Earth sci- chapter 1 Flashcards Preview

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Flashcards in Earth sci- chapter 1 Deck (17)
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0
Q

Hypothesis

A

Idea that explains a given phenomena
Criteria: based on objective observations & must be testable
Tested and tested until falsified
If can’t be falsified it becomes a theory

1
Q

Scientific method

A

Process in which researchers gather facts through observations and formulate scientific hypotheses and theories

2
Q

Theory

A

Well tested and widely accepted view that explains certain observable facts

3
Q

Earths spheres

A

Hydrosphere
Atmosphere
Biosphere
Geosphere

4
Q

Hydrosphere

A

Water portion of planet

One of the traditional subdivisions of earths physical environment

5
Q

Atmosphere

A

Gaseous portion of earth
90% occurs within 10 miles of earths surface
Energy changes btwn atmosphere & space and atmosphere & earths surface effects weather and climate

6
Q

Biosphere

A

Parts of the solid earth, hydrosphere, and atmosphere on which all living organisms can be found

7
Q

Geosphere

A

Solid earth
Largest of all spheres
6400 km to center of earth
Made up of core mantle and crust

8
Q

Core

A

Dense inner sphere
Iron and nickel with a bit of oxygen silicon and sulfur
Outer core- liquid 2260 km thick
Movement of metallic iron that generates magnetic field
Inner core- solid 1216 km thick
Solid due to pressure

10
Q

Mantle

A
82% earths volume
solid high density rock
2890 km thick
upper and lower mantle
olivine and silica rich
11
Q

upper mantle

A

660 km deep
top is lithosphere
bottom asthenosphere

12
Q

lithosphere

A

sphere of rock
consists of entire crust and upper most mantle
forms earths cool rigid outer shell
100 km thick

13
Q

asthenosphere

A
weak sphere
solid but not mobile
easily deformed
100-650 km 
upper part some melting
14
Q

lower mantle

A

strengthens with depth bc of pressure

very hot and gradual flow

15
Q

crust

A

low density rock
continental and oceanic crust
thickness 7-70km

16
Q

mesosphere

A

lower

mobile/fluid

17
Q

earth system

A

b