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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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Sound Waves
Two similar string instruments are
piano and guitar
piano and violin
guitar and violin
harp and piano
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Sound Waves
Sound is made louder by increasing
wavelength
frequency
wave front
amplitude
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Investigating Space
In the sun, a process that produces huge amount of energy takes place. It is called
nuclear fusion
nuclear fission
atomic explosion
hydrogen explosion
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Investigating Space
For all hydrogen to be used up, it will take more than
5,000 years
5 million years
5 billion years
5 trillion years
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Heat Transfer
At night, warm air rises over
land
sea
trees
ground
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Sound Waves
‘Dolphins’ can capture their prey using
echo
infrasound
eye sight
ears and sensors
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Atoms Molecules and Ions
A theory of movement of electrons in a fixed orbit around nucleus was given by
Thomson’s Model
Rutherford’s Model
Dalton’s Model
Bohr Model
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Human Transport System
The blood has to distribute among all the cells of a body by arteries so they are divided into millions of tiny
arteries
veins
capillaries
nerves
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Human Transport System
The function of the valves is to
transfer the blood from atria to ventricles
stop the backflow of blood
help chambers to contract
help chambers to relax
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Reproduction in Plants
The process of growth of seed in a plant is known as
pollination
reproduction
germination
fertilization
Author:
rikazzz
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