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General Science
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Biological Sciences
50
Modern Materials
21
Atomic Structure
87
Energy Resources
43
Elements and Substances
76
Plant Photosynthesis and Respiration
52
Space and Solar System
230
General Science for Class 6
1155
General Science for Class 7
2197
General Science for Class 8
0
Basics of Electricity
28
Show/Hide Answers
Energy Resources
A dangerous activity which results in many deaths due to gas explosion, caves in and flooding is
coal mining
climbing mountain
extracting oil
hydropower generation
Author:
rikazzz
Comment
Physical and Chemical Changes
A reaction in which liquid freezes and its solid form changes into liquid at same temperature, is called
dual side reaction
dual side process
reversible reaction
reversible process
Author:
rikazzz
Comment
Electric Circuits and Currents
All electric objects we see around us like electric bell, electric motor, telephone and loudspeaker use electricity to make
voltage
current
magnetism
electromagnets
Author:
rikazzz
Comment
Transportation in Plants
Most of the oxygen from soil is dissolved in
minerals
water
mineral salts
roots hair
Author:
rikazzz
Comment
Human Transport System
A pacemaker is a group of cells in one of the chamber of heart. The chamber is
right ventricle
left ventricle
right atrium
left atrium
Author:
rikazzz
Comment
Feeding Relationships and Environment
Most of the flowers open in daylight so that
insects can pollinate them
they could absorb sunlight
they could transpire quickly
wind could pollinate them
Author:
rikazzz
Comment
Investigating Space
After the drainage of center, the sun will start to
cool down
heat up
grow bigger
shrink
Author:
rikazzz
Comment
Investigating Space
The brightness of a star depends not only on emission of light, but also on the
size
distance
material
hotness
Author:
rikazzz
Comment
Energy Resources
Plants material and waste from living things are regarded as
fossils fuel
bio mass
coal
crude
Author:
rikazzz
Comment
Investigating Space
The diameter of the lens of the largest telescope is
5 m
8.5 m
10.4 m
12.2 m
Author:
rikazzz
Comment
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