Layers of Earth's Atmosphere

What does weather refer to?

• The conditions of the atmosphere at a given time and place

• The average climate over a long period

• The study of celestial bodies

• The movement of tectonic plates

Which factors does weather depend on?

• Air temperature, air pressure, humidity, precipitation, wind speed and direction

• Ocean currents, tectonic activity, and volcanic eruptions

• Soil composition, plant growth, and animal migration

• Lunar phases, solar flares, and asteroid impacts

Why does weather occur?

• Due to the Sun’s unequal heating of the atmosphere

• Because of the Earth's magnetic field

• Due to the gravitational pull of the moon

• Because of the rotation of the Earth

What happens to warm air in the atmosphere?

• It rises because it is less dense

• It sinks because it is more dense

• It remains stationary

• It evaporates into space

How far does Earth's atmosphere extend from the surface?

• About 100 miles

• About 200 miles

• About 600 miles

• About 1,000 miles

How does Earth's atmosphere help maintain the planet's temperature?

• By reflecting sunlight

• Through the greenhouse effect

• By absorbing water vapor

• By blocking all solar radiation

Which layer of the atmosphere is where weather occurs?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

What is the primary characteristic of the stratosphere?

• Coldest layer

• Contains the ozone layer

• Merges with space

• Temperature decreases with height

In which layer does the temperature increase with height?

• Troposphere

• Mesosphere

• Thermosphere

• Exosphere

What is the main feature of the exosphere?

• Coldest layer

• Contains the ozone layer

• Merges with space

• Where weather occurs