11.1
What is Root Wedging?
Where roots grow in a rock and start to split it in the rock
These are dark traces left behind by rivers
Meandering scars
Control Variable
Stays the same
weathering
- the process of breaking down rock.
sediment
- small pieces and grains of weathered rock; also, small pieces of material from living things.
How does the Sun play a role in weathering?
IT heats up rock, then it cools causing expansion.
Where do river lead to?
Oceans and Laakes
How are fossils formed?
after a long time, chemicals in the bones and teeth are replaced with minerals. This process results in a heavy, rock-like copy of the original object—a fossil. Eventually, the sediments and fossil are compressed into sedimentary rock
chemical weathering
- weathering of rock that involves chemical reactions.
river
- a large body of water that flows into an ocean or lake.
Give an example of Chemical Weathering
Rust
What would be considered sediment?
mud, sand, bits of shells, rock pieces,
__________is formed by large pebbles and smaller particles
physical weathering
- physical forces that break rocks down into smaller pieces.
stream
- a small river.
Name two differences between old and young mountains.
New=Sharp
Old=Round
What does the bottom of a river look like if it is moving a slow speed?
very fine
These particles form mudstone
finest particles are clay and silt
frost wedging
- physical weathering that results from freezing water.
channel
- the path that a river or stream follows.
Give an example Physical Weathering
Frost wedging
Thermal expansion
Abrasion
If a river is moving fast, what kind of sediment will be on the river bed?
Large rocks
Independent Variable
Changes
graded bedding
- the order of rocks from large to small that settle on a lake or pond bottom when water flow slows down
meanders
- S-shaped curves in a river.
What is the difference between Weathering and Erosion
Erosion is the movement of that breakdown.
When lookin a a meander; Where is the water moving faster? The inside of the s or outside?
Outside
Dependent Variable
Effected by the Change from Independent
braided stream
- a stream that has many channels that crisscross each other
sedimentary rocks
- rocks that are made of sediments.
What will always win in nature?
Water
In graded bedding what size grains settle on the bottom?
LArge
This layer of fine particles helps you know which direction is “up.” If you know the up direction, you know the
Direction of younging
direction of younging
- the order in which sedimentary rock layers are formed—from larger to finer particles.
cross bedding
- when a graded bedding pattern in a sedimentary rock is cut off and covered with another graded bedding pattern running in another direction.