Solar system questions?
Question:
a-they r very destructive,b-they can bring water to dry worlds,c-they only occured as the solar system formed,d-they can help us do remote geology
2.do solar eclipses occur at the full moon or the new moon? explain why.
3.is the far side of the moon always dark? explain.
4.On a chart of a few planets(earth, neptune, uranus), earth has the smallest mass, but the highest density. How can earth be the densest when Uranus and Neptune have so much more mass?
Answer:
1. c - asteroids and meteors can impact any world in our system anytime (we get meteors entering our atmosphere every day)
2. New moon - the moon has to be between the Earth and the sun to have a solar eclipse. When the moon is between the Earth and the sun we can't see it because the sunlit side is facing away from us (simple physics)
3. All sides of the moon get equal amounts of sunlight throughout a month. The far side was at one time called the dark side because people didn't understand that the moon rotates with respect to the sun.
4. Density is a result of the amount of mass plus the amount of space it takes up. Earth is the densest because it is composed almost completely of rock and metals (it has an iron/nickel core and iron/rock mantle and rocky crust). The water and atmosphere is a small percentage of the total mass. Metal and rock are very dense compared to gases.
The gas giants are huge, with a lot of mass, but its more spread out (since the bulk of the gas giant mass is made up of gases, and they aren't anywhere near as dense as metal or rock).
Just for simplicity's sake as a hypothetical example only: if a gas giant is 20 times Earth's mass but made up of mostly gas, it could take up maybe 100 times the space that the Earth does (mathematicians and physicists, please don't critique the numbers, this is just to demonstrate the difference in density).
1. Sorry, I can't help you.
2. It's the new moon because solar eclipses are when the moon is between the sun and Earth, which is a new moon.
3. No, the far side sometimes faces the sun.
4. Well, The outer planets are all gas planets, but the inner planets are mostly rock.
1. C(impacts still occur, their impact varies but they still occur ex. craters on moon, on mars, comits colliding with earth).
2. Any moon, the moon has to be between sun and earth. It do not needs to block the entire sun. Distance from earth of moon and its location relative to a place determines the kind of eclipse(partial or full. In some places there is partial, eclipse in some there is full at the same time, it depends on relative position).
3. The Moon is in synchronous rotation about the Earth. Synchronous rotation is a planetological term describing a body orbiting another, where the orbiting body takes as long to rotate on its axis as it does to make one orbit; and therefore always keeps the same hemisphere pointed at the body it is orbiting. The moon is in synchronous rotation about the Earth so WE can only see one side of the moon but on moon, both sides can see the sun. There is no DARK side of the moon, we call it dark because we can never see it.
4. Uranus and Neptune has much more volume than the earth. Even though they have higher masses their large volumes mean they have lower density.Most of the mass on these planets is gaseous and as gases takes up a lot of space, their density is low. Hence the density of these planets is low.
1) (a) very destructive
2) New moon, that is when the Moon is between the Sun and the Earth, and so able to block to the Sun.
3) Of course not, it gets the exact same amount of sunlight as the Earth-facing side. As the Moon orbits the Earth, all sides get exposed to the Sun.
5. There is no relationship between mass and density. Example: you are offered a choice of being hit in the head with a pound of lead or a pound of feathers. Same mass, different density.
1. C - they can and do happen even today.
2. The moon must come between the sun & Earth, so the side of the moon facing us will be completely in shadow - the answer is new moon.
3. No. It receives light from the sun just as the side that faces us - more so, in fact, because it isn t affected by ecclipses.
4. Density has nothing to do with mass; Density is based on the materials an object is made of; mass is based on the AMOUNT of material present.
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