Continents, islands, and the sea floor are all part of the

Nitrogen and oxygen make up nearly 99% of the

Water covers nearly three quarters of the earth's surface and makes up the

Scientist release this into the air to investigate how the atmosphere interacts with the other parts of the earth system.

A terrarium is a simple closed

All life on earth is referred to as the

Diving suits and this are both examples of technology used to study the hydrosphere

Oceans, lakes, glaciers, rivers, streams and underground water are included in the

Scientist may use treetop platforms to study forest birds. These scientist are studying the

Earth has what kind of shape?

Strong winds slowly wear away the sides of a canyon. This is an example of how the atmosphere may affect

What is a system?

Earth is considered a closed system because

Scientist use satellite photos to track changes in plant and animal life. This is an example of how scientist study the

Warm ocean water may provide energy that creates large tropical storms, such as hurricanes. This is an example of how the hydrosphere may affect the

Earth's atmosphere, hydrosphere, biosphere, and geosphere are considered open systems because

One way scientist study the hydrosphere is by using

The strong winds of a tornado uproot many trees. This is an example of

Earth's inner core and outer core are both

How do earth's crust and mantle differ?

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