Layers of Earth Atmosphere

Front

The coldest layer.

Back

mesosphere

Answer explanation

The mesosphere is the coldest layer of Earth's atmosphere, where temperatures can drop to about -90°C. In contrast, the troposphere is warmer, and the thermosphere and exosphere are much hotter due to solar radiation.

Front

The hottest layer.

Back

thermosphere

Answer explanation

The thermosphere is the hottest layer of Earth's atmosphere, with temperatures reaching up to 2,500°C (4,500°F) or more due to the absorption of high-energy solar radiation. This makes it the correct answer.

Front

The most common gas in the atmosphere.

Back

Nitrogen

Answer explanation

Nitrogen is the most abundant gas in the atmosphere, making up about 78% of it. In contrast, oxygen comprises about 21%, while carbon dioxide and trace gases are present in much smaller amounts.

Front

What enables atmosphere of earth to stay in place?

Back

gravity

Answer explanation

Gravity is the force that pulls the atmosphere towards the Earth, keeping it in place. Without gravity, the gases that make up the atmosphere would drift into space.

Front

What happens to the density (thickness)/ air pressure of the air as you increase in altitude?

Back

density decreases

Answer explanation

As altitude increases, air density decreases due to the lower weight of the air above. This results in fewer air molecules in a given volume, leading to lower air pressure and density.

Front

The layers of the atmosphere are separated according to this change.

Back

Temperature

Answer explanation

The layers of the atmosphere are primarily separated by changes in temperature. As altitude increases, temperature typically decreases in the troposphere, then increases in the stratosphere, making temperature the correct choice.

Front

78% of the Earth's atmosphere is ___________ and 21% of the Earth's atmosphere is _____________.

Back

Nitrogen, Oxygen

Answer explanation

78% of the Earth's atmosphere is Nitrogen, making it the most abundant gas, while 21% is Oxygen. This confirms that the correct answer is Nitrogen, Oxygen.

Front

What is the order of the layers of the atmosphere, starting with the layer closest to Earth's surface? Options: Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere; Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere; Troposphere, Stratosphere, Mesosphere, Exosphere, Thermosphere; Troposphere, Stratosphere, Thermosphere, Exosphere, Mesosphere

Back

Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

Answer explanation

The correct order of the layers of the atmosphere, starting from the surface, is Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. This matches the second answer choice.

Front

Where would you find the ozone layer?

Back

stratosphere

Answer explanation

The ozone layer is found in the stratosphere, which is the second layer of Earth's atmosphere. It plays a crucial role in absorbing harmful ultraviolet radiation from the sun.

Front

In which layer of the atmosphere does weather occur?

Back

Troposphere

Answer explanation

Weather occurs in the Troposphere, the lowest layer of the atmosphere, where clouds, rain, and storms form due to the presence of water vapor and temperature changes.