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Why is the atmosphere much rarer on the moon than on the earth?
The atmosphere on the moon is much rarer and the temperatures on the moon are extreme ranging from boiling hot to freezing cold depending on the area of moon’s surface exposed to sunlight. The atmospheric gases on the moon are very much rarer on the moon.
As moon rotates on its axis in about 27 days, lunar day-time is about 13.5 earth days and lunar night-time is about 13.5 earth nights. The lunar atmosphere varies depending upon these lunar day and night times also.
The gases on the earth remain in the earth’s atmosphere because of the gravitational pull acting on. These form a thick blanket around the Earth’s surface. Moon has very low gravity compared to earth, because of which the atmosphere on the moon is very thin.
This rarer atmosphere is called as an Exosphere, which doesn’t hold many gases, while the ones present there are widely spread out and hence they rarely collide with each other. If we compare, there are only 100 molecules per cubic meter on the moon’s atmosphere, while there are 100 billion molecules on the Earth’s atmosphere.
Because of the thin atmosphere on the moon, the dust layers or footprints are not easily erased. Because of this scarce atmosphere, the moon doesn’t maintain its temperatures for long. They vary so widely that the sunny side of the moon would be 273°F (134°C) while the temperatures of the dark side would plummet to 243°F (-153°C).
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- The value of g on the surface of the moon:(a) is the same as on the earth (b) is less than that on the earth(c) is more than that on the earth (d) keeps changing day by day
- The mass of the body on earth is $60\ kg$, what is its weight on the earth and on moon.
- How much is the weight of an object on the moon as compared to its weight on the earth? Give reason for your answer. It is quite difficult to lift heavy weights on the earth but it becomes very easy to lift the same heavy weights on the moon. Why?
- Why is the weight of an object on the moon $( \frac{1}{6})^{th}$ it's weight on the earth?
- If the moon attracts the earth, why does the earth not move towards the moon?
- What is the value of gravitational constant G (i) on the earth, and (ii) on the moon?
- Gravitational force on the surface of the moon is only $\frac{1}{6}$ as strong as gravitational force on the earth. What is the weight in newtons of a $10\ kg$ object on the moon and on the earth?
- If the mass of the moon is 1/100 th the mass of the earth and the radius of moon is 1/4th to the radius of earth , what is the ratio of acceleration due to gravity on earth to that on the moon?
- Why moon revolves around the earth and not around the sun? As the force of attraction between the sun and moon is greater than the force of attraction between earth and moon.
- Fill in the following blanks with suitable words:(a) The acceleration due to gravity on the moon is about .................... of that on the earth.(b) In order that the force of gravitation between two bodies may become noticeable and cause motion, one of the bodies must have an extremely large .......................(c) The weight of an object on the earth is about .............. of its weight on the moon.(d) The weight of an object on the moon is about ..................... of its weight on the earth.(e) The value of g on the earth is about ............... of that on the moon.(f) If the weight of a body is 6 N on the moon, it will be about................on the earth.
- If the weight of a body on the earth is $6\ N$, what will it be on the moon?
- The day is longer on the earth by about 4 minutes because:(a) the earth is round in shape (b) the earth rotates on its axis(c) the earth revolves around the sun (d) the earth has atmosphere
- If the weight of an object is 6N on earth, then what will be its weight on the moon?
- 1. The mass of the moon is about 0.012 times that of the earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:a) In Same as that on the earthb) About one-fifth of that on the earthc) About one-sixth of that on the earthd) About one-fourth of that on the earth2. An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F 2 is the magnitude of the force exerted by the apple on the earth, thena) F1 is very much greater than F2b) F2 is very much greater than F1c) F1 and F2 are equald) F1 is only a little greater than F2
- No sound can be heard on the moon. Why?
