Expression of IdeasEasy–MediumEmphasising a difference in scale
Expression of Ideas practice question
While researching a topic, a student has taken the following notes:
- The blue whale's heart weighs about 180 kilograms.
- A human heart weighs about 300 grams.
- The whale's heart beats as slowly as twice a minute during deep dives.
- Its aorta is wide enough for a child to crawl through.
The student wants to emphasise how much larger a blue whale's heart is than a human's. Which choice most effectively uses relevant information from the notes to accomplish this goal?
- A. A blue whale's heart weighs about 180 kilograms — roughly 600 times the 300 grams of a human heart.Correct
- B. A blue whale's heart can beat as slowly as twice a minute.
- C. A human heart weighs about 300 grams.
- D. Blue whales are the largest animals.
Answer: A. A blue whale's heart weighs about 180 kilograms — roughly 600 times the 300 grams of a human heart.
Both weights and the factor between them.
Why the other answers are wrong
- B. A blue whale's heart can beat as slowly as twice a minute.
- About rate, not size.
- C. A human heart weighs about 300 grams.
- Only the human figure.
- D. Blue whales are the largest animals.
- Not from the notes and no comparison of hearts.
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