General Science for Class 7

Electric Circuits and Currents
The wires that are used in supplying electrical energy to the consumers are made of
copper
silver
chromium
aluminum
Author: rikazzz Comment
Solutions
A common and universal solvent is
air
water
oxygen
nitrogen
Author: rikazzz Comment
Sound Waves
A hand bell stimulates the
movement of air particles
collision of air particles
vibration of air particles
energy of air particles
Author: rikazzz Comment
Elements and Compounds
Due to temperature sensitivity the element which is filled in thermometer, is
mercury
copper
helium
oxygen
Author: rikazzz Comment
Sound Waves
The loss of sound energy depends on
the density of an object
the matter it is passing through
energy level of sound
resistance in a matter
Author: rikazzz Comment
Investigating Space
Nuclear fusion takes place in the
mantle
outer core
inner core
crust
Author: rikazzz Comment
Atoms and Atom Model
The valency of ‘bromine’ is
1
2
3
4
Author: rikazzz Comment
Electric Circuits and Currents
Nichrome (mixture of nickel and chromium) resists
less electricity than copper
less electricity than aluminum
more electricity than copper
more electricity than aluminum
Author: rikazzz Comment
Importance of Water
Fresh water can be found in
lakes and streams
seas and oceans
seas and rivers
oceans and rivers
Author: rikazzz Comment
Importance of Water
In snowy regions, most of the fresh water is in the form of
vapors
snow
ice
all of above
Author: rikazzz Comment

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