The greenhouse effect This Power Point presentation has

The greenhouse effect This Power. Point presentation has been downloaded from www. onestopenglish. com. Presentation written by John Clegg. © Copyright Springer Nature Ltd 2018. Animation licensed from The Science Museum.

First … 1. Answer these questions: a) What do fossil fuels contain? b) What happens when we burn fossil fuels? c) What does a greenhouse gas do? d) What happens when more and more greenhouse gases go into the atmosphere? e) What happens when the Earth gets warmer?

Next 4. Look at the following picture slides and do exercise 2 on the worksheet: complete the gaps.

Fossil fuels – such as oil and gas – contain carbon from plants and animals that died millions of years ago.

When we burn fossil fuels, the carbon reacts with the oxygen in the air to form carbon dioxide.

Unfortunately, carbon dioxide is what we call a greenhouse gas.

That means it acts like a blanket that traps heat in the Earth’s atmosphere.

It does this by letting the sun’s light in, but not letting all of the heat produced by the sunlight back out again.

Normally this is a good thing, as we want the Earth to be nice and warm

But as more and more carbon dioxide goes into the atmosphere,

we begin to trap more heat and the Earth gets warmer and warmer.

This triggers changes in the weather and causes sea levels to rise.

Now … 5. Do exercise 3 on the worksheet: talk about the pictures using the prompts.

Presentation (for classes working in groups only) 6. Give an oral commentary on the picture slides.