Atmosphere

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What is the primary factor that holds the atmosphere near the surface of Earth?

Earth's magnetic field
Wind patterns
The atmosphere's own weight
Earth's gravitational attraction (correct)

What is the correct definition of the atmosphere?

A region of intense heat and pressure
A vacuum that exists in outer space
A protective layer of gases that shelters all life on Earth (correct)
A layer of gases that surrounds the moon

How many distinct layers does the atmosphere have?

Five (correct)
Seven
Three
Four

What is the main purpose of a barometer?

To measure the air pressure (A) Signup and view all the answers

What are the three main constituents of the atmosphere?

Argon, oxygen, and nitrogen (B) Signup and view all the answers

What is the characteristic of the atmosphere's boundary with outer space?

A gradual blending into outer space (C) Signup and view all the answers

What percentage of air in the atmosphere is found in the troposphere?

75% (B) Signup and view all the answers

Which layer of the atmosphere gets warmer as you go higher?

Stratosphere (B) Signup and view all the answers

What is the primary reason for the temperature decrease in the troposphere as you go higher?

The air expands and cools (A) Signup and view all the answers

In which layer of the atmosphere do satellites orbit the Earth?

Thermosphere (B) Signup and view all the answers

What is the ionosphere?

A series of regions in the mesosphere and thermosphere (C) Signup and view all the answers

What is the coldest part of the atmosphere?

Mesosphere (A) Signup and view all the answers

What is the primary role of the atmospheric layer that is visible to the naked eye?

To reflect the blue color of the sky (A) Signup and view all the answers

What is the underlying principle behind the atmosphere's ability to shelter all life on Earth?

Its ability to block out harmful radiation (A) Signup and view all the answers

What is the relationship between the atmosphere's density and altitude?

The atmosphere's density decreases as altitude increases (C) Signup and view all the answers

What is the primary characteristic of the atmosphere's layers?

They are determined by changes in temperature (A) Signup and view all the answers

What is the primary factor that determines the atmosphere's ability to regulate Earth's climate?

The temperature of the atmosphere's layers (C) Signup and view all the answers

What is the underlying assumption behind the definition of the atmosphere as a protective layer of gases?

That it is a dynamic entity (A) Signup and view all the answers

In the troposphere, what happens to air as it rises?

It expands and cools (B) Signup and view all the answers

What is the primary reason for the temperature increase in the thermosphere?

Absorption of high-energy ultraviolet and X-ray radiation from the sun (D) Signup and view all the answers

What is unique about the stratosphere in terms of temperature?

It gets warmer as you go higher (C) Signup and view all the answers

What is the characteristic of the air in the exosphere?

It is thin and constantly leaking into outer space (D) Signup and view all the answers

What is the role of ozone molecules in the stratosphere?

They absorb high-energy ultraviolet light from the sun and convert it into heat (A) Signup and view all the answers

In which layers of the atmosphere do the aurora occur?

Mesosphere and thermosphere (D) Signup and view all the answers