Exercises: Fill in the blanks that correspond to the Earth's subsystem.
1. All the water in the ocean, the freshwater in the lakes and streams,
the snow and rain are part of the
2. All living organisms are part of the
3.
is the life-giving gaseous component of the Earth.
4. Mountains, caves, and all the rocks of the Earth make up the
5. The troposphere, stratosphere, mesosphere, and thermosphere are
the layers of the
AI. Explain in 3 sentences why the Earth is called as the planet of life. (5 poin