It is formed due to incomplete combustion
burning of fuel in the presence of air
amarjot2
Asked:
December 2022
without the presence of. .................combustion cannot take place.
amarjot2
Asked:
December 2022
The process of seeping of water into the ground is called. . . . . . . . . a. infiltration b.depletion c.fillingd.regeneration
amarjot2
Asked:
December 2022
Think and Answer:1.Deforestation is a cause of depletion of water table.Do you agree?Why/Why not?2.According to you,which method is the most promising in raising the water table in your city?3.Why do we need to conserve water?
amarjot2
Asked:
December 2022
Name the following :1. The uppermost branches and leaves of tall tree which act like a roof or umbrella over the smaller trees.2. The layer of vegetation in a forest just below the uppermost layer.3. The region in the forest which receives scanty light and is damp,warm and dark.4. The...
amarjot2
Asked:
December 2022
continuous use of groundwater causes................................of water table.
amarjot2
Asked:
December 2022
Non -renewal resources a.can never be replaced once they get used up. b.can be replaced but the time of replacement varies from few hundred to millions of years. c.can be replaced in 10-20years.d.none of these.
amarjot2
Asked:
December 2022
Circle the odd ones.give reason for your choice : 1.air water sunlight forest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.snow irrigation ice watervapour . ....
amarjot2
Asked:
December 2022
Give reason for the following :Water should be used judiciously, though 71% of the earth's surface is covered with water
amarjot2
Asked:
December 2022
At the reverse (back) side of the spoon (a)when the object is close to the surface. .............................. (b) when the object is far from the surface....................
amarjot2
Asked:
December 2022
List two more devices / appliances / electric gadgets in our homes which are based on the same principle on which electric bulb works. (a)....................(b)..........................
amarjot2
Asked:
December 2022
Fill in the blanks:1.......................mirrors are used as shaving mirrors and reflectors in torches. 2......................mirrors are used as rear-view or side-view mirrors.3.When the image is erect ,same size as that of the object and does not change its size and nature on moving the mirror closer or away from the face,the...
amarjot2
Asked:
December 2022
Non -renewal resources a.can never be replaced once they get used up. b.can be replaced but the time of replacement varies from few hundred to millions of years. c.can be replaced in 10-20years.d.none of these.
A step well in which the rainwater is collected and stored.
amarjot2
Asked:
December 2022
Name the following :1.Two chemicals used to disinfect water:2.Two things that can be made from the sludge extracted during sewage treatment :3.Two diseases caused by drinking contaminated water :
amarjot2
Asked:
December 2022
How much of the earth's surface is covered with water? a.about two-thirdsb.about three-fourths c.about one-fourths d.about one-thirds
amarjot2
Asked:
December 2022
Name the following :1.The process of collecting water from roofs and storing it for the future use.
amarjot2
Asked:
December 2022
Give reason for the following :1.When we dig a deep hole in the ground a level comes where all the spaces between the soil particles and gap between the rocks are filled with water.
The water on the earth is maintained by. . . . . . . . . . . . . . . . . . . a.water cycle b.carbon cycle c.hydrogen cycle d.oxygen cycle
amarjot2
Asked:
December 2022
Give reason for the following :1. There is nothing that goes waste in forests.
amarjot2
Asked:
December 2022
Name the following : 1.The continuous circulation of water in nature .....................2.The upper limit of groundwater. ..............3.The huge reservoir of water inside the earth. ..................4.The exhaustible resources that can be replenished within reasonable time....................5.The resources that are available in a large quantity. ............................6.The reservoir of water collected above impervious rocks...
amarjot2
Asked:
December 2022
Identify the nature and size of image in following cases and complete the table :3.Image formed by a convex lens for different positions of the object
amarjot2
Asked:
December 2022
At the inner curved surface of the spoon (a)when the object is close to the surface. (b)when the object is far from the surface.