Earth and Earth Subsystems

2. Zone of the ocean where high tide and low tide occur.
4. Earth is sometimes called the "_____ planet" because seas cover more than two-thirds of its surface.
6. A major terrestrial community of living organisms that have been formed in response to a shared physical climate.
8. Lies between lithosphere and mantle.
11. This serves as the ecosystem of all living and non-living organisms.
13. Main source of energy to drive external processes such as weather, ocean circulation, and erosional processes on Earth.
14. This layer is made of Iron and Nickel.
16. A thin layer of solid rock that makes up the outermost part of the Earth.
17. A set of interconnected components that are interacting to form a unified whole.
18. It is an example of a connection between atmosphere and hydrosphere.
19. This system is considered as the largest component of the Earth.

1. The water part of the Earth which circulates among oceans, continents, glaciers, and atmosphere.
3. A body of porous rock or sediment saturated with groundwater.
5. It is a complex system made up of many smaller systems through which matter and energy are continuously cycled.
7. One of the factors that makes our planet habitable.
8. It provides the geosphere with heat and energy needed for rock breakdown and erosion.
9. It acts as a shield from harmful ultraviolet rays from the sun.
10. This gas dominates the Earth's atmosphere.
12. The various Earth systems exhibit relationships between the complex populations of individual life. In nature, what is the unit called?
15. Greek word meaning rocky/stone.