Composition of Air

Which of the gases below make up the most percentage of air in the atmosphere?

• nitrogen

• oxygen

• carbon dioxide

• inert gases

Which of the gases below make up the smallest percentage of air in the atmosphere?

• nitrogen

• oxygen

• carbon dioxide

• inert gases

What is the relationship between the water vapour content in the air and the formation of cloud and rain?

• When there is more water vapour in the air, more cloud is formed and more rain will be observed at that area

• When there is more water vapour in the air, less cloud is formed and less rain will be observed.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

Why did the flame become extinguished at the end of the experiment?

• Because it has used up all the carbon dioxide gas in the gas jar

• Because water has entered the gas jar

• Because it has used up all oxygen in the gas jar

• Because there is no air inside the gas jar

Tags

NGSS.MS-PS1-2

At the end of the experiment, the water level rose to one fifth of the gas jar. What does this show us?

• air consists of 25 percent oxygen

• one fifth of the air contains oxygen

• the air pressure inside of the gas jar is high

• oxygen dissolve in water resulting in the rise in water level

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NGSS.MS-PS1-2

Why is air a mixture?

• air is made up of various gases molecules and compound combined chemically

• air is made up of various gases molecules and compound combined together physically

• the components of air can be separated by a chemical method (electrolysis)

• the components in air can be separated by a physical method (fractional distillation)

Which of the following correctly describe oxygen cycle?

• photosynthesis and decomposition both function in releasing oxygen into the air

• a continuous cycle that takes oxygen from the air and returns it to the air

• a continuous cycle that maintains the content of carbon dioxide in the air by continuously taking carbon dioxide from the air and returning it to the air

• plants only release oxygen into the air and not carbon dioxide

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

All the following are true about carbon cycle except:

• carbon cycle began when green plants absorb carbon dioxide through photosynthesis

• carbon is transferred to animals only when they breath in air that contains 0.03% carbon dioxide

• decomposition caused by bacteria and fungi in the soil releases carbon dioxide

• Processes such as decomposition, combustion, and respiration are balanced by photosynthesis

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NGSS.MS-ESS2-1

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Carbon and oxygen cycle maintain the gas content in the air. Which of the following could result in an interference in the cycles?

• excessive and uncontrolled logging

• uncontrolled use of pesticides in agriculture

• unregulated growth of factories releasing harmful gases into the air

• a decrease in human and animal population due to pandemic

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NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

What is the consequences of the interference in oxygen and carbon cycle?

Tags

NGSS.HS-ESS2-4

NGSS.HS-ESS2-6

NGSS.HS-LS2-5