Download SST Worksheet - 3

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A.M.JAIN SCHOOL, MEENAMBAKKAM, CHENNAI-114
STD: VII
SUB: SST
TOPIC: MOVEMENTS OF THE EARTH
I. FILL IN THE BLANKS:
1. A leap year has ___________ number of days.
2. The spinning movement of the earth is _________
3. The sun’s rays fall vertically on the Tropic of _________ on 21st
June.
4. Days are shorter during the ___________ season.
5. The changes in the seasons is due to ____________
6. 21st March is known as ___________ equinox.
7. _____________ sailed around the world and showed that the earth is
spherical.
8. A __________ is the model of the earth.
9. The northernmost point of earth’s axis is known as the ___________ and
the southernmost point is called the _______________.
10. The earth takes __________ days to complete one revolution.
11. 21st June and 22nd September are known as ___________.
12. During the December Solstice, the sun’s rays shine on the
_____________________.
13. An eclipse occurs when the ________, __________ and
________________ fall in the same line.
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14. The Solar Eclipse occurs only during a ______________.
15. The Lunar Eclipse occurs only during a ______________.
II. CHOOSE THE CORRECT ANSWER:
1. The movement of the earth around the sun is known as
(a) Rotation
(b) Revolution
(c) Inclination (d) seasons
2. Direct rays of the sun fall on the equator on
(a) 21st March (b) 21st June (c) 22nd December (d) 11th January
3. Christmas is celebrated in Summer in
(a) Japan (2) India (3) Australia
(4) America
4. The longest day and the shortest night in Northern Hemisphere occur on
(a) 21st March (2) 21st June (3) 22nd December (d) 21st January
5. Spring equinox is on
(a) 21st June (b) 23rd September (c) 22nd December (d) 21st March
6. During the equinox every place on the earth has
(a) equal days and nights (2) longer days and shorter nights (c) shorter
days and longer nights (d) none of these.
7. How much is the earth tilted towards orbital plane
(a) 25½
(b) 24º
(c) 23½
(d) 60º
8. When the earth completes one spin on its axis in 24 hours, it is called
(a) revolution
(b) year
(c) rotation (d) season
9. Which movement of the earth causes seasonal changes?
(a) rotation
above.
(b) tilt of the earth’s axis
(c) revolution (d) none of the
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10. The eclipse when the moon may turn reddish.
(a) solar eclipse
above
(b) lunar eclipse (c) total eclipse
(d) none of the
III. WHAT DO THE FOLLOWING ANAGRAMS STAND FOR?
1. Bit Or
-
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2. Close Sit
3.Quine Ox
-
4. Ratio Not
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5. Olive Run To IV. GIVE REASON:
1. What will happen if the earth’s axis was not inclined?
V. USE THE CORRECT WORD FROM THE BOX TO COMPLETE THE
SENTENCES IN THE FOLLOWING PARAGRAPH.
Reflecting
Sun
Water
Tides
Third
Moon
Eclipse
Gravity
Phases
Star
We live on the __________planet from the sun – planet Earth. One of the
unique characteristics of Earth is that it contains abundant liquid
____________. The force of ___________ holds planets in orbit, and pulls
objects towards the centre of Earth. All the plants in our solar system
revolve around the ________. The sun is actually Earth’s nearest
________. The _________ orbits the Earth. When we see the moon it is
_________ light from the sun. The different shapes of the moon we see
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are called ________ of the moon. When Earth is directly between the
moon and the sun and a shadow is cast on the moon, a lunar _________
occurs. The interaction of moon and Earth is responsible for _________
the regular rise and fall of ocean levels.
VI. VOCABULARY:
USE THESE WORDS TO FILL IN THE BLANKS NEXT TO THE
SENTENCES BELOW:
Solar eclipse
Phases
Waxing
Moon
Lunar eclipse Sun
Earth
Waning
Tides
Full moon
1.__________ planet which contains abundant liquid water.
2. __________ the only star in our solar system.
3. __________ object which orbits Earth and reflects light of the sun.
4. ____________ different shapes of moon which appear to us on Earth.
5. ___________ the process of the moon appearing bigger over time.
6. ___________ The process of less and less of moon appearing to us over
several days.
7. ____________ the phase of the moon in which the entire moon appears
illuminated.
8. ____________ occurs when the sun’s light is totally or partially blocked
by the moon, and casts a shadow on a portion of Earth.
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9. _____________ occurs when the Earth, moon and sun are directly
aligned, and a shadow is cast on the moon.
10. ______________ the rise and fall of ocean levels about every 12½
hours.
VII. READ THE PASSAGE AND ANSWER THE FOLLOWING:
Rotation is the movement of the earth in a circular motion around the axis
line while the movement of the earth around the sun in a fixed path or orbit
is called revolution.
1. What is the impact of rotation and revolution of the earth?
2. What will happen if the earth did not rotate?
VIII. ANSWER IN ONE WORD:
1) What is the model of the earth? ___________
2) How many movements are there? __________
3) What causes seasons? ______________
4) What causes day and night? _________
5) In which direction earth rotates? ____________
6) In which season the leaves turn red and brown before falling off the
trees? ___________
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7) In which planet the sun rises in the west and sets in the east?
______________
8) Which eclipse is harmful to look at directly? _______________
9) Which eclipse occurs more frequently? _______________
10)
Which eclipse occurs on full moon day? ___________
11)
Which eclipse occurs on new moon day? ___________
12)
In which solstice the sun’s rays shine on the Tropic of
Cancer? _____________.
13)
In which solstice the sun’s rays shine on the Tropic of
Capricorn? _____________.
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