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Does air occupy space?
The impurities that do not dissolve in water are called ___________.
__________ is an example of a soluble impurity.
The impurities that dissolve in water are called __________.
_________ is the purest form of water.
How does water move through the roots and stem of plants and also through the tiny blood vessels in our body?
__________ is also used as a coolant in vehicles.
Why is water called a universal solvent?
Water is rightly called an _________ of life.
___________ are examples of insoluble impurities.
Smoke and fog combine together is form ___________.
What do too much dust and smoke leads to?
_______ also contains dust particles and smoke.
How do we feel when the humidity is high?
Coastal areas have _________ humidity.
In rainy season, humidity is _________.
The amount of water vapour in the air is called ____________.
The method of changing a liquid into its vapour by heating is called ___________.
__________ is the most abundant gas in the atmosphere.
Which of the following is not a layer of the atmosphere?
Adding chroline to filtered water to kill germs is called _____________.
Which of the following methods are used to purify water in a water treatment plant?
Which is the safest and effective way to purify water?
____________ water can cause diseases.
__________ water is used in injections, medicines, car batteries, as well as in laboratories.
The method of changing a liquid into its vapours and then condensing the vapours to get the pure form of that liquid is called ___________.
___________ does not support burning.
What are the two methods of separating soluble impurities from water?
How many methods are there to separate soluble impurities from water?
A water purification process in which water is slowly poured off into another container after sedimentation is called ____________.
The method of separating insoluble impurities in a liquid by allowing them to settle down is called ____________.
Filtration is generally used to remove light, ____________ impurities from water.
In the __________ method, water with insoluble impurities is passed through a filter paper.
Which of the following methods can be used to remove the insoluble impurities in the water?
Which is the second layer of the atmosphere?
Meteoroids that burn up in the atmosphere and are not able to reach the earth’s surface are called ________.
Most ________ that enters the earth’s atmosphere slow down and burn up in Mesosphere.
The mesosphere extends from __________ km above the earth’s surface.
The layer of atmosphere above the stratosphere is ___________.
Jet planes usually fly in which layer?
The _____________ that absorbs the harmful ultraviolet rays of the sun is located in stratosphere layer.
The air in the stratosphere is less _______ than that in the troposphere.
The Statosphere extends from __________ km above the earth’s surface.
Which is the fourth layer of the atmosphere?
All weather changes take place in which layer?
The troposphere contains about ______ of all the air in the atmosphere.
The troposphere extends up to ________ km above the surface of the earth.
In which layer of the atmosphere do we live in?
The first or lowermost layer of the atmosphere is ____________.
There are ________ layers in the atmosphere.
The atmosphere is held around the earth due to the _______________ force exerted by the earth.
Beyond which layer, there is a vast empty space?
Through what the nitrogen reaches to other organisms?
__________ in the soil convert the nitrogen in the air into a form that can be used by plants.
__________ is the essential nutrient for plants and other organisms.
We need _________ present in the air to light fire.
Air contaings about 78% of _______ and 21% of ________.
The atmosphere prevents ___________ from hitting the surface of earth.
The atmosphere helps in recycling water through the ____________.
The ________ helps in maintaining the right amount of heat on earth.
The thick layer of air that surrounds the earth is called ______________.
In which layer air is very thin?
The Exosphere extends from about ______ km to the outer space.
_____________ is the fifth or outer most layer of the atmosphere.
Which layer helps us to listen to radio programs?
_________ layer is part of thermosphere.
Space shuttles orbit in which layer?
The thermosphere extends from ________ km above the earth’s surface.