General Science for Class 7

Importance of Water
A larvae of a worm can get into the human body even by
ears
eyes
skin
nose
Author: rikazzz Comment
Simple Chemical Reactions
Burning of fossils fuel results in the production of
bio gas
oxygen
carbon dioxide
nitrogen
Author: rikazzz Comment
Physical and Chemical Changes
Bakelite is a good
conductor
insulator
metal
solid
Author: rikazzz Comment
Energy Resources
For heating, the more suitable flame is
luminous flame
non luminous flame
bright flame
dull flame
Author: rikazzz Comment
Atoms and Atom Model
The number of elements are approximately
fifty
eighty
hundred
two hundred
Author: rikazzz Comment
Sound Waves
Sounds of thunder and horn of lorries are known as
loud sounds
soft sounds
high pitched sounds
low pitched sounds
Author: rikazzz Comment
Electric Circuits and Currents
Small magnets are used in
switches
plugs
electric bells
fuses
Author: rikazzz Comment
Mixtures
Ink has different constituents which are soluble in
water
alcohol
chemical
drinks
Author: rikazzz Comment
Dispersion of Light
The colors on the disk are mixed
by our eyes
due to fast rotations
due to humidity
due to pressure
Author: rikazzz Comment
Sound Waves
Bats also use ‘ultrasound’ to prevent
predators
homes
preys
obstacles
Author: rikazzz Comment

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