1) Air pollutants can do all of the following EXPECT:
A) damage the respiratory system
B) enter the bloodstream and harm other parts of the body***
C) cause discoloration to your hair
D) reduce your protection from the sun's radiation
2) Biodegradable waste threatens the health of humans.
A) True
B) False***
3) Some air pollutants are harmful to the ozone layer.
A) True***
B) False
#2 is correct. #1 is not.
To get the answer to question 1), you need to have knowledge about the impacts of air pollutants. By learning about the effects of air pollutants on the human body, you can eliminate the options that are consistent with these effects. Let's go through the answer choices:
A) Damage the respiratory system: This is a known effect of air pollutants. Air pollutants can cause respiratory problems such as asthma and bronchitis.
B) Enter the bloodstream and harm other parts of the body: This is true. Air pollutants, particularly fine particulate matter, can enter the bloodstream through inhalation and cause harm to various organs and systems in the body.
C) Cause discoloration to your hair: This is not a typical effect of air pollutants. Air pollution primarily affects the respiratory system and other parts of the body, rather than causing discoloration of hair.
D) Reduce your protection from the sun's radiation: This is not a direct effect of air pollutants. Air pollutants can contribute to the formation of smog, which can indirectly affect the amount of UV radiation reaching the surface. However, reducing protection from the sun's radiation is not a direct effect of air pollutants themselves.
Therefore, the correct answer is B) Enter the bloodstream and harm other parts of the body.
To answer question 2), you need to understand the meaning of biodegradable waste and its impact on human health. Biodegradable waste refers to organic waste that can be broken down by natural processes. It does not pose a threat to human health because it can be decomposed by microorganisms without harmful consequences. Therefore, the correct answer is B) False.
Question 3) is about the impact of air pollutants on the ozone layer. You need to know that certain air pollutants, such as chlorofluorocarbons (CFCs), can react with and destroy ozone molecules in the stratosphere. This leads to the thinning of the ozone layer, which is harmful as it allows more harmful UV radiation from the sun to reach the Earth's surface. Therefore, the correct answer is A) True.