Solar System Quiz Flashcards
1)Fission(moon theories)
The fast spinning, molten earth lost some material, that was flung into space and formed our moon
2)co-formstion(moon theories)
The moon and the earth formed at about the same time from the debris orbiting the sun
3)capture(moon theories)
The moon was a rogue celestial body that was captured by the earths gravitation feild.
4)impact(moon theories)
During the earths early formation a planet sized object struck it. The impact destroyed the object and released debris unto space which eventually formed the moon we see today.
Moons tineline
Earth is formed 4.5 billions years ago from dust orbiting the sun
A plant sized object collides with the early earth
Ejected matter orbiting the earth forms the moon
What did meteroid bombardment cause?
Melt the surface, forming magma oceans.
Once cooled caused creaters and raised mountains
What did the largest impacts carve out
Great basins and cracked the surface enough fir the lave to flow from the moons interior
Over the last 3 billion yesrs the moons interior has been geologically in active
Only bombardment that continues to this day is from micrometeroids(size of grains of sand)
Whay does the moon have light and dark spots?
The dark spots are young plains called msria-formed by collisions from comets, meteorites and asteroids.
Ages of lunar areas
Lunar maria-3.1-3.8 billion years old
Lunar highlands-4.5 billion years
What is a meteroid?
Lumps of rocks or iron in outer soace that can vary in size
What are the maria?
When the moon was first observed through telescopes, they thought the basins were filled with water, so it was named maria(seas in latin)
What is the rille?
Trench like valleys that run through the maria bedrock
What are rays on the moon?
Consist of shattered rick and dust that were splashed out by meteroids
What is the regolith?
the soil on the moon, it means lose rock materials
Why are some areas on the moon dark and some are light coloured?
The dark coloured areas on the moon sre called maria, they are young plains composed of basalt. Basalt is a dark-coloured, fine-grained, ingenous rock. The light areas on the moon are mountains that were lifted up from the impacts if the meteroids.