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Science 8th grade > February 11 Science quiz > Flashcards

February 11 Science quiz Flashcards

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Biology 101 flashcards
1
Q

What is the length of the mid-ocean ridge?

A

It is 65000 km long.

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2
Q

What does the mid-ocean ridge form?

A

The largest and longest mountain range on earth.

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3
Q

What percent of the mid-ocean is underwater?

A

I90% is underwater.

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4
Q

How deep is the mid-ocean ridge?

A

It is 2500m deep.

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5
Q

What kind of tectonic plate does the mid-ocean ridge form?

A

It is on a divergent plate.

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6
Q

What do volcanoes erupt?

A

It erupts basalt.

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7
Q

What does slow seafloor spreading cause?

A

It causes steep irregular topography.

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8
Q

What do faster-spread rates cause?

A

It causes wide and gentle slopes.

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9
Q

Where is the mid-Atlantic ridge?

A

It is in the center of the Atlantic.

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10
Q

How much does the seafloor spreading increase a year?

A

It grows about 3 to five centimeters a year.

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11
Q

What are some east pacific ridge facts?

A

Pacific ocean, fast spread, smooth volcanic summits.

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12
Q

How long is the mid-Atlantic ocean?

A

It is 65000 km long.

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13
Q

What part is the largest point of the mid-Atlantic ridge called?

A

It is called Iceland.

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14
Q

What are four continents that border the mid-Atlantic ridge?

A

South America, North America Eurasia, Africa.

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15
Q

When do convergent plate boundaries?

A

two plates collide into one another.

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16
Q

What occurs when plates move into another plate?

A

Earthquakes and volcanoes.

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17
Q

Ocean to the continent is ocean plate dancer so it will subduct, true or false?

A

It is true.

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18
Q

What happens at subduction zones?

A

Deep trenches.

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19
Q

What happens to the subducted plate?

A

It melts when it hits the mantle

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20
Q

What are examples of the continent to continent?

A

Japan, and North America.

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21
Q

What is happening when the transform plate boundaries?

A

It is sliding back and forth.

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22
Q

What is a famous transform fault?

A

It is San Andreas Fault in California.

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23
Q

In what way is the pacific plate moving?

A

It is moving north.

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24
Q

In what way is the North American plate moving?

A

It is moving south.

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25
Q

What is not created nor destroyed?

A

crust plate.

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26
Q

What is the rock that was collected on Mout Everest?

A

grey limestone, yellow marble, and granite.

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27
Q

What is the ocean floor is what?

A

It is folding up under tremendous pressure.

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28
Q

Rock is what in the conveyer belt system?

A

It is called channel flow.

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29
Q

What causes the Himalayas to go up.

A

It is called uplift.

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30
Q

How many major earthquakes have the Himalayans over the last 100 years?

A

There have been 15 earthquakes.

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31
Q

What causes mountains to shrink?

A

Erosion, and weather.

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32
Q

What do cosmic rays act like?

A

They act like cosmic sunburn.

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33
Q

How much does mount Everest grow each year?

A

It grows.25 inches a year.

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34
Q

`Who came up with the idea of continental drift?

A

It was Alfred Wegner.

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35
Q

What does Pangea mean?

A

It means supercontinent.

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36
Q

When did the Pangea exist?

A

It existed millions of years ago.

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37
Q

What do continents fit together like?

A

They fit like puzzle pieces.

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38
Q

Where are mountain ranges formed?

A

On opposite sides of the Atlantic ocean.

39
Q

Where is the midnight zone begin?

A

3300 feet deep.

40
Q

What temperature is it in the midnight zone?

A

39 ferinhight.

41
Q

How deep is the challenger deep?

A

It is 7035 feet deep.

42
Q

What is the lowest point in the Mariana trench?

A

It is called challenger deep.

43
Q

How long does it take to get to challenger deep?

A

It takes 20 minutes.

44
Q

What are the deepest ocean trenches in the Pacific?

A

The deepest ocean trenches are called the Ring of Fire.

45
Q

What is the more common ocean on the ocean, or continent to ocean?

A

It is more common to have a continent to the ocean.

46
Q

How many tones are in challenge deep?

A

eight tons of pressure per square inch.

47
Q

What were oceans originally called?

A

they were originally called deeps.

48
Q

What is a trench in the seafloor?

