Layers of the Atmosphere

Which of the following statements about the troposphere is incorrect?

• It contains the air we breathe.

• It is where the weather occurs.

• It is the highest layer of the atmosphere.

• Its temperature decreases with altitude.

Which atmospheric layer reaches the highest temperatures due to the absorption of solar radiation?

• mesosphere

• stratosphere

• thermosphere

• troposphere

Which of the following is the primary function of the stratosphere’s ozone layer?

• It trap greenhouse gases

• It reflect heat into outer space

• It generate oxygen for the Earth

• It absorb harmful ultraviolet (UV) radiation

Meteors burn up in the mesosphere when they enter Earth's atmosphere. This layer of the atmosphere is considered the hottest of all the layers. Identify whether the given statements are true or otherwise.

• Both statements are true.

• Both statements are false.

• The first statement is true.

• The second statement is true.

What happens to the air pressure as altitude increases?

• The air pressure increases.

• The air pressure decreases.

• The air pressure stays the same.

• The air pressure fluctuates randomly.

An astronaut is getting ready for a space mission. Before reaching space, he must pass through all the layers of the atmosphere. Which layer will he go through last?

• exosphere

• ionosphere

• mesosphere

• stratosphere

What is the innermost layer of the atmosphere?

• mesosphere

• stratosphere

• thermosphere

• troposphere

A scientist is researching how heat spreads in the atmosphere. He observes that the thermosphere has extremely high temperatures, yet astronauts do not feel hot. What explains this?

• The ozone layer absorbs all the heat.

• The air is too thin to transfer heat effectively.

• The mesosphere cools down the thermosphere.

• Solar radiation does not reach the thermosphere.

Which layer of the atmosphere is responsible for reflecting radio waves?

• exosphere

• ionosphere

• mesosphere

• troposphere

During a meteor shower, people on Earth see bright streaks of light as meteors burn up. In which layer of the atmosphere does this happen?

• exosphere

• ionosphere

• mesosphere

• stratosphere