Earth Science: 1st Lesson

Question 1

What are the 4 Major Spheres?

Answer 1

• Geosphere
• Biosphere
• Hydrosphere
• Atmosphere

Question 2

What is the age of the earth?

Answer 2

4.5 Billion Years Old

Question 3

What is the axial tilt of the earth?

Answer 3

23.5 Degrees

Question 4

What is the amount of light reflected of the earth?

Answer 4

36%

Question 5

What is the diameter of the earth?

Answer 5

7926.6 Miles

Question 6

What is the distance of earth from the sun?

Answer 6

93 Million Miles

Question 7

What is the orbit of the earth?

Answer 7

Elliptical

Question 8

What is the shape of the earth?

Answer 8

Oblate Spheroid

Question 9

What is the revolution of the earth?

Answer 9

365 Days (66,600 mile/hour)

Question 10

What is the rotation of the earth?

Answer 10

24 Hours (counterclockwise)

Question 11

What is the precession of the earth?

Answer 11

Wobbles

Question 12

How many effects of precession are there?

Answer 12

2

Question 13

What is the 1st effect of precession?

Answer 13

tropical year is short by 20 minutes than actual time to complete one revolution

Question 14

Tropical year is short by __ minutes than actual time to complete one revolution

Answer 14

20

Question 15

What is called the true year?

Answer 15

Sidereal Year

Question 16

What do you call the year correlated with seasons?

Answer 16

Tropical Year

Question 17

What is the 2nd effect of precession?

Answer 17

vertical rays of sun briefly cross equator before one revolution is completed

Question 18

How many days in tropical year?

Answer 18

365.24 Days

Question 19

How many days in common year?

Answer 19

365 Days

Question 20

How many days in leap year?

Answer 20

366 Days

Question 21

One complete orbit around the sun

Answer 21

Tropical Year

Question 22

-1/4 day short of complete orbit

Answer 22

Common Year

Question 23

+3/4 day over complete orbit

Answer 23

Leap Year

Question 24

366 days equals?

Answer 24

+3/4 day over complete orbit

Question 25

365 days equals?

Answer 25

-1/4 days short of complete orbit

Question 26

365.24 days equals?

Answer 26

one complete orbit around sun

Question 27

What does the part facing the sun receive?

Answer 27

Vertical Rays

Question 28

Those that curve away from the sun receives what?

Answer 28

Slanting Rays

Question 29

What do you call the unequal distribution of heat?

Answer 29

Solar Radiation

Question 30

What is the cause of unequal distribution of heat or solar radiation?

Answer 30

axial tilt of earth

Question 31

Axis of earth tilted towards sun

Answer 31

June

Question 32

Vertical rays reach tropic of cancer

Answer 32

June

Question 33

At noon, sun is directly overhead

Answer 33

June

Question 34

24-hour daylight in Arctic Circle

Answer 34

June

Question 35

Summer in N. Hemisphere

Answer 35

June

Question 36

Days are longer than nights

Answer 36

June

Question 37

Vertical rays of sun sweep over equator

Answer 37

September

Question 38

Autumn in N. Hemisphere

Answer 38

September

Question 39

Spring in S. Hemisphere

Answer 39

September

Question 40

Fall equinox

Answer 40

Septmeber

Question 41

What do you call the equal length of day and night

Answer 41

Fall Equinox

Question 42

N. Hemisphere tilted away from sun

Answer 42

December

Question 43

Vertical rays reach tropic of cancer

Answer 43

December

Question 44

Winter in N. Hemisphere

Answer 44

December

Question 45

Summer in S. Hemisphere

Answer 45

December

Question 46

"Accretion -- Release of heat from gravity -- Cool-off -- Denser materials sink in the core"

Answer 46

Formation of the Earth

Question 47

Formation of the Earth

Answer 47

"Accretion -- Release of heat from gravity -- Cool-off -- Denser materials sink in the core"

Question 48

When was earth formed?

Answer 48

4.54 billion years ago

Question 49

How is earth formed?

Answer 49

accretion of rotating disk of dust and gas

Question 50

What are the layers of the earth?

Answer 50

1. Crust 2. Mantle 3. Outer Core 4. Inner Core

Question 51

Thinnest and outermost layer

Answer 51

Crust

Question 52

What are the 2 layers of crust?

Answer 52

- Continental Crust - Oceanic Crust

Question 53

Layer of crust that is granitic?

Answer 53

Continental Crust

Question 54

Layer of crust that is basaltic?

Answer 54

Oceanic Crust

Question 55

What is the upper layer of crust?

Answer 55

Continental Crust

Question 56

What is the lower and denser layer of crust?

Answer 56

Oceanic Crust

Question 57

Region between crust and mantle

Answer 57

Mohorovicic Discontinuity

Question 58

Found beneath crust

Answer 58

Mantle

Question 59

It comprises 83% of the earth's volume

Answer 59

Mantle

Question 60

Its 2,900 km thick

Answer 60

Mantle

Question 61

How many layers of mantle are there?

Answer 61

2

Question 62

What are the 2 layers of mantle?

Answer 62

- Upper mantle - Lower mantle

Question 63

Mantle that has higher pressure and denser

Answer 63

Lower Mantle

Question 64

What do you call a weak and highly viscous layer that causes tectonic plates to move?

Answer 64

Asthenosphere

Question 65

At a convergent boundary, convection currents point ______ and roll _____ ________

Answer 65

point inward and roll plates together

Question 66

Molten liquid based on seismic data and magnetic strength

Answer 66

Outer Core

Question 67

Elements present in outer core are?

Answer 67

Iron and Nickel

Question 68

It creates magnetism

Answer 68

Iron and Nickel

Question 69

Made up of solid iron and nickel due to pressure freezing

Answer 69

Inner Core

Question 70

Responsible for earth's magnetic field

Answer 70

Inner Core