B2 First FCE escucha 7

1. Listen to the recording and choose the correct answer.

What is the basic mechanism of the greenhouse effect described by the speaker?

A) The sun’s rays bounce off the ice caps and freeze the atmosphere. B) Gases in the atmosphere trap the sun’s heat, keeping the Earth warm enough to sustain life. C) The Earth produces its own heat which is cooled down by the atmosphere.

2. What is the primary human activity that has drastically increased greenhouse gases?

A) The burning of fossil fuels like coal, oil, and natural gas for energy. B) Planting too many trees in urban areas. C) Breathing too heavily during exercise.

3. Which specific gas is mentioned as the largest contributor to human-caused global warming?

A) Carbon Dioxide (CO2) B) Oxygen (O2) C) Nitrous Oxide (N2O)

4. According to the speaker, how do scientists know what historical CO2 levels were like?

A) They guess based on ancient historical texts. B) They analyze air bubbles trapped deep within ancient ice cores from Antarctica and Greenland. C) They use time machines to go back and measure it.

5. What is one of the most visible consequences of rising global temperatures mentioned?

A) Animals learning to adapt instantly to heat. B) The oceans completely drying up. C) The rapid melting of glaciers and polar ice caps, leading to rising sea levels.

6. How does ocean acidification occur?

A) When the ocean absorbs large amounts of excess CO2 from the atmosphere, changing its chemistry. B) When fish produce too much acid. C) When toxic waste is dumped directly into the sea.

7. Why is ocean acidification a major problem?

A) It makes the water too hot to swim in. B) It turns the water a bright green color. C) It severely damages coral reefs and marine life that rely on calcium carbonate shells.

8. What does the speaker say about extreme weather events?

A) They are completely unrelated to global warming. B) Climate change makes them more frequent and more intense (e.g., severe hurricanes, droughts). C) They are becoming less frequent and less severe.

9. What is a ’tipping point’ in the context of climate change?

A) The highest temperature recorded in a year. B) A critical threshold that, when crossed, leads to irreversible and drastic changes in the climate system. C) The point where all politicians agree on a solution.

10. What is the ultimate message regarding solving the climate crisis?

A) We must rapidly transition to renewable energy sources and drastically cut emissions worldwide. B) It is too late to do anything, so we should give up. C) Only planting trees can solve the entire problem.

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