Chapter 29.1

Question 1

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

Answer 1

Sphere

Question 2

Is an elongated, closed curve with two foci

Answer 2

Ellipse

Question 3

Is earth a perfect sphere?

Answer 3

No, the equator is long than pole to pole

Question 4

What are some of the ancient observations that earth’s a sphere.

Answer 4

1. Objects fall straight down to the surface
2. Earth’s shadow on the moon during a lunar eclipse is always curved
3. People in different parts of the world see different stars above their hprizons

Question 5

What are two factors that effect gravitational pole?

Answer 5

Mass of an object and the distance between them

Question 6

Which diameter on earth pole to pole, through the equator is the greatest ?

Answer 6

The equator 42 km is the difference

Question 7

What does magnetic field protect us from ?

Answer 7

Harmful radiation

Question 8

Which magnetic pole is located in the Northern Hemisphere?

Answer 8

the south magnetic pole

Question 9

At what degrees is the axis tilted at?

Answer 9

11.7 degrees

Question 10

Can the magnetic pole reverse?

Answer 10

Yes they can

Question 11

What are the large scale of moments called where the magnetic poles changed?

Answer 11

Magnetic reversal

Question 12

On average when does magnetic reversal occur?

Answer 12

About 200,000 years

Question 13

How long ago did the last magnetic reverse happen?

Answer 13

780,000 years ago

Question 14

What part of earths magnetic field deflects harmful radiation from the sun?

Answer 14

Magnetrosphere

Question 15

What are the two scientific names of the northern lights and in the southern lights ?

Answer 15

Aurora borealis (N)
Aurora Australis(S)

Question 16

How are the auroras created?

Answer 16

Eletrically charged particles collide with atom sun the atmosphere and emit light

Question 17

What month are we closest to the sun?

Answer 17

January ( !47 million km away)

Question 18

What month is the farthest from the sun?

Answer 18

July

152 million km away

Question 19

An area 15 wide in which the time is the same

Answer 19

time zone

Question 20

The spinning of earth on its axis and imaginary line drawn from Earth’s north pole to its south pole

Answer 20

rotation

Question 21

the motion of Earth in elliptical orbit around the sun

Answer 21

revolution

Question 22

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

Answer 22

Ecliptic

Question 23

Occurs when Earth’s rotational axis is titled directly toward the sun or away for the sun

Answer 23

soltice

Question 24

Earth’s rotational axis is perpendicular to line drawn from the center of earth to the center of the sun

Answer 24

Equinox

Question 25

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

Answer 25

Babylonians

Question 26

What was the symbol for degree taken from?

Answer 26

The symbol for the sun

Question 27

How many degrees does the earth spin in one day?

Answer 27

360 degrees

Question 28

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

Answer 28

24 hours

Question 29

How many degrees does the earth spin in one hour?

Answer 29

15 degrees

Question 30

What direction does the run rise?

Answer 30

Raises in the east

Question 31

What direction does the sun set?

Answer 31

sets in the west

Question 32

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

Answer 32

False. They are modified to fit around cities,states, and country borders, and other key sities

Question 33

How many times zones are there in the world?

Answer 33

There are 24 times zones

Question 34

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

Answer 34

East

Question 35

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

Answer 35

west

Question 36

How many time zones are there in the United States ?

Answer 36

6 times zones

Question 37

What are the names of the time zones?

