Flashcards in Mechanical Weathering Deck (33)
Is erosion a process?
Is weathering a process?
weathering is the breakdown of _____ by physical or chemical means
weathering is the breakdown of rock by _____ or ______ means
what is weathering?
the breakdown of rock
What is the product of weathering?
where does weathering happen?
At or near the Earth's surface
For weathering to happen there must be an exposure of rock to what three things?
air, moisture, or living things
what is erosion?
The transport of weathered material
The transport of weathered material is called...
What are the two broad categories of weathering?
mechanical weathering and chemical weathering
Mechanical weathering is a ______ process
Does mechanical weathering involve any chemical change?
No, the minerals stay the same
What is mechanical weathering?
the physical breakdown of rock into smaller and smaller pieces
Where is mechanical weathering prominent?
In dry and cool environments
Chemical weathering involves ______ processes
Can chemical weathering change the minerals in a rock?
Where does chemical weathering occur?
it proceeds most rapidly in wet and hot environments
______ and _____ weathering often work/occur together to breakdown a rock
it is often difficult to separate their effects
______ weathering is the breakdown of rock through physical processes like stress and strain
What are joints in a rock?
cracks in a rock
The more cracks in a rock the more susceptible it is to be broken down by ______ weathering
What is the relationship between the amount of joints in a rock and weathering?
the more joints the more susceptible it is to be broken down by mechanical weathering
Tectonic squeezing and twisting causes ______ to form in a rock underground
when water freezes it ______
What is freeze-thaw action?
When water freezes in the crack of rock it expands and breaks open the crack more
Can roots and burrowing animals cause weathering?
Yes, they can cause cracks to expand and in effect break the rock apart
what is salt crystal growth?
Salt water gets into the joints of a rock, water evaporates, and salt is left behind, crystal growth exerts force . Also, some salt expands when heated
_______ is the process by which little particles are blown against the surfaces of rocks causing the surfaces to become smooth.