Unit 1 Test

Why is the bottom of the troposphere warmer than its top portion?

• Heat from the core of Earth is radiated upward into the troposphere.

• Sunlight is conducted down until it reaches the bottom portion of the troposphere.

• Sunlight warms the surface of Earth and the heat is radiated back into the troposphere.

• Heat transfers from the other layers of the atmosphere and is pushed into the bottom portion of the troposphere.

Which atmospheric layer is closest to Earth’s surface?

• Mesosphere

• Thermosphere

• Exosphere

• Troposphere

In which level of the atmosphere is ozone most concentrated?

• Troposphere

• Mesosphere

• Stratosphere

• Thermosphere

Which phrase best describes Earth’s atmosphere?

• a single layer of gases surrounding Earth

• multiple layers of gases surrounding Earth

• a bubble of air close to the surface of Earth

• clouds and particles in a single layer around Earth

Which graphic best represents the density of air molecules throughout the atmosphere?

• 
• 
• 
• 

In which of Earth’s atmospheric layers does weather occur?

• Exosphere

• Thermosphere

• Troposphere

• Stratosphere

The diagram above shows air circulation near a beach.

At which location would the coolest air most likely be found?

• 1

• 2

• 3

• 4

Which global wind will most influence the weather of North Carolina?

• 1

• 2

• 3

• 4

Which process is most responsible for moving heat through the atmosphere?

• Conduction

• Convection

• photosynthesis

• Ozone

Which choice best organizes the five layers of Earth’s atmosphere from lowest altitude to highest altitude?

• stratosphere, troposphere, thermosphere, mesosphere, exosphere

• thermosphere, stratosphere, mesosphere, troposphere, exosphere

• troposphere, stratosphere, mesosphere, thermosphere, exosphere

• exosphere, thermosphere, mesosphere, stratosphere, troposphere