Topic 1 (Planet Earth) Flashcards
1
Q
What is the shape of the earth
A
Oblate sphereoid
2
Q
What is the mean diameter of the earth
A
13,000km
3
Q
What are the major divisions of the Earth’s surface
A
Equator Tropic of cancer Tropic of capricorn Arctic circle (66.5N) Antarctic circle (66.5S) North pole South pole Prime meridian
4
Q
What is skyglow
A
Light pollution
5
Q
What is twinkling
A
The appearance of the stars caused due to Seeing conditions caused by turbulent air
6
Q
How does the atmosphere affect sky colour
A
Blue light is scattered more as it travels in shorter waves so the sky is predominantly blue
7
Q
What vertical tilt is the earth on on its axis
A
23.5 degrees
