General Science for Class 7

Heat Transfer
The objects those are warmer than their surroundings
gain heat
lose heat
transfer heat
share heat
Author: rikazzz Comment
Dispersion of Light
An example of a device in which convex lens is used, is
mirror
telescope
spectacles
contact lenses
Author: rikazzz Comment
Human Transport System
White blood cells live long because they have
centrioles
white color
nucleus
cell membrane
Author: rikazzz Comment
Atoms Molecules and Ions
Molecules which contain fixed number of same type of atoms are molecules or
elements
compounds
mixtures
all of them
Author: rikazzz Comment
Sound Waves
The full name of ultrasound is
ultra high sounds
ultra pitch sounds
ultrasonic sounds
ultraviolet sounds
Author: rikazzz Comment
Energy Resources
Bio gas is a renewable source of
energy
heat
light
fossil
Author: rikazzz Comment
Elements and Compounds
Sodium and chlorine react together to form
sodium chloride
sodium oxide
sodium carbonate
sodium nitrate
Author: rikazzz Comment
Reproduction in Plants
Pollen grains of insects pollinated flowers are
sticky and light weight
light weight and in a huge quantity
light weight and huge
sticky and huge
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Solutions
Grapes contain
ethanoic acid
acetic acid
citric acid
tartaric acid
Author: rikazzz Comment
Human Transport System
The task of pacemaker is to
pump heart
produce electricity
help chambers to push blood
open the valves
Author: rikazzz Comment

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