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IELTS® Listening Practice 20

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This listening practice simulates the third section of the IELTS Listening test. Listen to the audio and answer questions 21-30.
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Questions 21-25
What does each fossil type show or involve?
  1. Less familiar plant-remain category.
  2. Only the outline survives.
  3. Linked with muddy wet environments.
  4. May be transported a long distance.
  5. Keeps the original form as a solid model.
  6. Shows plant cells in detail.

Write the correct letter A-F next to questions 21-25.

21. Impression fossils

22. Cast fossils

23. Permineralisation fossils

24. Compaction fossils

25. Fusain fossils

The correct answer is B because the speakers say impression fossils preserve the outline of a plant but leave no original organic material for analysis.

Associated Text:
They're really useful for the shape, but the catch is that they're completely inorganic, there's no biological tissue left in them at all,

The correct answer is E because cast fossils keep the original form as a solid model rather than just a flat outline.

Associated Text:
The thing that sets them apart from a flat impression is that they're effectively a three dimensional model of the original plant, depth and shape are preserved, not just an outline.

The correct answer is F because permineralisation fossils allow scientists to study plant cells in detail.

Associated Text:
Yes, right down to the cellular level, which we just can't get from any of the other fossil types.

The correct answer is C because compaction fossils are associated with soft, wet ground such as wetlands, marshes and muddy environments.

Associated Text:
they tend to turn up in waterlogged, soft ground, wetlands, marshes and similarly muddy environments.

The correct answer is D because fusain fossils are tiny, light burned plant remains that rivers or sea currents can move a long way.

Associated Text:
Because they're tiny and very light, they can be carried along by rivers or sea currents over significant distances. So they show up far from the usual fossil sites,

Questions 26-30
Complete the flow chart using the list of words, A-H, below.

Complete the flow chart below.

Once a spacecraft lands, it deploys a rover.
The rover is directed to an organic-rich (26) .
It drills below the surface to avoid (27) .
The soil and rocks are checked for fossil traces.
The sample is ground into a fine powder.
The powder undergoes (28) .
A mass spectrometer scans for signs such as (29) .
The (30) are compared with Earth-based data.
  1. contamination
  2. vehicle
  3. heat
  4. results
  5. radiation
  6. site
  7. microbes
  8. water

The correct answer is F because the rover is directed to a site known to contain a wide variety of organic material.

Associated Text:
The rover then has to find a place where there's a wide variety of organic material, so it's steered to a site that is known to contain that.

The correct answer is E because the speakers explain that surface radiation could destroy organisms, so samples are drilled from below the surface to avoid radiation.

Associated Text:
Unlike Earth, the surface might be exposed to high levels of radiation, which would destroy any organism living right on the top.

The correct answer is C because after the sample is ground into powder, the next step is to expose the powder to heat.

Associated Text:
the sample is ground into a fine powder.
Daniel: Doesn't that destroy any tiny structures?
Lena: Luckily, no. And in the next stage, the powder has to be exposed to heat,

The correct answer is G because the mass spectrometer is used to scan for tiny biological signs, and microbes are given as the example.

Associated Text:
This level of analysis is needed to scan for tiny biological signs that are far smaller than fossils, for example, microbes.

The correct answer is D because the final step is to send data back to Earth and compare the results with established Earth-based data.

Associated Text:
The results are then matched against established Earth based data, for example data from large bodies of water, or from desert soils, to see how the alien sample compares.

Note: After the instruction audio, you will have 20 seconds to look at questions before listening to the conversation.
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Answer Sheet
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40
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Score Summary
0 / 1
Multiple Choice
Summary Completion
Multiple Selection
Short Answer
Matching
Sentence Completion
Diagram Labelling
Note Completion
Form Completion
Table Completion
Flow Chart Completion
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