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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
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Investigating Space
Scientists believe that Sun started its life about
5,000 years ago
5 million years ago
5 billion years ago
5 trillion years ago
Author:
rikazzz
Comment
Physical and Chemical Changes
After sometime the particles of solids start to move far apart, when
kinetic energy is greater than thermal energy
kinetic energy is greater than force of attraction
potential energy is greater than kinetic energy
potential energy is greater than thermal energy
Author:
rikazzz
Comment
Electric Circuits and Currents
Resistors are of
one kind
two kinds
three kinds
four kinds
Author:
rikazzz
Comment
Heat Transfer
An example of conductor of heat is
paper
cloth
air
aluminum
Author:
rikazzz
Comment
Feeding Relationships and Environment
A place where organisms can take shelter and reproduce is known as
ecosystem
habitat
community
both b and c
Author:
rikazzz
Comment
Dispersion of Light
‘Refractive index’ of quartz is
1.54
1.34
2.04
1.72
Author:
rikazzz
Comment
Heat Transfer
In fire fighting another use of thermal imaging camera is
spotting source of fire
spotting people in the fire
identifying flammable objects
identifying wood and steel
Author:
rikazzz
Comment
Investigating Space
There is only one type of star in the elliptical galaxy and that is
young stars
middle aged stars
old aged stars
supergiant red stars
Author:
rikazzz
Comment
Elements and Compounds
Non metals include
iodine
sulphur
bromine
all of above
Author:
rikazzz
Comment
Transportation in Plants
As wind blows, it takes water vapors away from plant and decreases the humidity. This process
increases the rate of transpiration
decreases the rate of transpiration
keeps the rate of transpiration same
may increase or decrease the rate of transpiration
Author:
rikazzz
Comment
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