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Question 3:
Phases of the moon occur because
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Question 4:
Fill in the blanks:
(a) The planet which is farthest from the sun is _________.
(b) The planet which appears reddish in colour is _________.
(c) A group of stars that appear to form a pattern in the sky is known as a __ _________.
(d) A celestial body that revolves around a planet is known as a _________.
(e) Shooting stars are actually not _________.
(f) Asteroids are found between the orbits of ________ __ and _________.
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Question 7:
In which part of the sky can you find Venus if it is visible as an evening star?
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Question 10:
Draw sketches to show the relative position of prominent stars in (a) Ursa Major and (b) Orion
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Question 14:
Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?
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Question 15:
The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accommodate?
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Question 16:
Boojho made the following sketch (Fig. 17.29) of the solar system. Is the sketch correct? If not, correct it.
