribs (24 ribs total). They attach to the spine in the back and most attach to the breastbone in the front to protect the heart and lungs.
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Correct Option: c. 12
3. The skeleton acts as a reserve or reservoir for calcium, phosphorous and _______
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Reasoning: Bones store important minerals that the body needs to function. Along with calcium and phosphorus, bones also store magnesium. Vitamins and iron are not stored in the bone structure itself in the same way.
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Correct Option: a. magnesium
4. The skull is also called the _______ .
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Reasoning: The scientific name for the part of the skull that encloses the brain is the cranium. The femur is a leg bone, the mandible is just the lower jaw, and vertebrae are the bones in the spine.
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Correct Option: c. cranium
5. The skull protects this vital organ
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Reasoning: The main job of the hard skull is to act like a helmet to keep the brain safe from injury. The larynx, tongue, and kidneys are located elsewhere in the body.
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Correct Option: c. brain
6. Which of the following is a movable part of the skull
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Reasoning: Most of the bones in your skull are fused tightly together and cannot move. The only bone in the skull that can move freely is the lower jaw (mandible), which allows you to talk and chew.
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Correct Option: a. Lower jaw
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Final Answer:
1. b
2. c
3. a
4. c
5. c
6. a
Parent Tip: Review the logic above to help your child master the concept of health science worksheet.
