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Stars and the Solar System Test - 17

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Stars and the Solar System Test - 17
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The fourth planet from the Sun is _______ .
    Solution
    The eight planets in the solar system in their order of distance from the Sun are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
  • Question 2
    1 / -0
    Fill  in the blank:

    The smallest part of the moon that appears in the sky is called ________.
    Solution
    The smallest part of visible moon is called crescent moon. It appears after and before the new moon day. This occurs because of continuous change in the shape of the bright part of the moon. This change is called phases of the moon.
  • Question 3
    1 / -0
    Why can life not exist on Moon?
    Solution
    For life to exist, water is very essential. However, there is no water as well as no atmosphere on the Moon. Hence, life cannot exist on Moon.
  • Question 4
    1 / -0
    Match the columns
    AB
    (1) Speed of light(a) 4.3 light years away from earth
    (2) Light year               (b) 300,000 km/s
    (3) Sun(c) Nearest star
    (4) Alpha Centauri(d) distance travelled by light in one year
    (e) 18 light minutes away from the Earth
    Solution
    The speed of light is 300,000 km/s.
    A light-year is a distance traveled by light in one year.
    Sun is the nearest star to Earth.
    Alpha Centauri is the second nearest star which is 4.3 light-years away from Earth.
  • Question 5
    1 / -0
    Fill in the blanks:

    _________ was the first man to land on Moon on ________.
    Solution
    Neil Armstrong was the first astronaut to land on Moon on July 21, 1969 as per Indian time.
  • Question 6
    1 / -0
    How is the Moon's surface?
    Solution
    The surface of the moon according to the astronauts is dusty and barren. The moon's surface is covered with dead volcanoes, impact craters, and lava flows.
  • Question 7
    1 / -0
    Surface of the Moon is
    Solution
    According to the astronauts the surface of the Moon is rough, dusty, barren and irregular. It has large craters on its surface and many steep and high mountains.
  • Question 8
    1 / -0
    Fill in the blank:

    There are many _______ on the surface of the moon.
    Solution
    There are many craters of different sizes on the surface of the Moon.
  • Question 9
    1 / -0
    The size of the visible part of the Moon, after the full moon day till the new moon day.
    Solution
    The moon revolves around the Earth from East to West. Along with the Earth, it also revolves around the Sun. Moon does not have its own light. Hence, we can see only that part of the moon that is illuminated by the Sun. When the moon is in the East, it lies somewhere between the Earth and the Sun. Thus the illuminated part faces the Sun and the dark part faces the Earth. Thus we cannot see any moon in the sky. This is the new moon day. After this, gradually the Moon starts moving towards the West through North. As it moves in this path, the illuminated part of the Moon gradually faces the Earth and we see the phases of the Moon from the new moon, to the crescent moon. Then half-moon, and finally the full moon, when it reaches the West, in the West, the entire illuminated part of the moon faces the Earth and it is the full moon day. Then the moon gradually starts moving towards the east once again through south and the visible part of the moon goes on decreasing in the same manner until the new moon day and the cycle keeps repeating itself. Thus we see the phases of the Moon. It takes 15 days for the moon from new moon day to full moon day and another 15 days from full moon day to new moon day.
  • Question 10
    1 / -0
    On which day is the whole disc of the Moon visible?
    Solution
    On a full moon day, the entire bright or illuminated part of the Moon faces the Earth. Hence it is visible as a whole disc.

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