Chapter 29

Question 1

sphere

Answer 1

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

Question 2

elipse

Answer 2

is a elongated, closed curve with two foci

Question 3

Is earth a perfect sphere?

Answer 3

no, because the diameter is long

Question 4

What are some pieces to ancient observations to prove that earth is a sphere?

Answer 4

objects fall straight down, earths shadow on the moon, and in every part of the world we see different stars if we were flat we would see the same thing

Question 5

What are two things that affect gravitational forces?

Answer 5

the one with bigger mass with an equal distance, and the one that is closest to the object

Question 6

Which diameter of earth is longer?

Answer 6

the equator

Question 7

What does the magnetic field do for earth?

Answer 7

protects us from harmful radiation from the sun

Question 8

Which magnetic pole is in the northern hemisphere?

Answer 8

south magnetic pole

Question 9

Can these magnetic poles flip?

Answer 9

yes

Question 10

What degrees is earths axis tilted at?

Answer 10

11.7 degrees

Question 11

What is the flipping of the north magnetic pole and south magnetic pole?

Answer 11

magnetic reversals

Question 12

How often do magnetic reversals occur?

Answer 12

200,000 years

Question 13

When was the last magnetic curve?

Answer 13

780,000 years ago

Question 14

What is a magnetosphere?

Answer 14

deflects harmful radiation from the sun

Question 15

How are the auroras created?

Answer 15

when electrically charged particles collide with atoms in the atmosphere

Question 16

What is the scientific name for the Northern Hemisphere and the Southern hemisphere?

Answer 16

Northern: aurora borealis
Southern: aurora austrais

Question 17

When is earth closest to the sun?

Answer 17

early January, about 147 million km away

Question 18

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

Answer 18

Babylonians

Question 19

What was the symbol for degree taken from?

Question 20

How many degrees does the earth spin in one day?

Answer 20

360 degrees

Question 21

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

Answer 21

24 hours

Question 22

How many degrees does the earth spin in one hour?

Answer 22

15 degrees

Question 23

What direction does the sun rise?

Answer 23

East

Question 24

What direction does the sun set?

Answer 24

West

Question 25

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

Answer 25

False, they are modified to fit around the cities, states, and country boarders, and other key sites

Question 26

How many time zones are there in the world?

Answer 26

24

Question 27

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

Answer 27

East

Question 28

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

Answer 28

West

Question 29

How many time zones are there in the US?

Answer 29

mountain time zone, eastern time zone, pacific time zone, alaskan time zone, central time zone, Hawaiian time zone

Question 30

What is a solar day?

Answer 30

The earths rotation from the sun in the sky from noon one day to noon the next day

Question 31

What is a sidereal day?

Answer 31

When a certain star rises above the horizon until that same star rises again

Question 32

What are the two main reason for seasons?

Answer 32

the axis title and how close earth is to the sun

Question 33

Which 2 seasons hace a solstice?

Answer 33

summer and winter

Question 34

Which month is the summer solstice?

Answer 34

June

Question 35

Which month is the winter solstice?

Answer 35

December

Question 36

Which two seasons are equinoxes?

Answer 36

spring and fall

Question 37

Which month is the spring equinox?

Answer 37

March

Question 38

Which month is the fall equinox?

Answer 38

September

Question 39

When is the longest day of the year?

Answer 39

During the summer solstice

Question 40

When is the shortest day of the year?

Answer 40

During the winter solstice

Question 41

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

Answer 41

during the spring equinox and during the fall equinox

Question 42

is a rise or fall in the ocean surface

Answer 42

tide

Question 43

reflects the change in appearance of the moon as seen from Earth

Answer 43

moon phase

Question 44

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

Answer 44

solar eclipse

Question 45

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

Answer 45

lunar eclipse

Question 46

these cracks become conduits for lava, which erupted and filled in the craters creating surface features

Answer 46

maria

Question 47

is a layer of dusty linar material produced by collisions between asteroids and comets

Answer 47

regolith

Question 48

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

Answer 48

27.3 days

Question 49

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

Answer 49

synodic month

Question 50

What causes a tide to rise or fall?

Answer 50

the gravitational pulls of the sun and the moon

Question 51

What is the rise of sea level called?

Answer 51

high tide

Question 52

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

Answer 52

6 hours

Question 53

Which is farther from Earth, the sun or the moon?

Answer 53

the sun

Question 54

Does the moon or the sun cause a greater effect on Earths tides?

Answer 54

moon

Question 55

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

Answer 55

the sun, the moon, and the earth are aligned straight

Question 56

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

Answer 56

90 degree angle

Question 57

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

Answer 57

the positions of the earth, moon, and sun relative to another

Question 58

When does a new moon occur?

Answer 58

when the moon is between the Earth and the Sun

Question 59

How many phases of the moon are there?

Answer 59

8

Question 60

What is the definition of waxing phases?

Answer 60

when the illuminated portion that we see appears larger each night

Question 61

What is the definition of waning phases?

Answer 61

where the illuminated light starts to appear smaller

Question 62

What are the moon phase names?

Answer 62

1st quarter, waxing crescent, new, waning cresent, 3rd quarter, waning gibbous, full, waxing gibbous

Question 63

Where is the word month derived from?

Answer 63

comes from the root word moon

Question 64

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

Answer 64

when the moon moves directly between the Sun and Earth

Question 65

What is an umbra?

Answer 65

the darkest portion of the moons shadow

Question 66

What is a penumbra?

Answer 66

a partial shadow of the moon that casted on earth

Question 67

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

Answer 67

the earth is between the sun and moon

Question 68

How are the depressions on the moon formed?

Answer 68

by meteorites, asteroids, and comets

Question 69

Are there mountains on the moon?

Answer 69

yes

Question 70

Which side of the moon is thicker?

Answer 70

the side that doesnt show

Question 71

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

Answer 71

solid

Question 72

What did the Clementine spacecraft do?

Answer 72

it comfired the thickness of the crust, and provided the mineral content on the moon

Question 73

What did the Lunar Prospector do?

Answer 73

took photos of the moons surface, confirmed the moon has a small iron rich core, collected ovidence that supports the presence of water-ice on the moon

Question 74

What is the Giant Impact Theory?

Answer 74

a mars size object collided into earth that caused debis to hit which continced into a large mass forming the moon