Page 89 - Science Course 1 (Book 2)
P. 89
Mo9-L1a: What are Earth’s systems?
The outermost Earth system is an invisible layer of The next system is the solid part of Earth, which
gases that surrounds the planet. contains a thin layer of soil covering a rocky center.
Below the layer of gases are the systems that The Earth system that contains all living things is the
contain Earth’s water. biosphere.
Key Concept SUMMARY
What are the Earth’s Systems?
What are the Earth’s Systems?
Earth is made of four interacting systems: the
What are the Earth’s Systems? atmosphere, the hydrosphere, the geosphere,
and the biosphere.
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