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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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Atoms and Atom Model
The most common use of ‘radioactivity’ is
generation of electricity
production of medicine
in agriculture
in industries
Author:
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Comment
Physical and Chemical Changes
During chemical reaction, energy is
taken in
given out
given out or taken in
transferred
Author:
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Importance of Water
Distilled water contains
poison
bacteria
minerals
pure water without minerals
Author:
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Atoms Molecules and Ions
An atom’s model that the atom is composed of electrons surrounded by a group of positive charge to balance the electrons’ negative charges is called
Thomson’s Model
Rutherford’s Model
Dalton’s Model
Bohr’s Model
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Atoms and Atom Model
The ‘isotope’ carbon-12 makes up about
90% of carbon on earth
80% of carbon on earth
99% of carbon on earth
89% of carbon on earth
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Atoms and Atom Model
To find out number of neutrons in an atom, we need to know the
atomic number
proton number
electron number
mass number
Author:
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Feeding Relationships and Environment
A collection of multiple food chains is known as
food connection
food web
food tie
food cover
Author:
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Comment
Electric Circuits and Currents
In electric motors, a coil or a wire carrying an electric current produces
electronic field
resistance
magnetic field
electronic charge
Author:
rikazzz
Comment
Investigating Space
The enormous distance prevent us seeing the stars in the universe even with a powerful
binocular
satellite
telescope
space probe
Author:
rikazzz
Comment
Electric Circuits and Currents
The higher the voltage, the more
force to each electron
power to each proton
energy to each proton
energy to each electron
Author:
rikazzz
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