15.1 Earth's Atmosphere

Front

Why is CARBON DIOXIDE important to our atmosphere?

Back

It traps heat on Earth.

Front

What kind of weather does high pressure usually bring?

Back

Clear and dry.

Front

OXYGEN is created by photosynthetic microorganisms called _______.

Back

Cyanobacteria.

Front

Why is NITROGEN important in our atmosphere?

Back

It is used in the production of foods and farming.

Front

How do clouds form?

Back

Warm water vapor hits cold air, changing the gas into a liquid, and forming a cloud.

Front

What is the most abundant gas in the Earth's atmosphere?

Back

Nitrogen.

Front

What role does oxygen play in human respiration?

Back

Oxygen is essential for the process of cellular respiration in humans.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the process by which certain gases trap heat in the atmosphere, keeping the Earth warm.

Front

What is the primary source of oxygen in the atmosphere?

Back

Photosynthesis by plants and microorganisms.

Front

What happens to air pressure as altitude increases?

Back

Air pressure decreases as altitude increases.