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Spring 2015 > ASTR Exam 2 the sky > Flashcards

ASTR Exam 2 the sky Flashcards

1
Q

Does everyone on the Earth experience the same seasons Simultaneously?

A

No

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2
Q

When is the Earth furthest from the Sun?

A

July 4

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3
Q

When is the Earth closest to the Sun?

A

January 3

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4
Q

How is the Earth divided by seasons?

A

The Northern Hemisphere and the Southern Hemisphere.

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5
Q

What is the reason why we have seasons?

A

The Earth is tilted 23 1/2 degrees.

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6
Q

How does the tilt of the Earth cause seasonal change?

A
  1. The Sun is above the horizon longer during the summer months, and vice versa.
  2. The sunlight is more direct during the summer months, and vice versa.
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7
Q

When is vernal equinox and how many hours of sunlight do we recieve?

A

March 21

12 hours

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8
Q

When is summer solstice and how many hours of sunlight do we recieve?

A

June 22

14 hours

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9
Q

When is autumnal equinox and how many hours of sunlight do we recieve?

A

September 23

12 hours

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10
Q

When is winter solstice and how many hours of sunlight do we recieve?

A

December 22

10 hours

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11
Q

How do you measure sizes in the sky?

A

Angles

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12
Q

How many degrees is the Moon?

A

0.5 degrees

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13
Q

How many degrees is your finger?

A

1 - 1.5 degrees

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14
Q

How many degrees is your fist?

A

10 degrees

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15
Q

How many degrees is your fist with your pinky and thumbs out?

A

20 degrees

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16
Q

Why does the sky change?

A
  • Because the Earth is moving

- Because the objects in the sky are moving

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17
Q

What are the 2 types of motion?

A
  • Diurnal Motion

- Annual Motion

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18
Q

What is Diurnal Motion?

A
  • the Earth’s rotation

- Daily motion

19
Q

What is Annual Motion?

A
  • the Earth’s orbit

- Yearly motion

20
Q

Which way does the Earth rotate and revolve?

A

The Earth rotates and revolves towards the East

21
Q

In a time lapse photo, a streak that measure 360 degrees is how many hours?

A

24 hours

22
Q

In a time lapse photo, a streak that measure 15 degrees is how many hours?

A

1 hour

23
Q

In a time lapse photo, a streak that measure 1 degrees is how many hours?

A

4 minutes

24
Q

How many degrees does the Earth revolve every 365 days?

A

360 degrees

25
Q

How many degrees does the Earth revolve in 1 day?

A

1 degree

26
Q

Every night the sky is shifted how many degrees in what direction?

A

1 degree towards the West

27
Q

What is the apparent path of the Sun called?

A

Ecliptic

28
Q

How many degrees doe the Earth revolve in 30 days?

A

30 degrees

29
Q

How many degrees does the Moon revolve around the Earth in 30 days?

A

360 degrees (a complete orbit)

30
Q

What percentage of the Moon is always illuminated by the Sun?

A

50%

31
Q

What are the 8 phases of the Moon in order?

A
  1. New Moon
  2. Waxing Cresent
  3. First Quarter
  4. Waxing Gibbious
  5. Full Moon
  6. Waning Gibbious
  7. Third Quarter
  8. Waning Cresent
32
Q

When does the New Moon Rise and Set?

A

6am - 6pm

33
Q

When does the 1st Quarter Moon rise and set?

A

12pm - 12am

34
Q

When does the Full Moon rise and set?

A

6pm - 6am

35
Q

When does the 3rd Quarter Moon rise and set?

A

12am - 12pm

36
Q

What is “Cresent”?

A

thins sliver

37
Q

What is “Gibbious”?

A

slightly less illuminated than full

38
Q

What is “Waning”?

A

illuminated portion is growing smaller

39
Q

What is “Waxing”?

A

illuminated portion is growing larger

40
Q

What is required for an eclipse to happen?

A
  1. the Sun, Earth, and Moon line up

2. the Sun, Earth, and Moon are all in the ecliptic plane

41
Q

What are the 2 types of eclipses?

A

Solar and Lunar

42
Q

What is a Solar Eclipse?

A

the New Moon passes between the Sun and the Earth

43
Q

What is a Lunar Eclipse?

A

The Full Moon passes through the Earth’s shadow

Spring 2015 (4 decks)

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