# A student discussion

Listen to two students comparing Mars and Earth to practise and improve your listening skills.

### Instructions

Do the preparation task first. Then listen to the audio and do the exercises.

### Transcript

Teacher: So you've got a few minutes to discuss with your partner.

Student 1: So, as far as I know, the main similarity between Mars and Earth is that they can both support human life.

Student 2: Yeah, but do we know that's actually true? I mean, Mars is much colder than Earth, isn't it? It says here it's about minus 55 degrees most of the time, whereas on Earth only places like Antarctica get that cold.

Student 1: True. Well then, I suppose you could say both planets are a similar distance from the Sun?

Student 2: No way! Mars is much further away! It says here it's about 228 million kilometres, while Earth is about 150 million.

Student 1: Yes, but in space that's not that far. Jupiter is, like, almost 780 million kilometres. That's why we use astronomical units when we talk about distances in space. Earth is 1 astronomical unit from the Sun and Mars is 1.3. The difference doesn't sound so big when you look at it that way.

Student 2: I see what you mean. Jupiter is 5.2 astronomical units so I guess you're right. What other similarities are there between the two planets?

Student 1: Let's see … not the colour, obviously!

Student 2: Yeah! Earth is called the blue planet and Mars is called the red planet for pretty obvious reasons!

Student 1: Their sizes are pretty different. Mars is about half the size of Earth.

Student 2: What about this? It looks like the days on both planets are almost the same length. Earth's day is 24 hours but Mars's is about half an hour longer.

Student 1: You're right. OK, any other things they both share?

Student 2: I suppose you could say they have water in common.

Student 1: Could you? How?

Student 2: Well, Earth is 70 per cent water and Mars probably had huge oceans in the past. It's just that most of the water there now is probably frozen.

Student 1: Ah, I see. I don't think we can say the air is the same, though. Most of Earth's air is nitrogen and oxygen, but Mars …?

Student 2: Mars doesn't really have air, not compared with Earth. It's got about one per cent as much air as Earth.

Student 1: Right, and it's mostly carbon dioxide.

Student 2: Gravity is another difference. I didn't know this, but Mars has higher gravity than the Moon. But it's much less than on Earth, of course.

Student 1: Oh, yes. It says Mars has about 38 per cent of Earth's gravity.

Teacher: OK, let's see what you've found …

### Language level

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Submitted by jeison0894 on Mon, 05/04/2021 - 14:58

In reality, many organizations and groups interested in making it possible for humans to colonize Mars are working hard on that and making great strides, especially Elon Musk's space company SpaceX, who said he hopes to get the first humans there by 2024. Perhaps this is something we will see sooner than we imagine.

Submitted by Morrow on Mon, 05/04/2021 - 09:16

I think if there is no place in the earth, we must make Mars be livable planet then.

Submitted by Frank Cuello on Wed, 24/03/2021 - 20:56

Considering the facts that the students discuss in the audio, I think it is barely possible that we can live on Mars.

Submitted by karapetanya on Wed, 24/03/2021 - 17:32

I think people will live on Mars one day,because we already have this idea.Also scientists are investigating this planet for life. Ofcourse we can think about moving to another planet,but it's more important to take care about our Earth.It is incredible.I am sorry for my mistakes,please correct me if you want

Submitted by Jos2021 on Sat, 20/03/2021 - 21:53

Yeah. As Soon as humans find out about some resources in Mars

Submitted by Kay on Tue, 16/03/2021 - 22:19

Maybe someday, that will happen, as technology advance. Who could have thought that man will visit the moon some centuries past? My point is human has the innate capacity to think and bring forth witty inventions of which advancement that could aid human lives in Mars could be possible.

Submitted by In on Sun, 14/03/2021 - 07:52