Atmosphere

Front

What is the atmosphere made up of?

Back

Nitrogen, oxygen, carbon dioxide, water vapor, and other gases

Answer explanation

The atmosphere is composed of a mixture of gases, primarily nitrogen and oxygen, along with carbon dioxide, water vapor, and trace amounts of other gases. Thus, the correct answer is 'Nitrogen, oxygen, carbon dioxide, water vapor, and other gases'.

Front

Which layer(s) of the atmosphere has air that's breathable?

Back

Troposphere

Answer explanation

The troposphere is the lowest layer of the atmosphere, where weather occurs and air is breathable. The stratosphere, mesosphere, and exosphere have thinner air and lack sufficient oxygen for breathing.

Front

The atmosphere plays a role in our relationship to the sun by:

Back

protecting us from harmful solar radiation

Answer explanation

The atmosphere protects us from harmful solar radiation by filtering out a significant portion of the sun's ultraviolet rays, which can cause damage to living organisms and the environment.

Front

Which layer of the atmosphere is directly above the troposphere?

Back

Stratosphere

Answer explanation

The layer directly above the troposphere is the stratosphere. It contains the ozone layer, which absorbs and scatters ultraviolet solar radiation, making it crucial for protecting life on Earth.

Front

Aurora borealis takes place in the _________.

Back

Thermosphere

Answer explanation

The aurora borealis, or northern lights, occurs in the thermosphere, where charged particles from the sun interact with the Earth's magnetic field, creating stunning light displays.

Front

As altitude increases, air pressure ________, which also decreases density. of air molecules

Back

decreases

Answer explanation

As altitude increases, the amount of air above decreases, leading to lower air pressure. This decrease in pressure also results in a reduction in air density, making 'decreases' the correct choice.

Front

What is heat?

Back

A form of energy transferred between objects of different temperatures (from hot to cold)

Answer explanation

Heat is defined as a form of energy that is transferred between objects with different temperatures. This makes option B the correct choice, as it accurately describes the nature of heat.

Front

Why is heat transfer important?

Back

It affects temperatures, wind, and precipitation.

Answer explanation

Heat transfer is crucial as it influences temperatures, wind patterns, and precipitation. Therefore, the correct choice is that it affects temperatures, wind, and precipitation, not just one of them.

Front

You cannot see the radiation from the sun, but you can feel it as _______.

Back

heat

Answer explanation

You cannot see the radiation from the sun, but you can feel it as heat. The sun emits infrared radiation, which we perceive as warmth, making 'heat' the correct answer.

Front

Why is it hard to breathe at high elevations?

Back

The air density decreases so we get less oxygen.

Answer explanation

At high elevations, the air density decreases, which means there are fewer air molecules, including oxygen, available for breathing. This is why we get less oxygen, making it hard to breathe.