Topic 1 - Planet Earth

Question 1

What shape is the Earth

Answer 1

Oblate spheroid

Question 2

What is the mean diameter of the Earth

Answer 2

13000km

Question 3

What are the 4 main inner layers of the Earth

Answer 3

Crust, Mantle, Outer Core and Inner Core

Question 4

What are some features of the crust

Answer 4

It has: 2 types being continental and oceanic, it’s made up of rock like iron or granite.

Question 5

What are some features of the mantle

Answer 5

It has: Reaches temperatures of 4000*c , made up of solid nickel, where convection currents take place.

Question 6

What are some features of outer core

Answer 6

It has: Reaches an average temperature of 4500c and 5500c , 2260km thick, made up of liquid nickel and other metals.

Question 7

What are some features of the inner core

Answer 7

It has: An average temperature of 5000c and 6000c, it’s 1100km thick, it’s solid + made of nickel and iron

Question 8

What is the latitude

Answer 8

The angular distance of a place north or south of the earth’s equator, or of the equator of a celestial object, usually expressed in degrees and minutes.

Question 9

What is longitude

Answer 9

The angular distance of a place east or west of the Greenwich meridian, or west of the standard meridian of a celestial object, usually expressed in degrees and minutes.

Question 10

What is a meridian

Answer 10

An imaginary north-south line in the sky that an observer can use as a reference point for astronomical observations

Question 11

What is the Zenith

Answer 11

The point in the sky or celestial sphere directly above an observer.