Planet Earth

Question 1

What is the shape of the earth?

Answer 1

The shape of the earth is an oblate spheroid.

Question 2

Latitude and Longitude

Answer 2

• Latitude - Horizontal lines, measured in degrees, stated as a number of degrees north or south of equator.
• Longitude - stated as a number of degrees east or west of the prime meridian - (0 degrees), vertical lines, lines are all same length.

Question 3

How do you find latitude and longitude?

Answer 3

Lines of latitude are horizontal lines and lines of longitude are vertical lines.

Question 4

Which of the earth’s internal divisions is the thinnest?

Answer 4

crust

Question 5

Which internal layer of the earth lies directly below the mantle?

Answer 5

outer core

Question 6

Which part of the earth’s surface has a latitude of 23.5 degrees north?

Answer 6

Tropic of Cancer

Question 7

What is the value of the ratio Earth’s mean diameter: Moon’s mean diameter?

Answer 7

4:1

Question 8

Which of the earth’s internal divisions has the highest temperature?

Answer 8

inner core

Question 9

What is the latitude of the tropic of cancer?

Answer 9

23.5 degrees North

Question 10

On the date of the winter solstice in the northern hemisphere, the Sun follows a path directly above a latitude of?

Answer 10

23.5 degrees South

Question 11

The Prime Meridian is a line of

Answer 11

longitude, running north-south through greenwich.

Question 12

Seeing conditions relate to the

Answer 12

Steadiness of the atmosphere when observing

Question 13

What is the latitude of the arctic circle?

Answer 13

66.5 degrees North

Question 14

Which line of latitude is 90 degrees further south from the Arctic Circle?

Answer 14

Tropic of Capricorn

Question 15

What are the earth’s four major internal divisions and features? - Crust

Answer 15

crust - very thin, thickness from 0-70km, older continental crust consists of low density rocks like granite, and younger, thinner crust consists of darker denser rocks like basalt. split up into a number of continent-sized tectonic plates.

Question 16

What are the earth’s four major internal divisions and features? - Mantle

Answer 16

mantle - lower mantle is solid, upper is semi-molten, allowing thermal convection currents to rise and fall.
outer core - temperature is 5000K, made of liquid iron with some nickel.

Question 17

What are the earth’s four major internal divisions and features? - Outer Core

Answer 17

outer core - temperature is 5000K, made of liquid iron with some nickel. Currents of charged particles that flow in outer core are responsible for Earth’s magnetic field.

Question 18

What are the earth’s four major internal divisions and features? - Inner Core

Answer 18

inner core - temp is 5500K, about same as Sun’s photosphere, high pressure prevents the iron and nickel from melting.