Paper 1: Planet Earth Flashcards
1
Q
What is the shape of the earth
A
Oblate Spheroid
2
Q
What is the mean diameter of the earth
A
1300km
3
Q
What are the different layers inside the eath
A
crust
mantle
outer core
inner core
4
Q
What is the average thickness of the crust
A
0-70km thick
5
Q
What is the average thickness and temperature of the outer core
A
2300km
5000K
6
Q
What is the average thickness and temperature of the inner core
A
1200km
5500K
7
Q
What is an equinoxes and when are they
A
A day of equal length and night due to the sun lying directly over the equator
21st of March, 23rd of September
8
Q
What are solstices and when are they
A
When the sun lies directly over the tropics of Cancer and Capricorn
21st of June and 21st of December
9
Q
What are S-waves
A
