Atmosphere 26

The condition of Earth's atmosphere at a particular time and place is called _________________

• weather
• atmosphere
• climate
• altitude

_______________ is the covering of gases that surrounds Earth.

• biosphere
• atmosphere
• hydropshere
• lithosphere

What is the purpose of the Atmosphere? Check all that are correct.

• Traps energy from the sun. It is like a warm blanket that is a great insulator. (AIR)
• Contains oxygen and other gases that living things need.
• Keeps Earth’s surface warm and Earth’s water in liquid form, another requirement of living things.
• Protects Earth from dangerous radiation from the sun and from meteoroids, which are chunks of rock from outer space.
• It prevents all light from reaching Earth's surface.

What percentage of air is made of nitrogen and oxygen together? ____

• 99 %
• 21 %
• 78 %
• 59 %
• 70 %

Carbon dioxide alone makes up almost 1 percent of dry air. _____

• true
• false

Select each sentence that is true about the troposphere.

• It is the lowest layer of Earth's atmosphere.
• It has less variable conditions than other layers.
• It is where Earth's weather occurs.
• It is the shallowest layer of the atmosphere.

The four main layers of the atmosphere are classified according to changes in _______________.

• mass
• altitude
• temperature

The troposphere contains almost half the mass of the atmosphere.

• true
• false

As altitude increases in the troposphere, temperature also increases.

• true
• false

How far does the stratosphere extend above Earth's surface?

• 20 km
• 5 km
• 11 km
• 48 km