Researchers Are Conducting a Study to Determine the Effects of the Mineral

question 16

Multiple Choice

Researchers are conducting a study to determine the effects of the mineral zinc on the human body. The study involves providing pills that contain zinc to one group of human subjects and pills that do not contain zinc or other active ingredients to another group of people. The pills that do not contain zinc are

• A) antidotes.
• B) placebos.
• C) supplements.
• D) probiotics.

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Definitions:

Porosity

The measure of how much of a rock is open space, which could be filled by liquids or gases.

Igneous Rocks

Geological formations that originate from the solidification and cooling of molten rock materials.

Porosity

The measure of empty spaces in a material, indicating its ability to hold fluid.

Permeability

The measure of a material's ability to allow fluids to pass through it, often related to the porosity and texture of the material.