1.(v) How does physical exertion affect body temperature and sleep quality ? Paragraph (4)
1.(v) How does physical exertion affect body temperature and sleep quality ? Paragraph (4)
Physical exertion depletes the body's energy and raises (elevates) its body temperature. This improves sleep quality because at night the body has to work harder to cool itself down, which promotes deeper, better sleep.
Marking Scheme
- 11 mark for stating that physical exertion elevates/raises body temperature (and depletes energy) AND that this improves sleep quality because the body works harder to cool down at night.
- 2Half-credit reasoning accepted if either the temperature rise or the improved-sleep-via-cooling link is clearly given; full mark requires both ideas connected.
- 3No mark for a vague 'exercise makes you tired so you sleep well' without the temperature/cooling mechanism.
Hint
Paragraph 4 links raised body temperature to the body 'working harder to cool down at night'.
Quick Oral Answer
Exercise uses up energy and raises body temperature, and because the body then works harder to cool down at night, you end up sleeping better.
Analysis & Explanation
A 1-mark cause-and-effect comprehension question anchored to paragraph 4.
Concept: State both linked effects — on body temperature and on sleep quality — since the question asks 'how' for both.
Key points
- Paragraph 4: 'Physical exertion depletes energy and elevates body temperature, which improves sleep quality by making the body work harder to cool down at night.'
- Two-part answer needed: (1) exertion raises body temperature/depletes energy, (2) this improves sleep because the body works harder to cool down at night.
Common mistakes
- Mentioning only that sleep improves, without explaining the cooling-down mechanism.
- Quoting the unrelated '65 percent' statistic as if it were the mechanism.
Common Mistakes
- 1Mentioning only that sleep improves without explaining the raised-temperature-and-cooling mechanism.
- 2Quoting the 65 percent / 150 minutes figure as the answer instead of the temperature-sleep relationship.
- 3Saying exercise 'lowers' body temperature — the passage says it elevates it, and cooling down happens afterwards at night.
Interesting Facts
Sleep scientists confirm the passage's logic: the natural drop in core body temperature at night is a key signal that helps trigger and deepen sleep, so a warm body cooling down promotes better rest.
Paragraph 4 also notes that at least 150 minutes of exercise a week can enhance sleep quality by up to 65 percent — a striking, specific figure worth remembering for this passage.
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Frequently Asked Questions
Does exercise raise or lower body temperature according to the passage?
It raises (elevates) body temperature. Paragraph 4 says physical exertion 'depletes energy and elevates body temperature', and the cooling-down that follows at night is what improves sleep.
Do I need to mention both temperature and sleep?
Yes. The question asks how exertion affects both, so a full-mark answer states that it elevates body temperature and improves sleep quality by making the body work harder to cool down at night.