8/27 Step 1 Experimental Design Warm Up AP

Last updated 12 months ago

1 question

Scientists are interested in investigating the possibility that plants can be used to remove heavy metals from contaminated soil. They divide a sample of soil with heavy metal contamination into five different pots and plant five different species of grass they believe will take up metals into their roots and leaves. They also plant the same grasses in five pots with uncontaminated soil. After allowing the grasses to grow for a month, they cut the grass and measure the concentration of metals in milligrams per kilogram.

Match the step of experimental design with its step from the experiment.

Draggable item		Corresponding Item
Independent variable		The pots growing grasses in uncontaminated soil
Dependent variable

Draggable item		Corresponding Item
Independent variable		The pots growing grasses in uncontaminated soil
Dependent variable		Species of grasses
Hypothesis		Concentration of metals in milligrams per kilogram
Data		Species A will absorb the most heavy metals
Control		Species A - 5 mg/kg Species B - 3 mg/kg Species C - 1 mg/kg Species D - 10 mg/kg Species E - 4 mg/kg