Question

Which of the following will reach the earth in greater amounts if the number of chlorofluorocarbons released into the air increases?
A. infrared rays
B. X-rays
C. gamma rays
D. ultraviolet rays

Answer 1

Answer:

Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. CFCs and HCFCs also warm the lower atmosphere of the earth, changing global climate. Hydrofluorocarbons (HFCs) also act to warm the planet. The Minnesota Pollution Control Agency (MPCA) is working with industry, residents and government to reduce the damage done to the ozone layer and global climate by CFCs, HCFCs, HFCs and related chemicals.

Explanation:

HÔPË ÏTẞ HÉLPFŪLL

Answer 2

D. Ultraviolet rays will reach the earth in greater amount.

Explanation:

• Earth is covered by a thin layer of ozone molecules (O₃).
• This layer protects the earth from the UV rays produced by sun.
• UV rays have harmful effect on all the living organisms in the earth. So, the UV-B rays and UV-C rays are absorbed by the ozone by a cyclic reaction.
• But, chlorofluorocarbons from the atmosphere disturb that cyclic reaction.
• Chlorofluorocarbons are one of the harmful gases produced by refrigeration system and aerosol sprays.
• This causes reduction in the ozone layers.
• So, the UV rays can reach the earth directly in large amount.