10.4-11.2 Flashcards
Is the process by which rocks are broken into smaller fragments or particles
Weathering
What are the two types of weathering?
●Physical weathering
●Chemical weathering
It is the disintegration of rocks and minerals by physical or mechanical means
physical weathering
It is the chemical alteration of decomposition of rocks and minerals
Chemical weathering
It occurs entirely on Earth’s surface
Physical weathering
It occurs on Earth’s surface as a result of ________, ______, or ________
●exposure to temperature
●weather
●wedging action
Are cracks or brittle fractures in rocks
joints
lt causes rocks to break
contraction and expansion
It may cause expansion and eventually causes rocks to break
sudden exposure to high temperature
These are a usual occurrence brought about by the growth of roots of big trees
Cracked pavement or sidewalks
What are the common types of chemical weathering
●Hydrolosis
●Oxidation
●Complete dissolution or carbonation
It is when rocks react with the hydrogen in water
Hydrolosis
Hydrolosis is most common in _______ and ________ rocks
●Igneous
●Metamorphic
It is caused by the abundance of free oxygen at the surface, which may react with minerals
Oxidation
Are examples of rocks that result from oxidation
●Hematite
●Limonite
●Geothite
It occurs when minerals in rocks are dissolved by water
complete dissolution
Is a weak acid that forms when carbon dioxide mixes with water
carbonic acid
It is formed by the weathering of rocks by various factors
soil
what are the various factors of weathering to form soil
●rain
●sunlight
●heat
●freezing
●thawing of water
How many years does it take to form an inch of topsoil
500 years
soil is made up of?
●minerals
●organic materials
●air
●water
●living organisms
It is produced when a layer parallel to the soil surface shares similar characteristics
soil horizon