Which component of air remains the same in both exhaled and inhaled air?
Oxygen
Carbon dioxide
Nitrogen
Water content
Atmosphere has ______________________ % of nitrogen.
78%
0.03%
99%
50%
Smoking is injurious to health because it contains
Charcoal
Nicotine
Carcinogens
Carotene
Which energy is needed for bodily activities?
Light energy
Heat energy
Both light and heat energy
Electric energy
Global warming is the Increased level of
carbondioxide
Hydrogen
Helium
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.
Global warming is caused by
Argon
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
Which of the following does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
Which of the following is a biodegradable waste?
Radioactive wastes
Aluminium cans
DDT
Cattle dung