Which is the protective covering to the earth and its living beings?
Oxygen
Ozone
Nitrogen
Carbon dioxide
The smallest unit of living matter.
Cells
Tissues
Organs
Plants
Which energy is needed for bodily activities?
Light energy
Heat energy
Both light and heat energy
Electric energy
During photosynthesis, plants absorb___________ and watervapour.
Carbondioxide
Natural gas
Global warming is caused by
Argon
Helium
Which of the following is a biodegradable waste?
Radioactive wastes
Aluminium cans
DDT
Cattle dung
Which of the following statement is wrong about ozone layer?
A well marked ozone layer is present in the stratosphere
Ozone layer damage the human body and causes inflammatory diseases.
Ozone layer absorbs the harmful ultraviolet rays of the sun.
Ozone layer act as a protective shield.
The gas emitted when fossil fuels are burnt
Chloroflurocarbons.
Atmosphere has ______________________ % of nitrogen.
78%
0.03%
99%
50%
The water drops on the surface of glass in which ice cubes are placed is because of
Atmospheric Vapour
The glass itself
The ice cubes inside
None of above
