Unit Two - Measuring Earth

Question 1

What is the Crust?

Answer 1

The earth’s rocky and solid outer layer (Think of a hard boiled egg)

Question 2

What is the two types of crust on earth?

Answer 2

Oceanic Crust - Crust found under oceans
(More Dense and thinner - Basaltic)

Continental Crust - Crust that makes up the continents
(Less Dense and thicker - Granitic)

Question 3

What is the center of the earth?

Well, the two parts that make up the center

Answer 3

Core:

Outer Core - Liquid Iron & Nickel

Inner Core - Dense ball of solid Iron and Nickel

Question 4

What is the Rigid Mantle?

Answer 4

1. Layer just below the crust
2. Makes up the Lithosphere (Crust + Rigid Mantle)

Question 5

What is the Plastic Mantle (Asthenosphere)?

Answer 5

1. Magma can easily flow in this layer
2. Magma is partially melted because it is JUST above the melting point
3. Contains Convection Currents

Question 6

What is the Stiffer Mantle?

Answer 6

1. Largest Layer in Earth
2. Magma is harder and doesn’t flow as much/easily (Molasses, high viscosity)

Question 7

Why must scientists rely on indirect methods to study the Earth’s interior?

Answer 7

We aren’t able to dig down that far through the crust
(As soon as you dig, you will create a mini volcano because magma will squirt out)

Question 8

5 things about Latitude

Answer 8

1. Determines North and South
2. Lines NEVER Intersect
3. Latitude is first in coordinates
4. Seen at the Y-axis
5. Polaris

Question 9

Longitude (5)

0 - 180 degrees
Prime Meridian - 0
International Date Line - 180

Answer 9

1. Determines West and East
2. Line Intersect at the Poles
3. Longitude Measurements are Second
4. Seen at X - Axis
5. Time Zones

0 - 180 degrees
Prime Meridian - 0
International Date Line - 180

Question 10

Time Zones

Midnight is in the middle of the darkness, Noon is in the middle of the light. 6pm goes into the darkness and 6am goes into the light.

Answer 10

1. 24 Time Zones
2. 15 degrees apart
3. One hour apart

Midnight is in the middle of the darkness, Noon is in the middle of the light. 6pm goes into the darkness and 6am goes into the light.

Question 11

How can you measure the altitude of polaris?

Answer 11

If you are located in the Northern Hemisphere, your latitude will equal to Polaris’ altitude.

Question 12

What direction should the arrowheads in isolines go?

Answer 12

It should point at the opposite direction that the river is flowing.