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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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Mixtures
A substance which is made by mixing two elements without being chemically combined is called a
solute
compound
mixture
solution
Author:
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Physical and Chemical Changes
Most of the fuels such as petroleum has
carbohydrates
fats
hydrocarbons
metals
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Sound Waves
One of the three things that affects the sound produced by vibration of string is
weight of string
length of string
distance between two strings
material of string
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Sound Waves
When a note is played by a string instrument, it produces
single vibration
double vibrations
multiple vibrations
rhythm
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Feeding Relationships and Environment
Small mammals like mice, rats and rabbits come out in night to avoid
fast wind
predators
sunlight
fire in the grasslands
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Physical and Chemical Changes
Nitrogen is obtained from
gaseous air
liquefied air
solidified air
air spaces in soil
Author:
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Atoms Molecules and Ions
The total number of protons in atom of each element is called its
atomic number
atomic mass
molecular mass
atomic scale
Author:
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Mixtures
Oxygen rich air is used for
scuba diving
patients with breathing problems
cancer treatment
both a and b
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Particle Model of Matter
Who suggested that atomos were eternal and could not be destroyed.
Democritus
Aristotle
Robert brown
Albert Einstein
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Dispersion of Light
To enable you to see a rainbow the sun should be positioned
in front of you
behind you
on your left side
on your right side
Author:
rikazzz
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