1. How are craters formed on the Moon's surface?
2. What are the effects of absence of atmosphere on the Moon?
3. Why is the Moon not visible to us on the new moon night?
4. How are tides caused?
5. Name any two kinds of artificial satellites.
6. What do astronauts have to learn before going into spaces
Answers
Answer:
Explanation:
ANS:1)Craters are the most common surface features on many solid planets and moons—Mercury and our Moon are covered with craters. This portion of the Moon is covered by numerous circular holes. These are impact craters, each of which was formed when an asteroid or comet collided with the Moon's surface.
ANS:2)Our Moon doesn't have an atmosphere because it is too small and doesn't have a strong magnetic field. Any atmosphere it might have had would be stripped away by the solar wind that barrages the small world. In contrast, our planet has more mass to hold its atmosphere close, and a strong magnetic field to protect it.
ANS:3)A new moon occurs when the Moon is between the Sun and the Earth. The far side of the Moon is in full sunlight and the near side of the Moon receives no sunlight. ... Sunlight illuminates the atmosphere so much that the dark face of the new moon can't be seen.
ANS:4)Tides are caused by gravitational pull of the moon and the sun. The rise and fall of the tides play an important role in the natural world and can have a marked effect on maritime-related activities.
ANS:5)Types of satellites
Navigation satellites. The GPS (global positioning system) is made up of 24 satellites that orbit at an altitude of 20,000 km above the surface of the Earth. ...
Communication satellites. ...
Weather satellites. ...
Earth observation satellites. ...
Astronomical satellites. ...
International Space Station (ISS)
ANS:6)During training, astronauts are familiarized with the engineering systems of the spacecraft including spacecraft propulsion, spacecraft thermal control, and life support systems. In addition to this, astronauts receive training in orbital mechanics, scientific experimentation, earth observation, and astronomy.
Explanation:
1) craters are formed when an astroid or meteor hits the moon.
2) the absence of atmosphere makes it difficult for life to exist on moon and also does not prevent the meteors or astroids from hitting its surface.
3) the moon does not have its own light, it reflects the light that falls on it. so, when the moon is at an angle in which it cannot reflect the light on earth, we do not see the moon, thus we do not see a moon on a new moon night.
4) tides are caused due to the gravitational pull of the moon. this is the same reason why the tides (waves) are the highest in peek at night.
5) the 2 kinds of artificial satellite are: sputnik 1, ISS (international space station), weather satellite, GPS etc.
6) astronauts will have to learn to control space crafts, live in 0 gravity, how to conduct experiments and observations.
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