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Reading answers with explanations

IELTS · Part 2 · Cambridge 10 — Test 3

Autumn leaves: Reading answers

Answers to questions 14–26 (13 in all), each with why it is right.

Sit it first, then check

Read the whole passage and answer in the exam interface, timed as on the day.

Practise this part

The passage opens

Canadian writer Jay Ingram investigates the mystery of why leaves turn red in the fall A One of the most captivating natural events of the year in many areas throughout North America is the turning of the leaves in the fall.The colours are magnificent, but the question of exactly why some trees turn yellow or orange, and others red or purple, is something which has long puzzled scientists. B Summer leaves are green because they are full of chlorophyll, the molecule that captures sunlight and converts that energy into new building materials for the tree.As fall approaches in the northern hemisphere, the amount of solar energy available declines considerably.For many trees - evergreen…

Answers 14–26

  1. 14

    a description of the substance responsible for the red colouration of leaves

    C Matching information

  2. 15

    the reason why trees drop their leaves in autumn

    B Matching information

  3. 16

    some evidence to confirm a theory about the purpose of the red leaves

    H Matching information

  4. 17

    an explanation of the function of chlorophyll

    B Matching information

  5. 18

    a suggestion that the red colouration in leaves could serve as a warning signal

    E Matching information

  6. 19

    sunlight Note completion

  7. 20

    upper Note completion

  8. 21

    dry Note completion

  9. 22

    north Note completion

  10. 23

    It is likely that the red pigments help to protect the leaf from freezing temperatures.

    FALSE True / False / Not Given

  11. 24

    The 'light screen' hypothesis would initially seem to contradict what is known about chlorophyll.

    TRUE True / False / Not Given

  12. 25

    Leaves which turn colours other than red are more likely to be damaged by sunlight.

    NOT GIVEN True / False / Not Given

  13. 26

    For which of the following questions does the writer offer an explanation?

    B: how leaves turn orange and yellow in autumn Multiple choice

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