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Ch 11 test
Mrs bennetts test on 2-7-08
35
Science
6th Grade
02/02/2008

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Cards

Term
Soil is a mixture of weathered rock, mineral fragments, water, air, and
Definition
Decayed organic matter
Term
The layer of soil that contains the most organic material is called the
Definition
A horizon
Term
Litter often covers the
Definition
A horizon
Term
Is mechanical weathering caused by carbonic acid?
Definition
no
Term
Chemical weathering is more rapid in
Definition
warm, wet climate
Term
Mechanical weathering is more rapid in a
Definition
cold wet climate
Term
Soil erosion can be slowed by
Definition
shelter belts, no-till farming
Term
the rate of weathering depends upon the area's
Definition
climate
Term
the rock and mineral fragments in soil come from rock that has been
Definition
weathered
Term
The diffrence between mechanical and chemical weathering is
Definition
the way they effect the rock
Term
Plants cannot grow without
Definition
soil
Term
what region regions are especially vunerable to erosion because their soils are g\useful to farmers for only a few years before their nutrients are gone?
Definition
tropical
Term
Ice wedging is brought about by
Definition
water freezing and thawing
Term
Minerals found in the B horizon were dissolved in water and carried there by a prosses called
Definition
leaching
Term
Five factors that affect soil development are
Definition
1. climate
2. slope of land
3. type of rock.
3. vegitaion
4. time
Term
When water mixes with carbon dioxide gas in the air or soil,
Definition
carbonic acid forms
Term
What turns and loosens soil, improving it for crops, but leaving soil vulnerable to erosion?
Definition
Plowing
Term
When does soil erosion occur?
Definition
Overgrazing forest harvesting steep slopes
Term
three horizons in figure 7-1 make up soil
Definition
profile
Term
what horizon in figure 7-1 contains the most humus?
Definition
A
Term
what horizon shown in figure 7-1 has the least organic matter
Definition
C
Term
what horizon shown in figure 7-1 is the most like the parent material?
Definition
C
Term
Topsoil is the what horizon in figure 7-1
Definition
A
Term
When farm aminals eat the grass on land until there is almost no ground cover, it is called
Definition
overgrazing
Term
what is made out of dead plant and animal matter that has decayed due to bacteria and fungi?
Definition
Humus
Term
Discribe the factors that influence the development and type of soil in a certain area.
Definition
Factors are time, slope,climate, amount of vegitation, and type of rock
Term
Name three things farmers can do to reduce soil ersoin shelter belts, contour farming and No-till farming
Definition
Term
____ was a jew from nazareth that preached from AD 30 to AD 33
Definition
jesus
Term
____ was a jew from nazareth that preached from AD 30 to AD 33
Definition
jesus
Term
____ was a jew from nazareth that preached from AD 30 to AD 33
Definition
jesus
Term
____ was a jew from nazareth that preached from AD 30 to AD 33
Definition
jesus
Term
roman officals began to see the christans as a threat to the ____ ____ ____
Definition
their religious beliefs
Term
to _________ means to mistreat or torture someone
Definition
persecute
Term
gunpowder was invented by the ________
Definition
chinese
Term
prince shotoku used china as an example for japa ______ ______ ______
Definition
from one another
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