# 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 GiulianaAndy on Thu, 17/06/2021 - 18:12

Yes, I do. In my opinion people will live on Mars one day, because science is in an advanced level, and also astronomy is very development nowadays.

Submitted by Khin Yee Mon Khaing on Wed, 16/06/2021 - 07:54

I don't think because we all human needs oxygen to live.Mars has no oxygen whereas it has water.

Submitted by Pann Nilar Htun on Wed, 16/06/2021 - 06:00

I don't think people can live in Mars. Because there is too cold and 1/3 smaller than Earth. But it can be changed by time to time. I interested to visit to the Mars, red planet.

Submitted by fontan on Sun, 02/05/2021 - 23:57

Maybe we will maybe we won't, We need time to discover something to move Mars or another planet. I believe there are lots of things to discover in the Earth for example oceans and seas. My be we'll discover something and it works in a new technology. And maybe this technology will help us about air issue. Maybe We have to learn how to beautify our environment and live respectful with ourselves and the other living things.

Submitted by Mai Khin Nway Shein on Sat, 24/04/2021 - 15:59

I don't think people will live on Mars cause God created us on the earth, not on Mars. You can only live where God allows. No matter how good technologies and science, you can not do it without God's permission.

Submitted by Suraj paliwal on Thu, 15/04/2021 - 04:15