پاسخ تمرينات درس 6 پيش دانشگاهی
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1 -It is very important to know about space because it is part of the universe.
2 -Because they want to improve their knowledge and to become more powerful than other countries.
3 -So far, scientists have not found life on other planets. There are no human beings, animals, or plants on other planets.
4 -Yes, It may be possible for them to live on other planets in future.
5 -The sun and the planets that move around it are called the solar system.
6 -It is a laboratory in space that people can live in for long periods of time.
7 -It is a laboratory in space in which scientists can live and work to study about the space
a space craft craters on the moon phases of the moon space station
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1. (F) Before the telescope was invented, people knew nothing about space.
2. (T) The modern age of space exploration began in the later half of the 20th century.
3. (T) Scientists still receive pictures sent by the Voyagers I and II.
4. (F) Human beings have been able to land on Mars.
5. (N) The moon doesn't have as much ice as Antarctica does.
2. A) .d) launch of the International Space Station
B) Using telescopes, satellites, and space probes, scientists try to find out more about earth, Solar System and what is beyond.
C) They are thinking about the possibility of building bases on the moon that could be used as a research station.
Page 57
1. Yes, because he was probably the first person to use the telescope to study the sky.
2. Because, it is probably difficult to send spacecrafts to long term missions, and it is difficult to keep human beings safe in the space. Since there is no human being in a space probe, it is easier and cheaper to launch space probes rather than spacecrafts.
3. It may offer many things such as new discoveries, new resources and better places to live.
a: A space probe is a robot vehicle used to explore deep space.
b: A satellite is any natural body, like the moon, or any artificial object that orbits another object.
c: A telescope is an instrument that magnifies, or makes larger, distant objects.
As an examples, we can refer to the Voyager I and Voyager II which were launched in 1977. Other early space probes included Viking I and Viking II which landed on Mars in 1976, and the Pioneer probes, which used instruments to see through thick clouds that cover Venus.
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Part 1 : Isaac Newton using a better telescope to observe other objects in space
Former Soviet Union launching Spotnic I
The United States launching its own satellite
Apollo mission landing 12 humans on the moon
Vikings and II landing on Mars
Voyager I and II sending back pictures from space
ISS launching of the first units of ISS (International Space Station)
Part 2: A large hole in a side of a cliff or hill, or under the ground
An instrument
period in history starting from a particular time or event
either of the two points at the exact top or bottom of the Earth
A substance such as salt that is formed naturally in rocks,
Pagr 59
1. There are a lot of motor vehicles on the roads of our city.
2. Can you give me further details of how the accident happened.
3. A micro scope will magnify these germs, so that you can actually see them.
4. We observed the sunset from the top of the mountain.
5. Tell me, are these beautiful flowers natural or artificial?
6. Ali's father has traveled to distant parts of the world.
7. Taking photographs is not allowed inside this museum.
8. The dress designer measured Mary for her new clothes.
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1. They mean "with the aim that".
2. They show the purpose or intention of doing something.
3. In sentence 1 the verb tense is present continuous whereas in sentences 2 and 3 the verbs are in past tense. Therefore, in sentence 1 we have so that + will + bare infinitive, but in sentences 2 and 3 could and would + bare infinitive have been used.
Part 1 : 1. Space exploration is the use of space travel in order to/to discover the universe beyond the Earth.
2. Missions have to be carefully designed so that astronauts will be kept safe from take off to landing.
3. Today the world's space agencies try to organize robotic missions to/in order to make space exploration cheaper.
4. The first thing to do was to develop powerful rockets to put a satellite into orbit.
5. These rockets needed both force and guidance systems so that they could be directed to reach their orbits.
Part 2: 2. I get up early everyday to get to school on time.
3. He went to Canada to continue his studies.
4. They launched a new space prop to learn more about Mars.
5. She exercises regularly to remain healthy.
Page 61:Part 3: 1. He has started walking to work in order to get more exercise.
2. I wrote down his address so as not to forget it.
3. Ali turned on the television so that he could see the football game.
4. Mary is saving money so that she can buy a new car.
5. Reza turned down the radio so as not to disturb his roommate.