8th (VIII) Stars and The Solar System (Physics)
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Oral questions for
Formative and Summative Assessments
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Q.1.Name the planet
appears I the northern sky before sun rise?
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Ans: Venus brightest
of all planets
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Q.2. Name the planet
which has 28 moons?
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Ans: Jupiter manly
consist of hydrogen and helium gases
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Q.3. In which direction
stars move except Polar star?
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Ans: When seen from
earth stars appears to move from east to west.
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Q.4. Why pole star
appears stationary?
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Ans: As it lies on
the imaginary axis of the rotation of the earth.
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Q.5.Which two planets
have asteroids between them?
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Ans: asteroids are
the rocks pieces that revolve around the sun between the orbit of Mars and
Jupiter.
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Q.6. Which comet visit
the earth after 76 year?
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Ans: Halley’s comet.
Heavenly bodies that revolve around the sun and appears as bright as glowing
ball with a long tail is called comet.
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Q.7.What happen to
meteors when enters the earth’s atmosphere?
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Ans: meteors when
enters the earth’s atmosphere starts glowing and are seen as a bright steak
of light fleshing momentarily across the sky.
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Q.8.What is the high
tog geostationary satellite from the earth surface?
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Ans: 36000km and
used for satellite communicacation.
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Q.9. What does term
INSAT mean?
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Ans: Indian National
Satellite.
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Q.10.Name the first
Indian satellite launched success fully.
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Ans : Aryabhata on
19 april,1975
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Q.11. Some stars are bright and some are dim; some stars look white while
some may look blue and some red. why?
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Answer: Stars differ
in apparent brightness for two reasons; one is that they are at different
distances and the other is that they differ in their intrinsic (actual) brightness
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Fill in the blanks
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1. The
distance of the sun from the earth is nearly ----------
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Answer: 1.5 x 108 km
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2. Light
takes about ----------- to travel from
the sun to the earth
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Answer: 8 minutes
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3. The
sun rotates from west to east with a period of about ---------
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26 days
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4.The
visible disc of the sun is called ------------
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Answer: photosphere
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5. The
layer just above the photosphere is called the --------------
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Answer: chromosphere
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6. The region
beyond chromospheres is called -------------
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Answer: corona
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7. The total energy
emitted by a star in one second is called its ----------
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Answer: luminosity
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8. -------------- is the study of the
universe. It deals especially with the search for suitable theories to
understand the observed universe, its origin and its future.
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Answer: Cosmology
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