3. Read the text again and answer the following questions.
(Đọc lại văn bản và trả lời các câu hỏi sau)
1. What are humans still wondering nowadays?
2. Why does a habitable planet need to have the correct amount of air?
3. What happens if a planet is too small?
4. How long does a day on Mars last?
5. Why can we not live on Mars?
Bài Làm:
1. What are humans still wondering nowadays?
Nowadays humans are still wondering what planets in outer space might support life.
2. Why does a habitable planet need to have the correct amount of air?
The planets need to have the correct amount of air so that they can hold an atmosphere around
3. What happens if a planet is too small?
If a planet is too small, its gravity is not strong enough to hold an enough amount of air.
4. How long does a day on Mars last?
Its days last for 24.5 hours and its seasons are similar to Earth's.
5. Why can we not live on Mars?
The climate on Mars is unsuitable for human life because it is too cold and Mars lacks oxygen to support human life.