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Ecology PASS Review 3
Test Description: 7th Science SC Standard
Instructions: Answer all questions to get your test result.
1) Layers of soil are also called ____.
A
soil quality
B
horizons
C
composition
D
soil profiles
2) Soils form in layers and all the layers make up the __________ _________.
A
soil profile
B
composition texture
C
pH level
D
particle size
3) Nutrient rich, containing a mixture of humus, clay, and minerals, is most suitable for plant growth.
A
bedrock
B
topsoil
C
subsoil
D
parent material above bedrock
4) Decayed organic matter in soil is called ___.
A
silt
B
humus
C
sand
D
clay
5) What depends on the size of individual soil particles and is determined by the relative proportions of particle sizes that make up the soil.
A
composition
B
texture
C
permeability
D
particle size
6) Soil particles that are larger than 2mm
A
sand
B
silt
C
gravel
D
clay
7) How freely that water flows between the pores in soil is known as ____.
A
pH
B
permeability
C
texture
D
composition
8) Regardless of the nutrients present in the soil, if the _____ is not suitable those nutrients will be inaccessible to the organisms.
A
permeability
B
composition
C
pH
D
texture
9) What is a type of fertilizer that alters pH and makes the soil nutrients more accessible
A
pores
B
gravel
C
silt
D
lime
10) What is the best pH for plan growth?
A
8-9
B
10-12
C
2-3
D
5-7
*select an answer for all questions
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