What would happen, if all the oxygen present in the environment is
converted to ozone?
(a) We will be protected more
(b) It will become poisonous and kill living forms
(c) Ozone is not stable, hence it will be toxic
(d) It will help harmful sun radiations to reach earth and damage many
life forms.
If there were no atmosphere around the earth, the temperature of the earth will
(a) increase
(b) go on decreasing
(c) increase during day and decrease during night
(d) be unaffected
The atmosphere of the earth is heated by radiations which are mainly
(a) radiated by the sun
(b) re-radiated by land
(c) re-radiated by water
(d) re-radiated by land and water
Becoming exposed to or infected with an infectious microbe does not necessarily mean developing noticeable disease. Explain.
Why do some children fall ill more frequently than others living in the same
locality?
+91 94284 01196
© Copyright 2025. Doubtora. All Rights Reserved
