Describe the difference between independent and dependent variables. Give
an example of each.
What will be an ideal response?
The independent variable is the variable that is manipulated (changes in value) to
produce a change or effect in the dependent variable. In each of the three problems
posed in this exercise, the independent variable(s), such as the amount of protein
consumed daily by a hog, temperature, humidity, feed quality, or the amount of
"green stuff" on the pond surface, produced an effect on the dependent variable (hog
body weight, chick mortality, fish mortality). Suggest to your students that they
develop a hypothesis with independent and dependent variables that they are
interested in. This hypothesis could lead to the design of an FFA project, 4-H
competition project, or a science fair project.
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The primary purpose of full-depth blocking in a floor frame is to
A) reduce tensile stresses in floor joists. B) give additional nailing surface for a gypsum board ceiling. C) give additional nailing surface for floor sheathing. D) prevent buckling of floor joists. E) reduce compressive stresses in floor joists.
Today, overhead sprinklers used for irrigation use _____ pumps
a. High pressure, low-volume c. High pressure, high-volume b. Low pressure, low-volume d. Low pressure, high-volume
Answer the following statement(s) true (T) or false (F)
Windows should be installed to be airtight as well as watertight.
The OBD-II evaporative emission system monitor on a 2008 vehicle can detect a hole as small as ________
A) 0.200" diameter B) 0.020" diameter C) 0.400" diameter D) 0.040" diameter