Planet Earth Topic 1 Flashcards
Two most common elements in Earths core?
Iron and nickel
Which of the Earths division are solid?
Crust
Inner Core
Which of the Earths division is liquid?
Mantle
Outer Core
Diameter of Earth
13000
2 most common gases in Earths atmosphere
Oxygen and Nitrogen
What can be measured using the Antoniadi Scale
Seeing conditions
How thick is the crust
0 - 50km
What volume of the Earth does the mantle take up?
85%
Temp of inner and outer core
5000K
Date of Summer Solstice?
Sun is directly above what line of latitude on this date?
21st June
Tropic of Cancer
Date of Winter Solstice?
Sun is directly above what line of latitude on this date?
21st - 23rd December
Tropic of Capricorn
Date of Spring Equinox?
Sun is directly above what line of latitude on this date?
21st of March
Equator
Date of Autumn Equinox?
Sun is directly above what line of latitude on this date?
23rd of September
Equator
Source of dust in upper atmosphere
Volcanic ash
Space debris
Sandstorms
