Layers of the Atmosphere

Front

Two gases that make up 99% of Earth's atmosphere

Back

nitrogen & oxygen

Answer explanation

The Earth's atmosphere is primarily composed of nitrogen (about 78%) and oxygen (about 21%). Together, they make up approximately 99% of the atmosphere, making 'nitrogen & oxygen' the correct answer.

Front

Layer of Earth's atmosphere where most of the water vapor and carbon dioxide is found

Back

troposphere

Answer explanation

The troposphere is the lowest layer of Earth's atmosphere, where most weather occurs and contains the majority of the planet's water vapor and carbon dioxide, making it the correct answer.

Front

Layer of Earth's atmosphere where weather occurs

Back

troposphere

Answer explanation

The troposphere is the lowest layer of Earth's atmosphere, where all weather phenomena occur, including clouds, rain, and storms. Other layers, like the stratosphere and mesosphere, do not have significant weather activity.

Front

Uppermost layer of Earth's atmosphere

Back

thermosphere

Answer explanation

The thermosphere is the uppermost layer of Earth's atmosphere, located above the mesosphere. It extends from about 85 km to 600 km above the Earth's surface, making it the correct answer.

Front

This gas makes up 21% of the atmosphere

Back

oxygen

Answer explanation

Oxygen is the gas that makes up 21% of the Earth's atmosphere, essential for respiration in most living organisms. Nitrogen is more abundant at 78%, while ozone and water vapor are present in much smaller amounts.

Front

What is the hottest layer in 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. This makes it significantly hotter than the other layers.

Front

What layer is the Ozone in?

Back

Stratosphere

Answer explanation

The Ozone is primarily found in the Stratosphere, which is the second layer of the Earth's atmosphere. The Ozone Layer is a part of the Stratosphere, where ozone concentration is highest, protecting us from harmful UV radiation.

Front

The _____ protects us from the harmful UV rays of the sun.

Back

Ozone Layer

Answer explanation

The Ozone Layer is a region in the Earth's stratosphere that absorbs most of the sun's harmful ultraviolet (UV) radiation, protecting living organisms from its damaging effects.

Front

The force of a column of air pressing down is called what?

Back

Air Pressure

Answer explanation

The force of a column of air pressing down is known as air pressure. It is the weight of the air above a given point, making 'Air Pressure' the correct choice among the options provided.

Front

Considered to be a part of the thermosphere.

Back

ionosphere

Answer explanation

The ionosphere is a region within the thermosphere, characterized by ionized particles that reflect radio waves. The thermosphere itself is a broader layer of the atmosphere, while the ionosphere specifically refers to its ionized part.