questions and answers on environment of class 10th lesson Environment
Answers
questions and answers on environment of class 10th lesson Environment
7. Why are green plants called ‘producers’? [All India]
Answer. Green plants are called ‘producers’ because they can produce food by photosynthesis in the presence of sunlight.
8. Which disease is caused in human beings due to depletion of ozone layer in the atmosphere? [Foreign]
Answer. Skin cancer is caused in human beings due to the depletion of ozone layer in the atmosphere.
SHORT ANSWER TYPE QUESTIONS [II] [2 Marks] – Year 2009
9. How is ozone formed in the upper atmosphere? Why is the damage of ozone layer a cause of concern to us? State a cause of this damage. [Delhi(C)]
Answer. Ozone is formed in upper atmosphere by the reaction of ultraviolet (UV) radiations on oxygen (02) molecule.
The damage to ozone layer is a cause of concern to us as due to its damage, more ultraviolet rays reach the earth’s surface causing various health hazards.
our-environment-chapter-wise-important-questions-class-10-science-2
A cause of this damage is the presence of large amount of chlorofluorocarbons in the atmosphere.