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Science Grade 9 > Astro: Sun, Moon, Eclipse, Seasons > Flashcards

Astro: Sun, Moon, Eclipse, Seasons Flashcards

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1
Q

The sun contains how much on the mass of the solar system

A

99.86%

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2
Q

What are the 3 zones of the sun (from the inside)

A

Core, radiative zone, convective zone

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3
Q

What are the 3 sun atmospheres (from the outside)

A

Corona, chromosphere, photosphere

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4
Q

From the core, light and heat pass through the _____

A

Photosphere

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5
Q

What passes through the photosphere

A

Heat and light

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6
Q

What is before the radiative zone

A

The core

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7
Q

What is after the core

A

Radiative zone

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8
Q

What is after the radiative zone

A

Convective zone

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9
Q

What is before the convective zone

A

Radiative zone

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10
Q

The convective zone is

A

Where light energy (photons) is created

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11
Q

The radiative zone ….

A

Transports the sun’s energy through radiation

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12
Q

The Penumbra is..?

A

The outer shadow

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13
Q

The umbra is..?

A

The inner shadow

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14
Q

What are the 3 types of eclipses

A

Total, Annular, Partial (TAP)

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15
Q

What’s the longest a solar eclipse can last

A

7.5 mins

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16
Q

A solar eclipse occurs every..?

A

18 months

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17
Q

What’s the longest a lunar eclipse can last?

A

A lunar eclipse can last 3 hours and 45 mins

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18
Q

How much is the earth’s axis tilted

A

23.5°

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19
Q

If it’s summer in the NH, what is it in the SH?

A

Winter

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20
Q

If it’s spring in the SH, what about the NH?

A

Autumn

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21
Q

What’s the season when the north pole starts to move towards the sun

A

Spring

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22
Q

In summer has the sun risen higher or lower?

A

Higher

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23
Q

In winter has the sun risen higher or lower?

A

Lower

24
Q

How is the NH placed during summer in relation to the sun.

A

The sun is directly hitting the NH

25
Q

When it is winter how’s the sun shining?

A

It’s Indirect sunlight

26
Q

From full moon how many days until a crescent appears

A

15 days

27
Q

How does an eclipse occur/what is it

A

When a celestial body moves into the shadow of another celestial body

28
Q

What moon phase needs to be present for a solar eclipse

A

New moon

29
Q

What moon phase needs to be present for a lunar eclipse

A

Full moon

30
Q

How many lunar eclipses per year

A

2

31
Q

Never look directly at the ___

A

Sun

32
Q

The moons dark inner shadow is called _____

A

The Umbra

33
Q

The moons faint shadow is called _____

A

The Penumbra

34
Q

Within the penumbral shadow, you can only see _____ solar eclipse

A

Partial

35
Q

In the umbral shadow, you can only see _____ solar eclipse

A

Total

36
Q

During solar eclipse, the view can see the outermost layer called the ______

A

Corona

37
Q

What colour is the corona

A

Silver

38
Q

During lunar eclipse the viewer sees what moon

A

Blood red moon

39
Q

Earth experiences seasons because?

A

Of the tilt of earth on its axis as it orbits the sun

40
Q

Which of sun’s layers is the hottest

A

Corona

41
Q

What Is the chromosphere

A

Outer layer next to the photosphere. It is red and emits intense solar flares. 4x hotter than the previous also

42
Q

What is the sun’s transitional zone

A

The transition region is a very narrow (60 miles / 100 km) layer between the chromosphere and the corona where the temperature rises abruptly from about 8000 to about 500,000 K

43
Q

You can only view the corona with:

A

A coronagraph or total solar eclipse

44
Q

What is an annular solar eclipse

A

When the moon covers earth but is too far away making it seem smaller and not covering all of the sun from earth

45
Q

Avg corona temp

A

1-2 million °C

46
Q

The sun releases what energy and how

A

Thermal and radiant energy through nuclear fusion

47
Q

Does a comet emit or reflect light

A

Reflect

48
Q

Does a meteor emit or reflect light

A

Emits

49
Q

How many elements are created in the sun

A

26

50
Q

Where are all the other elements created

A

Supernovas

51
Q

Does a space shuttle emit or reflect light

A

Both (engine)

52
Q

Why is the sun so significant

A

Light and heat, gravity keeps orbits, power generation, photosynthesis

53
Q

How long for light to reach earth

A

8 mins

54
Q

Is the sun a solid mass?

A

Nope, all gaseous

55
Q

Natural phonemena attributed to the sun?

A

Sunspots, solar flare, day & night cycles, weather, seasons, wind, water currents

Science Grade 9 (6 decks)

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