Earth's Layers
Put the layers of Earth in order from least dense to most dense.
Crust, Mantle, Outer Core, Inner Core
What change is occurring when magma slowly cools and then is exposed to intense heat and pressure?
Igneous to Metamorphic
What does the law of superposition indicate?
relative age
What process turns magma into granite?
Cooling
What layer do convection currents occur in?
The Mantle
Does heat contribute to the formation of sedimentary rocks?
No, but erosion, deposition and weathering do
What does radioactive dating (carbon dating) indicate?
absolute age
What processes turns granite into sand?
weathering and erosion
The crust and the upper mantle make up the...
Lithosphere
What type of rocks contains fossils?
100 point bonus if you can explain why other rocks would not
Sedimentary Rocks
Other types of rocks undergo heat and pressure which would destroy fossils
Scientists can estimate absolute age of a rock if they include...
Index fossils
What processes turn sand into sandstone?
compacting and cementing
Which of the following is NOT true about the lithosphere?
1. outer most rigid layer
2. divided into pieces called tectonic plates
3. contains molten rock that flows slowly
4. made up of the crust and the rigid upper part of the mantle
3. the lithosphere does NOT contain molten rock that flows slowly
For an igneous rock to become sedimentary, it must first..
be broken down into sediments
Marine fossils found on a mountain top may indicate...
That this mountaintop was once below the surface of the ocean
True/False
The rock cycle ends after metamorphic rock forms.
False
What is the transfer of energy from a region of higher temperature to a region of lower temperature?
Convection current
For a sedimentary rock to become metamorphic, it must first...
melt
What does the law of superposition state?
oldest fossils are in the bottom rock layers
What are 6 processes that change rocks?
(100 points for each)
1. Heat
2. Pressure
3. Cooling
4. Weathering
5. Erosion
6. Deposition