Glossary of Vocabulary Words Chapter 2 Earth Science
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- Crust
- The thin solid outermost zone of the earth
1% of the earth's mass
- Mantle
- The layer under the crust
2,900km thick
2/3 of the earth's mass
- Core
- Center Sphere of the earth
3,500 km
Made up of iron and nickel
- What are the compositional zones of the earth
- crust, mantle, core
- What are the structural zones of the earth?
- Lithosphere, asthenosphere and mesophere
- Lithosphere
- the solid outer layer made of the crust and the rigid upper part of the mantle
15-300km thick
- asthenosphere
- the solid plastic layer of the Mantle beneath the lithospher made of mantle rock that flows 200-250km thick
- mesophere
- 2,900 km layer of solid mantle rock
The "middle sphere" between the mantle and outer core
- System
- An organized group of related objects or components
that interact
- Earth system
- interaction between matter and energy
- What are the four earth's
spheres? - Atmosphere, hydrosphere, geosphere, biosphere
- What is atmosphere
- a mixture of gases that surround a planet or moon
78% nitrogen 21% oxygen
1% other gases
- What is a hydrophere
- The portion of the earth that is water 71%
97% salt water 3% fresh
- What is geosphere?
- Mostly solid part of the earth
All the rock and soil on the surface of the continents and on the ocean floor.
- What is the Biosphere?
- The part of the earth where life exists, includes all of the living organisms on earth.
- Ecosystem
- A Community of organisms and the environment that the inhabit
- Carrying Capacity
- the largest population that an environment can support
- Food Web
- The relationship between many food chains The diagram that shows the feeding relationships among organisms in the ecosystem.
- Food Chain
- The sequence in which organisms consume other organisms