Download +WED Test Review - answers Define: Chemical Weathering

+WED Test Review - answers
Define:

Chemical Weathering
o
Breakdown of rock into smaller pieces because of change in the chemical
composition of its minerals. Examples of chemical weathering: Biotic,
Hydrolysis, Carbonation, Oxidation

Mechanical Weathering
o
Breakdown of rock into smaller pieces without any change in the chemical
composition of its minerals. “physical” weathering. Examples of Mechanical
weathering: Ice Wedging, Exfoliation, Thermal Expansion, Biotic

Primary Consumer
o

Secondary Consumer
o

An animal that relies only on plants for food. Ex: cows, deer, elephants
An animal that eats the primary consumer. Ex: lions, Humans, Snakes
Ice wedging
o
Water fills joints of rocks and freezes. Repeated freeze and thaw cycles
over the years causes rock to break along the joint. (Mechanical
Weathering)

Oxidation
o
Oxygen combines with other elements in rocks to form new types of rock.
(Chemical Weathering)

Weathering
o

Erosion
o

The break down of rock
The movement of rock to a new location
Deposition
o
When the rock stops moving and has settled into a new location

Consumers
o

Producers
o

An organism that breaks down dead organisms
Mutualism
o

An organism that produces (makes) its food. Ex: Plants, Algae
Decomposers
o

An organism that consumes (eats) its food. Ex: Cow, Lion, Deer, Human
A symbiotic relationship where both organisms benefit
Commensalism
o
A symbiotic relationship where one organism benefits while the other is
unaffected

Parasitism
o
A symbiotic relationship where one organism benefits while the other is
negatively effected


What Does WED stand for?
o
Weathering
o
Erosion
o
Deposition
Which natural disaster do you believe causes the most damage to our environment?
Why?

What gas was released during the yeast experiment?
o
Carbon dioxide

If the top portion of plants grow “up”, explain why a small tree on a hillside does not
grow straight out from the hillside?
o
Because of geotropism. Geotropism is when gravity tells the roots to grow
down and the Stem and leafs to grow up towards the sun

A hot and wet climate causes weathering to take place faster than when the
climate is dry and cool.

“shedding” is another work for exfoliation

During photosynthesis, Radiant energy converts into Chemical energy.