Answer 37

``` Eastern time Central time Mountain time Pacific time Atlantic/ Alaskan time Hawaiian time ```

Question 38

What is solar day?

Answer 38

The movement of the sun from noon one day until noon is the next day

Question 39

What is a sidereal day?

Answer 39

When earth rotates based on stars

Question 40

What are the two main reasons for seasons?

Answer 40

Earths tilt' | orbit around the sun

Question 41

Which 2 seasons have a solstice?

Answer 41

Summer and winter

Question 42

Which month is the summer solstice?

Answer 42

June 21

Question 43

Which month is the winter solstice?

Answer 43

December 21

Question 44

Which two seasons are equinoxes?

Answer 44

Spring and fall

Question 45

Which month is the spring equinox?

Answer 45

March 20 or 21

Question 46

Which month is the fall equinox?

Answer 46

September 22 or 23

Question 47

When is the longest day of the year?

Answer 47

Summer solstice June

Question 48

When is the shortest day of the year?

Answer 48

Winter socialistic December

Question 49

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

Answer 49

equinox march or September

Question 50

A rise or fall in the ocean surface

Answer 50

tide

Question 51

Reflects the change in appearance of the moon as seen from earth

Answer 51

moon phase

Question 52

occurs when the moon moves directly between the sun and earth and casts a shadow on earth

Answer 52

solar eclipse

Question 53

Occurs when earth passes between the sun and the moon and casts a shadow on the moon

Answer 53

lunar eclipse

Question 54

Are the dark colored, flat, lava filled regions on the moon surface

Answer 54

maria

Question 55

Is layer of dusty lunar material produced by collisions between asteroids and comets and the moon

Answer 55

regolith

Question 56

How many days does it take the moon to revolve around Earth?

Answer 56

27.3 days

Question 57

A complete lunar phase cycle takes 29.5 days, what is this called?

Answer 57

synodic month

Question 58

Do we ever see the back side of the moon?

Answer 58

No

Question 59

What causes a tide to rise or fall?

Answer 59

gravitational pulls of the sun and the moon

Question 60

What is the rise of sea level call?

Answer 60

High tide

Question 61

After the sea level rises how many hour does it take for the sea level drop?

Answer 61

6 hours

Question 62

Which is farther from earth? the sun or the moon?

Answer 62

The sun

Question 63

Does the moon or the sun cause a greater effect on earth's tides?

Answer 63

The moon

Question 64

How are the sun,the earth,and the moon aligned for neap tide?

Answer 64

90 degree angle or L

Question 65

How are the sun, Earth, and the moon aligned for a spring tides?

Answer 65

The sun earth and the moon is aligned in a straight line

Question 66

What does the phase of the moon you see depends on?

Answer 66

On the positions of the moon and the earth and the sun relative to one another

Question 67

When does a new moon occur?

Answer 67

When the moon is between earth and the sun

Question 68

How many phases of moon are there?

Answer 68

there are eight

Question 69

What is the definition of waxing phases?

Answer 69

the illuminated portion that we can see appears larger each night

Question 70

What is the definition of waning phases?

Answer 70

The illuminated portion that we see begins to appear smaller

Question 71

What are the moon phases called?

Answer 71

``` New waxing crescent 1st quarter waxing gibbous Full Waning gibbous 3rd quarter waning crescent ```

Question 72

What are the word month derived from?

Answer 72

From the same root word as MOON

Question 73

how is earth,moon,and sun aligned during a solar eclipse?

Answer 73

sun moon earth.

Question 74

What is an umbra

Answer 74

A shadow of the moon

Question 75

What is a penumbra?

Answer 75

You would be light in the shadow

Question 76

How is the earth,moon,sun aligned during a lunar eclipse?

Answer 76

sun earth moon

Question 77

How are the depression on the moon formed?

Answer 77

meteorites, asteroids, comets

Question 78

Are there mountains on the moon?

Answer 78

Yes

Question 79

Which side of the moon is thicker?

Answer 79

far side | dark side

Question 80

Is the mantle of the moon a solid or a liquid?

Answer 80

solid

Question 81

What did the clementine spacecraft do?

Answer 81

That the crust on the side facing Earth is much thinner than on the far side

Question 82

What did the lunar prospector do?

Answer 82

Took photograph of the surface , confirmed that the moon has a small, iron rich core about 600 km in diameter, supports the presence of water ice on the moon

Question 83

What is the Giant Impact theory?

Answer 83

The moon formed about 4.6 billion years ago when a mars sized object collided with earth