A set of subjects held to the same conditions as those experiments but without being exposed to the independent variable
What is a control group
100
The largest soil particle is
a. Sand
b. Silt
c. Clay
What is sand
100
Soil is approximately ___% minerals
a. 5
b. 25
c. 45
d. 75
What is 45%
100
Which mater horizon is known as topsoil?
a. O
b. A
c. E
d. B
What is A
200
Poses a potential cause-effect relationship between two variables
What is hypothesis
200
Researchers who conduct _______________ attempt to answer scientific questions without having an immediate use for the answer.
What is basic research
200
The smallest soil particle is
a. Sand
b. Silt
c. Clay
What is clay
200
Soil is approximately ____% organic material
a. 5
b. 25
c. 45
d. 75
What is 5%
200
Which master horizon is known as the leached horizon?
a. O
b. A
c. E
d. B
What is E
300
The manipulated variable
What is the independent variable
300
Variables held constant throughout an experiment.
What are controlled variables?
300
Which of the following is a soil forming factor
a. Time
b. Topography
c. Parent Material
d. All of the above
What is d. All of the above
300
Which of the following is not a function of soil?
a. Provides a medium for plant growth.
b. Anchors roots.
c. Supplies water to plants.
d. None of the above
What is none of the above
300
Which master horizon is known as the subsoil?
a. O
b. A
c. E
d. B
What is B
400
The variable that is measured
What is the dependent variable
400
Tentative ideas that account for the data collected in an experiment.
What are inferences
400
Soil is approximately ____% water.
a. 5
b. 10
c. 25
d. 50
What is 25%
400
The matter from which the soils originally formed is known as __________
a. Parent material
b. Organic matter
c. Minerals
d. Air
What is parent material
400
Which master horizon is the bedrock?
a. O
b. E
c. C
d. R
What is R
500
Specific data collected during the experiment.
What are results?
500
Researchers who conduct ____________ seek to resolve a specific question with the results being used immediately to identify solutions.
What is applied research?
500
Soil is approximately ___ %air.
a. 5
b. 10
c. 25
d. 50
What is 25%
500
Which master horizon is composed of organic material?
a. O
b. A
c. E
d. B
What is O
500
The top layer of the earth's surface, consisting of rock and mineral particles mixed with organic matter is known as _______.
a. Soil
b. Dirt
c. Parent Material
d. Rock