Soil Sleuths
What is the amount of each kind of particle in a soil sample?
texture
What is the largest kind of particle in soil?
Sand
What type of weathering happens when rocks rub against each other? And is it chemical or mechanical?
Abrasion
Mechanical
What is the process of rock changing from one type to another called?
What is a fertile soil with equal parts of sand and silt and about half as much clay?
What are the layers of soil called?
horizons
What is the dropping of sediment and rocks in a new location called?
deposition
What type of weathering occurs when water freezes and pushes rocks apart? And is it Mechanical or Chemical
frost heaving
mechanical
What is the process of breaking down rocks?
weathering
What is the primary force behind erosion?
gravity
What is decayed organic material found in soil?
humus
What do we call the sediment that a stream carries?
load
What type of weathering is caused by rain mixed with pollution? Is it mechanical or chemical?
acid rain
chemical
What changes rocks into new substances?
chemical weathering
What forms when unmelted snow gets compacted into ice?
glacier
What are the smallest particles of weathered rocks and minerals called?
sediment
What is a pile of rocks and soil deposited by a glacier?
moraine
What weak acid forms when carbon dioxide mixes with water? Is it chemical or mechanical?
carbonic Acid
chemical
What happens when rocks rub against each other?
Abrasion
What is an example of erosion caused by gravity?
rockslide
What is the process of wind picking up loose sediment and carrying it away?
deflation
What is an area of sediment deposited at the mouth of a river?
Delta
What living organisms can cause weathering by releasing acids? And is it chemical or mechanical?
Lichens
Chemical
What is unweathered rock that influences the soil above it called?
bedrock
What may have caused the bronze statues on the Grant Memorial in Washington, DC, to weather and stain the marble?
Acid rain from pollution dissolved the bronze on the Grant Memorial in Washing DC.
Micah and Joshua like to play by the stream that runs through their grandpa's field. The stream was wide and shallow, but the boys dug out a new path that is much narrower than the old path. How will the new path change the erosion of the stream?
A narrower stream path could change because of faster water, greater erosion, less deposition, deeper streambed.
Why do depositions often have a layered look? (Complete sentences)
Depositions often have a layered look because sediment settles by weight—heaviest first, lightest last
What type of weathering happens when oxygen reacts with rocks, especially iron? Is it mechanical or chemical?
oxidation
chemical
What contains weathered minerals and some nutrients from the humus?
subsoil
What is the difference between weathering and erosion?(COMPLETE SENTENCES)
The difference between weathering and erosion is, weathering breaks down rocks; erosion moves the weathered material