EVS- SPACE EXPEDITION

CH: 13 SPACE EXPEDITION

New Words

1.       Gravity

2.        Space

3.        Spacesuit

4.        Space shuttle

5.        Vacuum

6.        Astronaut

7.         Spationaut

8.         Cosmonaut

9.         Taikonaut

10.                   Unanimously

11.                   Scuba diving

12.                   Cumbersome

13.                   Weightlessness

14.                   Inquisitive

15.                   Yuri Gagarin

16.                   Valentina Tereshkova

17.                   Neil Armstrong

18.                   Columbia

19.                   Foreign

20.                   Resistance

 

Q-1) Define:

1) Space Expedition: Space expedition is a journey to space, undertaken by a group of people with a definite objective.

2) Astronaut: An astronaut is a person who travels into space and collect more information about it.

3) Man-made satellite: An artificial body placed in an orbit round the Earth or another planet in order to collect information or for communication.

4) No gravity or zero gravity:  No gravity or zero gravity is the condition of weightlessness occurring in a body with no resistance. The body moves around freely.

5)  Vacuum : A space where all or most of the air is removed.

6) Scuba-diving : Scuba diving is a mode of underwater  diving in which the diver uses a self- contained water breathing  machine (scuba) which is completely independent of surface supply, to breathe underwater.

 Q-2) State the importance of space suits.

1) Spacesuit protects the astronauts from getting too hot or cold and from dangers of being outside in space.

2)  The spacesuit holds water to drink and also gives oxygen to breathe.

3)  The spacesuit protects astronauts from getting hurt by space dust.

4) It has a gold lined shade which protects their eyes from sunlight.

Q-3)  What Basic skills an astronaut should possess?

Ans: (a) Scuba diving (diving deep under water) skills.

         (b) Medical skills.

         (c) Should know foreign languages.

         (d) Need sound knowledge of Science and space technology.

Q-4) Why do astronauts learn scuba-diving?

Ans - Scuba-diving helps the astronauts to prepare for spacewalk and feel the absence of weight (weightlessness) as they would do in space. Any time an astronaut needs to get out of the vehicle while in space, it is called a spacewalk.

Q-5) What is space shuttle? Explain.

Ans: a) A space shuttle is a spacecraft similar to a rocket and an airplane.

b) The space shuttle is used for sending people into space.

c)   The space shuttle allows humans to explore boundaries outside the Earth’s atmosphere.

d) Seven astronauts can fly at one time in one space shuttle.

e) The combination of oxygen and hydrogen gases is used in the fuel of the space shuttle.

f)    The space shuttles are remarkable machines as they travel swiftly and can get away from the Earth’s gravity.

g)  The journey to space from the Earth’s surface is completed in just 8 ½ minutes.

Q-6) What are the difficulties faced by astronauts in space?

Ans - The difficulties faced by astronauts in space are:

1) Absence of gravity – weightlessness, leads to immunity problems and weak eyesight.

2) Excessive space debris (waste of space).

3) Food- shrink-wrapped meals and water

4) Deadly space radiations.     

Q-7. How do astronauts live in space?

1) Food is kept in plastic containers.

2) Cold water is added to some foods to bring back their texture.

3) Foods such as fruits, breads and nuts are consumed as they are. Straws are used to drink liquids.

Q-8. How astronauts maintain personal hygiene?

 Ans: Astronauts wipe themselves with alcohol or use a wet towel which has liquid soap to wash hands and faces. After washing, they use dry towels to dry themselves as running water cannot be used for washing hands, etc.

Home work.

Q 1.What is the full form of NASA?

Q2. What do the astronauts use as a fuel for space shuttle?