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Physical Science > 29.2 > Flashcards

29.2 Flashcards

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1
Q

Time Zone

A

An are 15 degrees wide in which time is the same.

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2
Q

Rotation

A

Spinning of the Earth on its axis

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3
Q

Revolution

A

The motion of Earth in an elliptical orbit

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4
Q

Ecliptic

A

Defined as the plane of Earth’s orbit around the sun.

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5
Q

Solstice

A

Occurs when Earth’s rotational axis is tilted directly toward the Sun or away from the Sun.

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6
Q

Equinox

A

Earth’s rotational axis is perpendicular to a line drawn from the center of the Earth to the center of the Sun.

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7
Q

When is the earth furthest away from the sun?

A

July

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8
Q

When is the Earth closest to the sun?

A

January

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9
Q

How are auroras created?

A

Electrically charged particles collide with atoms in the atmosphere and emit light

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10
Q

Scientific name for the northern and southern lights?

A

Northern- Aurora Borealis

Southern- Aurora Australis

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11
Q

Within Earth’s magnetic field, deflects

A

Magnetosphere

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12
Q

When was the last magnetic reversal?

A

780,000 years ago

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13
Q

How often do magnetic reversals happen?

A

Every 200,000 years

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14
Q

What is it called when magnetic poles switch

A

Magnetic Reversals

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15
Q

Can magnetic poles flip

A

Yes

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16
Q

At what degree is Earth’s axis tilted

A

11.7 degrees

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17
Q

Which magnetic poles is located in the South Pole

A

North magnetic pole

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18
Q

Which magnetic pole is located in the north pole

A

In the south magnetic pole

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19
Q

What does the magnetic field protect the Earth from?

A

Harmful radiation

20
Q

What are two factors that effect gravitational pull?

A

Mass and distance

21
Q

Sphere

A

A round, three-dimensional object, the surface of which is the same distance from the center in all directions

22
Q

Ellipse

A

an elonged, closed curve with two foci

23
Q

Who devised a method of timekeeping around 300 B.C

A

Babylonians

24
Q

What was the symbol for degree taken from?

A

Their symbol for the Sun

25
Q

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

A

24 hours

26
Q

How many degrees does the earth spin in one hour?

A

15 degrees

27
Q

What direction does the sun rise?

A

East

28
Q

What direction does the sun set?

A

West

29
Q

True or False: All time zones are the exact same size?

A

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

30
Q

How many time zones are there in the world?

A

24 time zones

31
Q

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

A
32
Q

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

A
33
Q

How many time zones are there in the United States?

A

6 time zones

34
Q

What are the names of the time zones?

A 
Atlantic/ Alaskan time zone
Pacific time zone
Mountain time zone 
Central time zone 
Eastern time zone 
Hawaiian time zone
35
Q

What is a solar day?

A

When we look at the sun at noon one day to noon the next day

36
Q

What is a sidereal day?

A

Look at a certain star above the hemisphere on night to the next night.

37
Q

What are the two main reasons for the seasons?

A

Remind students that the two reasons seasons occur are the tilt of a planet’s axis and its orbit around the sun.

38
Q

What two seasons have a solstice?

A

Winter and Summer

39
Q

Which month is the summer solstice?

A

June 21st

40
Q

Which month is the winter solstice?

A

December 21st

41
Q

Which 2 seasons are equinoxes?

A

Spring and Fall

42
Q

Which month is the spring equinox?

A

March 20/21

43
Q

Which month is the fall equinox?

A

September 20/21

44
Q

When is the longest day of the year?

A

Summer solstice, June 21st

45
Q

When is the shortest day of the year?

A

Winter solstice, December 21st

46
Q

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

A

The equinoxes, March 21 or 22 and September 21 or 22 orrr 23

Physical Science (14 decks)

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