chapt 29 Flashcards

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1
Q

Who devised a method of timekeeping around 3000 B.C?

A

the Babylonians.

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2
Q

What was the symbol for degree taken from?

A

The Babylonian symbol from the sun.

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3
Q

How many degrees does the earth spin in one day?

A

360 degrees.

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4
Q

How many hours does it take the earth to make one full rotation?

A

24 hours.

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5
Q

How many degrees does the earth spin in one hour?

A

15 degrees.

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6
Q

What direction does the sun rise?

A

East.

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7
Q

What direction does the sun set?

A

West.

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8
Q

True or false. All time zones are the exact same size?

A

False, they are modified to fit around cities, states, and country borders, and other key sites.

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9
Q

How many time zones are there in the world?

A

24.

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10
Q

Which direction do you move to add hours to the time?

A

East.

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11
Q

Which direction do you move to subtract hours from the time?

A

West.

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12
Q

How many time zones are there in the United States?

A

6.

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13
Q

What are the names of the time zones?

A

Eastern time, central time, mountain time, pacific time, Atlantic/Alaskan time, and Hawaiian time.

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14
Q

What is a solar day?

A

When the sun is directly above us at noon and does on full rotation to the next day noon.

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15
Q

What is a sidereal day?

A

When Earth rotates based of a star.

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16
Q

What are the two main reasons for seasons?

A

Earths tilt and orbit around the sun.

17
Q

Which 2 seasons have a solstice?

A

Summer and winter.

18
Q

Which month is the summer solstice?

A

June, 21st.

19
Q

Which month is the winter solstice?

A

December, 21st.

20
Q

Which two seasons are equinoxes?

A

Spring and Fall.

21
Q

Which month is the spring equinox?

A

March 20th or 21st.

22
Q

Which month is the fall equinox?

A

September, 22nd-23rd.

23
Q

When is the longest day of the year?

A

Summer solstice.

24
Q

When is the shortest day of the year?

A

Winter solstice.

25
Q

When are the days almost 12 hours of day and 12 hours of night?

A

March and September.

26
Q

A rise or fall in the ocean surface.

A

Tide

27
Q

Reflects the chain appearance of the moon as seen on Earth.

A

Moon phase

28
Q

When the Moon moves directly between the Sun and Earth and casts a shadow on Earth.

A

Solar eclipse

29
Q

When Earth passes between the Sun and Moon and casts a shadow on the Moon.

A

Lunar eclipse

30
Q

The dark-colored, flat, lava-filled regions on the Moon’s surface.

A

Maria

31
Q

A layer of dusty Lunar material produced by collisions between asteroids and comets and the Moon.

A

Regolith