FREE ODP Environmental Impact  Questions and Answers

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The following form(s) of oxygen is (are) involved in the ozone-oxygen cycle.

Correct! Wrong!

Explanation:
The ozone-oxygen cycle involves the participation of triatomic oxygen (O3). This cycle is a series of chemical reactions that occur in the Earth's atmosphere and is responsible for the formation and depletion of ozone. In this cycle, ultraviolet radiation breaks down ozone into diatomic oxygen (O2) and atomic oxygen (O), which then reacts with other molecules to form ozone again. Therefore, triatomic oxygen (O3) plays a crucial role in maintaining the balance of ozone in the atmosphere.

Ozone in the Earth's stratosphere is created by UV light striking ______ molecule.

Correct! Wrong!

Explanation:
The UV radiation from the sun interacts with oxygen molecules. The resulting oxygen atoms interact with oxygen molecules to form ozone. The ozone layer is formed as a result of the interaction between sunlight, oxygen molecules (02), and ozone molecules.

One chlorine or bromine radical liberated has the capability to act as a catalyst and break down ________ number of ozone molecules approximately:

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Explanation:
One chlorine or bromine radical liberated has the capability to act as a catalyst and break down a large number of ozone molecules. This is because the chlorine or bromine radical acts as a catalyst, meaning it can participate in multiple reactions without being consumed or destroyed in the process.

The ozone layer stops most of the harmful _____ from hitting Earth.

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Explanation:
The ozone layer stops most of the harmful UV rays from hitting Earth, protecting living organisms from ultraviolet radiation.

The ozone layer prevents _________ from passing through the Earth’s atmosphere.

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Explanation:
The ozone layer acts as a protective shield in the Earth's atmosphere, preventing harmful ultraviolet (UV) rays from passing through. UV rays can cause various health problems, including skin cancer and cataracts. By absorbing and filtering out most of the UV radiation, the ozone layer plays a crucial role in maintaining the planet's overall ecological balance and safeguarding living organisms. In contrast, infrared rays and X-rays are not primarily blocked by the ozone layer.

The ozone layer is made of _________.

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Explanation:
The ozone layer is made of gases, primarily ozone (O3), which is a form of oxygen.

Which of the following is more reactive in the lower atmosphere (Troposphere):

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Explanation:
Due to the presence of chlorine atoms, HCFCs are more reactive in the lower atmosphere compared to HFCs, which do not contain chlorine. On the other hand, CFCs have longer atmospheric lifetimes and are relatively more stable in the lower atmosphere.

The Ozone hole is a much larger springtime decrease in ___ ozone around Earth’s polar regions.

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Explanation:
The ozone hole refers to a significant reduction in the ozone layer specifically in the stratosphere, which is the correct answer. This depletion is more pronounced during springtime and occurs mainly around Earth's polar regions. The exosphere and thermosphere are not directly related to the ozone hole phenomenon.

Which of the following compounds have a less severe effect on the ozone layer:

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Explanation:
Hydrofluorocarbons (HFCs) are compounds that have a less severe effect on the ozone layer compared to substances like chlorofluorocarbons (CFCs) and halons. HFCs are synthetic compounds that contain hydrogen, fluorine, and carbon atoms. Unlike CFCs and halons, HFCs do not contain chlorine or bromine, which are the main ozone-depleting elements. As a result, HFCs do not directly contribute to ozone depletion in the stratosphere. However, they are potent greenhouse gases with high global warming potential (GWP).

The ozone layer can be found _____.

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Explanation:
The ozone layer can be found many miles up in the sky, specifically in the stratosphere, which is the second major layer of Earth's atmosphere.

The ozone layer is present in which of the following layers of the earth:

Correct! Wrong!

Explanation:
The ozone layer is present in the stratosphere. It typically extends from 6 to 30 miles above the Earth's surface.

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