Atmosphere

Front

Layer of gases surrounding Earth: _________

Back

atmosphere

Answer explanation

The correct answer is 'atmosphere' because it refers to the layer of gases that envelops the Earth, essential for life. The other options do not describe this layer.

Front

Ozone layer absorbs UV radiation.

Back

Stratosphere

Answer explanation

The ozone layer, which absorbs harmful UV radiation, is located in the stratosphere. This layer is situated above the troposphere and below the mesosphere, making it the correct answer.

Front

More pressure is found sitting in a classroom.

Back

sitting in this classroom

Answer explanation

Pressure increases with depth in a fluid. In a classroom, the air pressure is higher than on a roof or mountain due to the weight of the air above. Thus, sitting in this classroom experiences more pressure.

Front

Layer with most water vapor:

Back

troposphere

Answer explanation

The troposphere is the lowest layer of the atmosphere and contains most of the Earth's water vapor, as it is where weather occurs and where clouds form. The other layers have significantly less water vapor.

Front

Layer jets fly in to avoid thunderstorms:

Back

stratosphere

Answer explanation

Jets fly in the stratosphere to avoid thunderstorms, as this layer is above the turbulent weather found in the troposphere where storms occur. The stratosphere provides a more stable flying environment.

Front

Temperature change in the troposphere with altitude:

Back

Decreases steadily

Answer explanation

As you ascend in the troposphere, the temperature decreases steadily due to the decreasing air pressure and density, which leads to lower temperatures at higher altitudes.

Front

Altitude increase = air pressure...

Back

Decreases

Answer explanation

As altitude increases, the amount of air above decreases, leading to lower air pressure. Therefore, air pressure decreases with increasing altitude.

Front

Importance of the ozone layer

Back

Shields Earth from UV rays.

Answer explanation

The ozone layer is vital because it shields the Earth from harmful ultraviolet (UV) rays from the sun, protecting living organisms from damage that can lead to skin cancer and other health issues.

Front

Layer where meteors burn up:

Back

Mesosphere

Answer explanation

Meteors burn up in the mesosphere, which is located between the stratosphere and the thermosphere. This layer is where the friction from the atmosphere causes meteors to heat up and disintegrate.

Front

Hottest layer of the atmosphere

Back

Thermosphere

Answer explanation

The thermosphere is the hottest layer of the atmosphere, with temperatures reaching up to 2,500°C (4,500°F) or more due to the absorption of high-energy solar radiation. In contrast, the troposphere, stratosphere, and mesosphere are cooler.