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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
Sound Waves
The most important characteristic of a ‘music’ is its
bass effect
harmony
rhythm
scale
Author:
rikazzz
Comment
Solutions
‘Carbonates’ react with dilute acids to produce
oxygen
carbon dioxide
hydrogen
water
Author:
rikazzz
Comment
Atoms and Atom Model
As the unstable atoms break up into smaller atoms,
energy is released
radiations are released
light is released
heat is released
Author:
rikazzz
Comment
Mixtures
The solid particles which are left on filter paper while filtration is called
residue
filtrate
solvent
solute
Author:
rikazzz
Comment
Investigating Space
Asteroids are rocky, airless worlds that orbit our sun but are too small to be called
stars
planets
both a and b
celestial bodies
Author:
rikazzz
Comment
Importance of Water
The reason for presence of water underground is
oceans make tunnels due to high water pressure
due to salt in water, it starts making space in the soil for movement
some of the rain water is soaked into soil
rivers eventually run underground
Author:
rikazzz
Comment
Investigating Space
The light we see coming from a star is only a small part of
prominence
nuclear fusions
electromagnetic spectrum
fraction
Author:
rikazzz
Comment
Physical and Chemical Changes
Cooking food is an example of
condensation reaction
exothermic reaction
reversible reaction
endothermic reaction
Author:
rikazzz
Comment
Electric Circuits and Currents
Nichrome is used in electric appliances because it has
high resistance
high melting point
high resistance and melting point
high current and voltage
Author:
rikazzz
Comment
Particle Model of Matter
When solid is heated its particles begin to vibrate fast by gaining
energy
volume
mass
force
Author:
rikazzz
Comment
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