Weathering And Soil, 6th Grade Question Preview (ID: 60310)
Rocks And Weathering.
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The processes that happen on Earth today are the same ones that happened long ago
a) uniformitarianis
b) catastrophism
c) conservation
d) grandfather clause
Weathering involves the removal of rock material while erosion is just when chemicals break down rock
a) false
b) true
c)
d)
Mechanical weathering can be done by
a) all of the options
b) abrasion
c) burrowing animals
d) plant roots
Mechanical weathering usually happens quickly
a) false
b) true
c)
d)
Which kind of weathering produces new minerals as it breaks down rock?
a) chemical
b) mechanical
c) physical
d) wind
An agent of chemical weathering is
a) oxidation
b) abrasion
c) burrowing animals
d) removal of pressure
___ is produced when pollution mixes with rainwater.
a) acid rain
b) soil
c) fog
d) smoke
Which climate will see the most weathering?
a) wet and hot
b) wet and cold
c) dry and hot
d) dry and cold
Soil includes
a) all
b) water
c) air
d) decaying organic material
The largest soil particle size is
a) gravel
b) silt
c) sand
d) clay
Soil___ is a measure of how well plants grow in the soil.
a) fertility
b) texture
c) pH
d) goodness
If a soil is really acidic, things won't grow.
a) true
b) false
c)
d)
This soil horizon contains topsoil.
a) A horizon
b) B horizon
c) C horizon
d) bedrock
Which of the following methods is best?
a) rotating crops planted in a field each year
b) planting the same crop each year in the same field
c) plowing in straight lines over a hill
d) getting rid of all leftover plant pieces after harvest
Legumes take ___ from the air or soil and convert it into forms that plants can use.
a) nitrogen
b) oxygen
c) carbon
d) carbon dioxide
Which method of conservation involves plowing dead weeds and stalks from the previous year's crop into the soil?
a) conservation plowing
b) contour plowing
c) crop rotation
d) stubble plowing
Most garden plants grow best in soil with a pH between
a) 6 and 7.5
b) 5 and 6.5
c) 7 and 8.5
d) 4 and 6.5
The organisms that break down the remains of dead organisms are called
a) decomposers
b) mitochondria
c) lysosomes
d) legumes
This horizon forms when bedrock starts to weather.
a) C horizon
b) B horizon
c) A horizon
d) bedrock
Plant roots can cause ___ weathering
a) mechanical and chemical
b) mechanical
c) chemical
d) no
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