4.4 Earth's Atmosphere

• Order the layers of the Earth's atmosphere from closest to Earth's surface to farthest:

  1️⃣ Troposphere

  2️⃣ Stratosphere

  3️⃣ Mesosphere

  4️⃣ Thermosphere

  5️⃣ Exosphere
• The Mesosphere is located between 50 and 85 km above sea level.
• What is the altitude range of the Stratosphere?

  12-50 km
• Meteors burn up in the Mesosphere.
• Which atmospheric layer absorbs UV radiation?

  Stratosphere
• Auroras occur in the Thermosphere.
• What is the Earth's atmosphere held in place by?

  Gravity
• The ozone layer in the stratosphere absorbs harmful ultraviolet radiation.
• The Earth's atmosphere regulates climate by absorbing and distributing heat.
• Which two gases in the Earth's atmosphere are essential for life?

  Oxygen and nitrogen
• Arrange the layers of the atmosphere in order from lowest to highest altitude.

  1️⃣ Troposphere

  2️⃣ Stratosphere

  3️⃣ Mesosphere

  4️⃣ Thermosphere

  5️⃣ Exosphere
• What percentage of the troposphere is nitrogen?

  78%
• In which layer of the atmosphere does temperature increase with altitude?

  Stratosphere
• Meteors burn up in the mesosphere layer of the atmosphere.
• Auroras occur in the thermosphere.
• Which two gases primarily compose the exosphere?

  Hydrogen and helium
• Match the atmospheric layer with its key feature:

  Troposphere ↔️ Weather phenomena

  Stratosphere ↔️ Ozone layer

  Mesosphere ↔️ Meteors burn up

  Thermosphere ↔️ Auroras occur

  Exosphere ↔️ Fades into space
• What percentage of the atmosphere is oxygen by volume?

  21%
• Which trace gas in the atmosphere is crucial for plant growth?

  Nitrogen
• Trace gases in the atmosphere play a crucial role in climate regulation.
• The Troposphere extends from 0 to 12 km.
• What is the key feature of the Stratosphere?

  Ozone layer
• Meteors burn up in the Mesosphere.
• Match the atmospheric layer with its key feature:

  Thermosphere ↔️ Auroras occur

  Exosphere ↔️ Fades into space
• The Exosphere gradually fades into space.
• Which atmospheric layer contains most weather phenomena?

  Troposphere
• How many primary layers does the Earth's atmosphere have?

  Five
• The troposphere extends from 0 to 12 km
• The stratosphere contains the ozone layer, which absorbs UV radiation.
• Match the atmospheric layer with its key feature:

  Troposphere ↔️ Contains most weather phenomena

  Stratosphere ↔️ Absorbs UV radiation

  Mesosphere ↔️ Meteors burn up here

  Thermosphere ↔️ Auroras occur

  Exosphere ↔️ Gradually fades into space
• Auroras occur in the thermosphere
• Arrange the layers of the Earth's atmosphere in order from closest to farthest from the Earth's surface:

  1️⃣ Troposphere

  2️⃣ Stratosphere

  3️⃣ Mesosphere

  4️⃣ Thermosphere

  5️⃣ Exosphere
• What are the three distinguishing characteristics of the Earth's atmospheric layers?

  Composition, temperature, features
• Nitrogen makes up 78% of the Earth's atmosphere.
• What trace gases are found in the Earth's atmosphere?

  CO2, O3, H2O
• Greenhouse gases such as carbon dioxide trap heat and maintain a suitable temperature through the greenhouse effect
• The atmosphere provides oxygen for respiration.
• Match the atmospheric function with its role:

  Protection from Solar Radiation ↔️ Absorbs harmful UV radiation

  Climate Regulation ↔️ Absorbs and distributes heat

  Provision of Life-Sustaining Gases ↔️ Supports respiration and plant growth
• Arrange the following atmospheric phenomena in order from most common to least common:

  1️⃣ Rain

  2️⃣ Clouds

  3️⃣ Fog

  4️⃣ Lightning

  5️⃣ Hail
• What drives wind in the Earth's atmosphere?

  Pressure gradients