Characteristics to Support Life on Earth

Front

What is the atmosphere?

Back

The entire mass of air that surrounds Earth, made up of 78% nitrogen, 21% oxygen, and trace amounts of other gases.

Front

Which element is NOT a requirement for life to exist on a planet?

Back

Just the right period of rotation.

Front

Why is the ozone layer important to life on Earth?

Back

It shields Earth from ultraviolet radiation.

Front

What two elements make up most of Earth's atmosphere?

Back

Nitrogen and Oxygen.

Front

What is the most important factor that determines Earth’s temperature?

Back

Proximity to the Sun.

Front

What is the primary gas in Earth's atmosphere?

Back

Nitrogen.

Front

What role does oxygen play in supporting life on Earth?

Back

Oxygen is essential for respiration in most living organisms.

Front

How does the distance from the Sun affect life on Earth?

Back

It determines the planet's temperature and climate, which are crucial for sustaining life.

Front

What is the significance of water for life on Earth?

Back

Water is essential for all known forms of life; it is a solvent, a temperature regulator, and a medium for biochemical reactions.

Front

What is the greenhouse effect?

Back

The process by which certain gases in Earth's atmosphere trap heat, keeping the planet warm enough to support life.