14. Our Neighbours in Space
1. _______________ is the seventh planet from the sun. (Uranus/Mars)
2. Mars is also known as the ________________ planet. (yellow/red)
3. Pluto is one of the ________________ planets which was earlier considered
as a planet. (giant/dwarf)
4. The earth is the only planet on which water exists in ________________ form.
(liquid/gaseous)
B. State whether the following statements are true or false.
1. The earth has mountains, valleys, old volcano sites and many bowl-like holes
called craters on its surface.
2. The earth's axis runs from the north pole to the south pole.
3. The region of the earth near the equator receives almost the same amount of
sunlight throughout the year.
4. Ursa Major, Ursa Minor and Orion are some of the galaxies.
5. The hemisphere near the sun has shorter and warmer days because the sunrays
fall directly on it.
C. Answer the following questions.
1. Name all the planets of the solar system in the right order.
2. Give information about the following:
(a) Jupiter (b) The sun (c) Pluto (d) The moon (e) Mercury
3. How is the earth different from the other planets?
4. Explain the following terms:
(a) Equator (b) Axis (c) Orbit (d) Poles
5. How does rotation of the earth cause day and night?
6. How is revolution of the earth responsible for change in seasons? Explain with a
diagram.
7. What is a star?
8. What is an equator?
9. Why is the earth known as the blue planet?
D. Match the following.
Column A Column B
1. Venus (a) Eighth planet
2. Saturn (b) Dwarf planet
3. Mars (c) Evening star
4. Neptune (d) Planet with a system of rings
5. Pluto (e) Red planet
E. Tick the correct answer.
1. Which of these is the largest planet in the solar system?
(a) Jupiter (b) Saturn (c) Uranus
2. The imaginary line around the earth which is at equal distance from both the
poles is
(a) axis (b) orbit (c) equator
3. Which of these is the smallest planet in the solar system?
(a) Neptune (b) Mercury (c) Venus
4. Which of these is the brightest planet in the solar system?
(a) Earth (b) Mercury (c) Venus
5. Which of these planets is known as evening star?
(a) Mercury (b) Earth (c) Venus (d) Jupiter
6. Which of these is a dwarf planet?
(a) Saturn (b) Uranus (c) Pluto (d) Jupiter
F. Give one word for the following.
1. Number of days to complete one revolution
2. Smallest planet of the solar system
3. Planet with a system of rings
4. Groups of stars in the sky
5. Natural satellite of the earth
6. The largest planet in the solar system
7. Imaginary line which divides the earth into two equal parts
G. Complete the following series in which planets are arranged in increasing order
of their distance from the sun.
H. Find out eight words related to planets in the given grid. The words may read
forward, backward and across.
I. Define rotation.
J. Write an experiment to prove that rotation of the earth causes day
and night with a neat labelled diagram.
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