Rock Types
What is melted rock called
lava/magma
Tensional Stress
Tensional stress is the stress that pulls two rocks apart.
List the three main types of weathering
Physical
Chemical
Biological
How do you make Igneous rocks
by melting a rock then cooling it back off
This test determines hardness
Mohs
hardened or cooled lava/magma
igneous rock
Compressional Stress
Stress that pushes two rocks together.
physical weathering
Physical actions, such as wind, or water freezing and cracking a rock
How do you make metamorphic rocks?
Heat and pressure
for safety in building
Made from heat and pressure
metamorphic
shear stress
This occurs between two rocks when one is being pushed in one direction and the other is being pulled in the opposite direction.
biological weathering
When living organisms break rocks
Sedimentary rocks are made from these parts
sediments
Do all rocks break under the same stress
no
Which type of rock is made from layers of sediment that are compacted and cemented together?
sedimentary rock
What is one way that stress occurs on Earth?
movement of the crust
weathering
chemical weathering
when rock is weathered by chemical reactions
What is compaction?
When sediments are pushed together
What is the term for the strong surface we build on?
foundation
What is the hardest rock?
Basalt
Limestone
Slate
Sandstone
Basalt
Rocks break easier at these spots
planes of weakness
What type of weathering does not cause stress?
chemical
Igneous rocks can change into this type of rock
metamorphic
another igneous
sedimentary
What is a rock engineer called?
geotechnical