# A student discussion

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

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

Submitted by esi on Sat, 22/08/2020 - 15:19

I think humans will go to Mars such as they have gone to antarectic. they will build only scientific base because earth is best place for life.

Submitted by Rinaa on Fri, 21/08/2020 - 20:54

Yes, I think the March support human life. I have seen a documentary about life in March. As far as I know, there is water in March and that means March can be a habitat for animals and plants. But for what kind of creature? we already don’t know. We are destroying our Earth every day, and soon there won't be able to live there, so maybe our new house will be in March. First, we should investigate if the march is suitable for Earth creatures. If March will provide us key living factors as water, air, and a good climate, we will move there with pleasure.

Submitted by tuannam on Thu, 20/08/2020 - 13:44

Maybe one day but it's not for tomorrow.

Submitted by Daniela Zapata on Wed, 19/08/2020 - 23:49

I think Mars will support human life in many years. We need a lot of researchs to find how to deal with the facts like it has less gravity than the Earth, It´s almost a frozen planet and it doesn´t have air. In this moments scientists are doing a lot of investigations about this and I hope humans can live on Mars one day, but definitely won´t be this generation.

Submitted by Wei Yan Min on Tue, 18/08/2020 - 15:30

Maybe! I hope to visit the space one-day but I don't know it'll happen.

Submitted by yzdxsmx on Mon, 17/08/2020 - 11:09

I can't tell for sure if Mars is suitable for Earth creatures. Mars is much colder than Earth, and we found no liquid water except ice so far. I wonder how the ice on Mars can be melted into the water for use. But I've read, in the past few weeks, some countries have sent new spacecraft to Mars for further exploration. Meanwhile, scientists are continuing to research whether planets are there in the cosmos that are appropriate for living there. I think some point in the future humans might move into space, but it is not necessary to be on Mars or planets in the solar system. Even if we could move to another planet, we should take good care of the earth.

Submitted by Loda.iQ on Sun, 16/08/2020 - 08:27