The two correct answers for defining Earth's layers are:
1. by their chemical compositions
2. by their physical properties
Responses
by their thickness
by their thickness
by their chemical compositions
by their chemical compositions
by their temperatures
by their temperatures
by their physical properties
by their physical properties
by their amounts of land area
1. by their chemical compositions
2. by their physical properties
Responses
inner core
inner core
outer core
outer core
lithosphere
lithosphere
asthenosphere
Responses
Magma cools and hardens.
Magma cools and hardens.
Layers build up over time.
Layers build up over time.
Once-living organisms become buried.
Once-living organisms become buried.
Pressure causes rock to change.
**Pressure causes rock to change.**
Responses
weathering followed by erosion
weathering followed by erosion
compaction followed by cementation
compaction followed by cementation
heating followed by pressure
heating followed by pressure
melting followed by cooling
**melting followed by cooling.**
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Fracture Cleavage
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- **Fracture** refers to an irregular break in a mineral where the surface is rough and uneven. An example would be quartz, which often breaks with a conchoidal fracture.
- **Cleavage** refers to the tendency of a mineral to break along flat, even surfaces, which are typically aligned with its crystal structure. An example would be mica, which cleaves easily into thin sheets.
If you have specific minerals or items you'd like to categorize, please list them, and I can help you determine which exhibits fracture or cleavage!
Responses
It cuts through all the other layers.
It cuts through all the other layers.
It is horizontally-oriented.
It is horizontally-oriented.
Other layers have been deposited above it.
Other layers have been deposited above it.
It has been crumpled and folded, while the other layers lie flat.
**It cuts through all the other layers.**
This indicates that the rock layer is younger than the layers it disrupts.