# 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

Submitted by khosro on Thu, 23/04/2020 - 11:24

Hi everybody. I think we will be able to live in mars in future, but not now. But it is more important to learn better living in our planet,earth. We most learn living in peace. Not polluting the environment , help each other to have a better life. If we wouldn’t learn, we would destroy the Mars too.

Submitted by JuanManuelLopezGil on Tue, 21/04/2020 - 00:09

Of course, because this planet is not eternal.

Submitted by SANDRA YINNET on Mon, 20/04/2020 - 02:08

I think that this a possibility in the future if we don't become aware and responsability with our planet, the NASA have was studing this possibility during years looking one alternattive for the future, but the conditions of this planet don't are the better for us. I think that the best is take care our planet for next generations.

Submitted by gstavale on Thu, 16/04/2020 - 23:37

I am not sure. In my opinion, the humanity is a long way from it. I think that much more studies will be necessary to stay close to that and many more money will be spent to support the studies. Will the developmental countries give priority to these investments?

Submitted by rocio_botelloo on Thu, 16/04/2020 - 18:12

Well, I do not remove the possibility that in a given future we can live on Mars, but right now or in a few years, due to the conditions that are said in the listening I see it as impossible. But you never know what technology can do so that we can live many more years, but even if they are similar planets, I see little possibility. But also, our planet is already annoying enough to destroy another like Mars, that is, humans without realizing it, we are destroying our own planet. So I think that even if we could go, we shouldn't live on a planet like Mars.We are decently on our planet and I hope that in a few years we can continue to be.

Submitted by jesus on Wed, 15/04/2020 - 22:19

Hi Guys; I do not know where ours future generations will live but the true is we are destroying our planet. If the scientist are looking for a new planet to live ,the final is closest. I suggest that if life is possible in Mars, humans beens should not go there to spoil it like the Earth.

Submitted by raulesteban on Wed, 15/04/2020 - 10:52