_____ is one way urban gardeners have chosen to deal with soils that have been polluted by lead or other industrial contaminants
A) Removing tons of contaminated soil and bringing in new soil?
B) Treating the soil with lime or potassium?
C) Planting a garden and hoping for the best?
D) Using raised beds
D
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Kerfing is used to _____.
a. allow the board to bend b. allow one board to be placed over another c. create air pockets to trap thermal energy d. lighten the board before it is mounted
After the catfish eggs hatch, these small fish are called _____
A) roe B) fingerlings C) broods D) fry
In the GTAW process, contamination left on the metal will be deposited in the weld because ____.
A. the low arc temperature does not vaporize it B. the low amperage does not allow it to be burned off C. tungsten contamination is a constant problem that cannot be eliminated D. there is no flux to remove it
Answer the following statement(s) true (T) or false (F)
Water vapor tends to condense onto warmer surfaces.