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What is the diameter of the Moon (in km)?
3500 km
What is the distance the Moon is from the Earth (in km)?
384,000 km
How long does it take the Moon to orbit once around the Earth?
27.3 days
How long is a Synodic month? (New Moon to New Moon).
29.5 days
What is the period New Moon to New Moon called?
Synodic month
What are old and dark areas on the Moon called? (They are iron-richer).
What percentage of the Moon that is "Mare"?
What is the name of the newer and brighter "highlands" on the Moon?
What percentage of the Moon that is "Terra"?
What is near the Sea of Serenity?
Sea of Tranquillity
What is North of the Sea of Tranquillity?
Sea of Crises
Where on the Moon is the Ocean of Storms?
West side
What is the effect of impacts from material left over from the Sun's accretion disc?
Name three major craters on the Moon.
Tycho, Kepler and Copernicus.
What frequently border the Maria or Seas?
What are the Apennine and Caucasus?
Major mountains
What are cracks or clefts on the lunar surface notably near Maria called?
What are very long (many km) Ridges of Maria known as?
Wrinkle Ridges
Synchronous (or captured) rotation which means it keeps the same side or face towards the body it orbits.
Rotation of Moon
What is the far side of the Moon like?
Fewer craters, less Mare
What percentage of the Moon does Libration lets us see?
What is the mass of the Moon compared to that of the Earth?
1/81 th
Why does the Moon have no atmosphere? Because of . .
its smaller gravity
What is the effect of the Moon's smaller gravity?
No atmosphere
What are used for measuring the distance to the Moon by laser, seismographs to measure moonquakes and sensors to measure solar radiation?
How far is the Moon moving away each year?
3.8 cm
When did the Apollo missions land?
1969 to 1972
The Moon was captured during a close encounter by earth's gravitational pull.
Capture Hypothesis
The Earth and Moon formed in the same nebula.
Co-formation Hypothesis
A large piece of land flew off the Earth to form the Moon.
Fission Hypothesis
What is the Hypothesis that Theia collided with the Earth and the debris formed the Moon called?
Giant Impact Hypothesis
What do Isotopes of Oxygen, lack of water (vaporised in collision), KREEP rocks show?
Giant Impact Hypothesis evidence
Where the Earth and Moon's gravity is balanced?
What does the picture show?
The Lunar phases