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Term 4 Ns > Ns > Flashcards

Ns Flashcards

1
Q

Why does the sun not look like a star

A

Because it’s so close to us

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2
Q

Why can’t we see other stars in the day

A

The sun is to bright

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3
Q

What are the name of the planets, asteroids that orbit the sun (group name)

A

Celestial bodies

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4
Q

What is the closest planet to the sun

A

Mercury

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5
Q

What does mercury mainly consist of

A

Iron

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6
Q

How many earth days does it take mercury to spin around the sun

A

88 days

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7
Q

How big is Venus (approximately )

A

Earth size

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8
Q

How long does it take Venus to orbit the sun

A

225 days

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9
Q

How long does it take Venus to orbit its own axis

A

243 earth days

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10
Q

How many days/ hours for earth to spin on its own axis

A

1 day or 24hours

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11
Q

Why is Mars know as the red planet

A

Because of iron oxide (rust)

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12
Q

How long does it take Mars to orbit the sun

A

687 days

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13
Q

How many moons does Mars have

A

2 moons

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14
Q

What type of planet is Jupiter

A

Gaseous plant

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15
Q

How long does it take Jupiter to orbit the sun

A

4332 days

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16
Q

What is the second largest planet in our solar system

A

Saturn

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17
Q

How long does it take Saturn to orbit the sun

A

29,5 years

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18
Q

Which planet rotates on its side

A

Uranus

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19
Q

Does Uranus have rings

A

Yes it does

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20
Q

How long does it take for Uranus to orbit the sun

A

84 years

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21
Q

How long does it take for Neptune to orbit the sun

A

164,8 years

22
Q

What are asteroids

A

Irregular shaped rocks

23
Q

Do moons emit there own light and heat

A

No

24
Q

What is a telescope

A

An instrument that makes things in space look closer and larger

25
Q

What is built over a optical telescope

A

A dome

26
Q

What are the domes used for

A

To protect the telescope from weather that’s why there big

27
Q

What does the optical telescope capture and what by

A

Light waves emitted by stars and captured by dishes made by mirrors and magnified by lenses

28
Q

Why are telescopes built in remote areas

A

Because the city lights will make it harder to see the stars

29
Q

What do radio telescopes do

A

Stars emit there in the form of radio waves as well in the form of light

30
Q

What do radio telescopes capture

A

Radio waves

31
Q

Where must radio telescope be built and why

A

Remote low lying areas. To prevent disturbances radios tv’s and radar

32
Q

What is connect to a radio telescope and why i

A

USA,my a metal dish is connected to a computer which can convert these waves into images

33
Q

Where can spaced telescopes be placed

A

They can be placed in a orbit

34
Q

What type of telescope can space telescopes be

A

Optical or radio telescopes

35
Q

What telescope can observe space closely

A

Space telescopes

36
Q

Name 2 space telescopes

A

Hubble telescope and SOHO telescope

37
Q

What does SALT stand for

A

South African Large Telescope

38
Q

What is the largest telescope in southern hemisphere

A

SALT

39
Q

How many individual hexagonal mirrors are there in SALT

A

91 hexagonal mirrors

40
Q

How many countries is SALT joint with

A

6 countries

41
Q

Where is SALT built near

A

Sutherland in the Western Cape

42
Q

What does SKA stand for

A

Square kilometre array

43
Q

What is the surface area of the individual antennae of SKA approximately add up to

A

1 square kilometre

44
Q

What is SKA aka

A

Meerkat

45
Q

Where is the SKA project based

A

South Africa and Australia

46
Q

Where are SKA dishes mainly built near

A

Carnarvon in the Northern Cape

47
Q

What does SKA do

A

Captures radio waves from stars we can’t see with the naked eye then sent to a computer. The computer process all the signals from the dishes and images of the stars are formed

48
Q

Who was the first person on the moon

A

Neil Armstrong

49
Q

Who sent the first moon rover and when

A

Russia in 1970

50
Q

What is the name of the first moon rover sent to the moon and what information did it get (how many meters did it get how many pictures)

A

Lunokhod 1 drove 197m and took 14 close - up and 12 landscape pictures

Term 4 Ns (1 decks)

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