What do moonquakes reveal about the Moon?
What do moonquakes reveal about the lunar interior? They show that the Moon might have a small, partially molten core.
Do moons have moonquakes?
A large number of very small moonquakes have been detected by the Apollo seismic network. The total seismic energy release within the moon appears to be about 80 times less than that in the earth. The moonquakes are concentrated at great depth—between 600 km and 1000 km—which is deeper than earthquakes.
Why do moonquakes happen?
Deep moonquakes happen extremely often, typically on a cycle of roughly 27 days, and occur nearly 700 km below the surface of the moon. Most believe that these are caused by the tidal pull of Earth on the moon. When the frozen crust suddenly expands, it can cause a moonquake.
What is the primary cause of moonquakes quizlet?
Moonquakes occur most often when the Moon is near perigee. What is the primary cause of moon quakes? tidal forces due to the gravitational portion on Earth. The gravitational pull of the Sun on the Moon is stronger than the gravitational pull of the Earth on the Moon.
What did scientists learn from creating artificial moonquakes?
What did scientists learn from creating artificial moonquakes? Scientists determined that the moon may have a small core of molten rock at its center. The moon has natural moonquakes that are weaker than earthquakes on Earth? What is one reason for recent renewed interest in the moon?
What theory of the Moon’s origin is favored by most astronomers today?
What is most widely accepted today is the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars. The debris from this impact collected in an orbit around Earth to form the Moon.
Is the Moon’s core hot?
At its very centre, the Moon has a solid iron core with a temperature of between 1,327°C and 1427°C. This is hot enough to create a surrounding molten liquid iron outer core, but not hot enough to warm the surface. The mantle which envelops the core is roughly 1,000 kilometres thick.
Why is the Moon shaking?
To our eyes, the moon appears to “wobble” in space because of its tilt, velocity and shape of its orbit, taking 18.6 years to complete. Half of the cycle suppresses tide activity by making high tides lower than normal and low tides higher than normal.
What is the general name for the dark roundish regions of the Moon?
The lunar maria (/ˈmɑːriə/; singular: mare /ˈmɑːreɪ/) are large, dark, basaltic plains on Earth’s Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for ‘seas’, by early astronomers who mistook them for actual seas.
What is believed to be the cause of the long wrinkles cliffs channels on the surface of Mercury?
The most widely accepted model of the origin of these faults and scarps is that they are essentially wrinkles that formed on Mercury’s surface as the planet’s heart cooled over time, leading Mercury to shrink in size.
Are moonquakes worse than earthquakes?
The largest moonquakes are much weaker than the largest earthquakes, though their shaking can last for up to an hour, due to fewer attenuating factors to damp seismic vibrations. Information about moonquakes comes from seismometers placed on the Moon from 1969 through 1972.
How do astronomers explain the formation of the Moon quizlet?
How do astronomers think the moon formed? The Impact Theory: a Mars-sized object collided with the early Earth blasting off some of the outer layers of the Earth. This material re-formed in orbit around the Earth to make the moon. The outer parts of earth was blasted off to form the moon rather than the iron core.