16Hit1600
Expression of IdeasEasy–MediumEmphasising a striking figure

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A single oak leaf loses water through thousands of tiny pores. - A mature oak can move about 400 litres of water from soil to air on a hot day. - That is roughly two full bathtubs. - The water cools the air around the tree.

The student wants to emphasise how much water a mature oak moves in a day. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. On a hot day a mature oak can move about 400 litres of water from soil to air — roughly two full bathtubs.Correct
  2. B. Oak leaves have thousands of tiny pores.
  3. C. Trees cool the air around them.
  4. D. Oaks need water.

Answer: A. On a hot day a mature oak can move about 400 litres of water from soil to air — roughly two full bathtubs.

The figure with a comparison.

Why the other answers are wrong

B. Oak leaves have thousands of tiny pores.
The mechanism, not the quantity.
C. Trees cool the air around them.
The effect, not the quantity.
D. Oaks need water.
A generality.

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