A

It is called a topographic depression.

49
Q

What shape is the seafloor called?

A

It is crescent-shaped.

50
Q

What part of the ocean is closest to the center of the earth?

A

The Arctic ocean.

51
Q

What is the tallest mountain from the base to the summit?

A

It is Mauna kea.

52
Q

How tall is Mauna kea?

A

It is 10200m tall.

53
Q

What does Everest have?

A

The highest altitude from sea level up?

54
Q

What is the third factor to shape mountains is what?

A

It is climate.

55
Q

What has been found in the Himalayas?

A

It is fossils of sea creatures.

56
Q

What do the Himalayas mean?

A

It means home of the snow.

57
Q

Is mount Everest named for a man who first claimed the Mountain?

A

No.

58
Q

What was the first successful year to climb the peak of Mount Everest?

A

It was the year 1953.

59
Q

What is the acronym for the layers of the earth?

A

Lost ants march over ice.

60
Q

What is the compositional layer?

A

It is the oceanic and continental crust, mantle, and core.

61
Q

Continental crust is what?

A

Thicker but less dense.

62
Q

Oceanic crust is what?

A

It is thinner but denser.

63
Q

What does the lithosphere include?

A

It includes all crust and upper mantle.

64
Q

What is Asthenosphere?

A

It is sluggish and likes oobleck or toothpaste.

65
Q

What is the outer core?

A

It is liquid.

66
Q

What is the inner core made of?

A

It is made of Nickle and iron.

67
Q

Who discovered continental drift?

A

Wegner.

68
Q

What do convection cells do?

A

The rising and sinking of hot magma and it heats, it gets less dense and then cols and gets denser in the mantle.

69
Q

What are the three types of plate boundaries?

A

Divergent, convergent, and transform.

70
Q

What do divergent forms?

A

It forms mid-ocean ridges and seafloor spreading.

71
Q

What do transform plates do?

A

They are a common reason for earthquakes because plates get stuck.

72
Q

What do convergent plates form?

A

They create volcanoes and mountains and trenches.

73
Q

What does subduction do?

A

It is when dense plates sink below the less plates sliding back into the mantle.

74
Q

What does subduction do?

A

It recycles the earth.

75
Q

What is the Marina trench about?

A

It is 7 miles at the deepest point, and temperature just above freezing, 3 hours to explore, In Pacific ocean, 5 people have gone down.

76
Q

Who discovered seafloor spreading?

A

Harry Hess.

77
Q

What are Appellation features?

A

rounded, colorful trees, 4 seasons, tallest peak, 6400 fr, Main to both Georgia and is 2,000 miles long and had wildfires.

78
Q

What is Rocky Mountain features?

A

Canada to New Mexico, talkest peaks over 14000 ft, snow-capped, jagged, steep, lot os rivers/lakes, western US, and 3000 miles long, and has wildfires.

79
Q

What are the Himalayas mountain features?

A

In Asia, where Indian and Eurasian plates crash, jagged and steep, many rivers are 20000 km long.

80
Q

What do earthquakes cause?

A

They cause tsunamis and fires.

81
Q

What did Karatoa do?

A

It erupted making the loudest noise recorded in history.

82
Q

What did the Karatoa have on the effects on the ecosystem?

A

It cooled the temperature of the world and made the sun cover for five days.

83
Q

What color sunsets did it make?

A

It made red sunsets.

84
Q

What was the island that took karate as the place?

A

Anak Krakatoa.

85
Q

Where do 90% of the world’s earthquakes happen?

A

They happen in the Ring of Fire.

86
Q

What causes earthquakes in Japan?

A

Ocean to ocean boundaries.

87
Q

What percent of earthquakes happen in interplates?

A

5%.

88
Q

Where are Nashville and Memphis near?

A

They are near the Madrid fault zone.

89
Q

Can you have an earthquake without a fault?

A

No, you can not.

90
Q

How many of the US states have moderate to high quake risk?

A

40 out 0f 50 states.

91
Q

What state had the largest ever recorded earthquake?

A

Alaska.

92
Q

How many minutes did the Sumatran earthquake last?

A

7 minutes.

93
Q

Where are most volcanos found?

A

Most are found in the Ring of Fire.

94
Q

What percent of volcanoes happen in the Ring of Fire?

A

75%.

Science 8th grade (6 decks)

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