How Might You Tell Whether or Not Your Toothpaste Contained

question 59

Multiple Choice

How might you tell whether or not your toothpaste contained either calcium carbonate, CaC , or baking soda, NaHC , without looking at the ingredients label?

• A)if the toothpaste bubbles when heated
• B)if the toothpaste bubbles when added to ammonia, such as window cleaner
• C)if the toothpaste produces a salt (NaCl)when added to HCl
• D)if the toothpaste bubbles when added to vinegar

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Definitions:

Proteins

Large molecules made up of amino acids, essential to the structure, function, and regulation of the body's cells, tissues, and organs.

Chromosomes

Structures made of DNA and proteins found in the nucleus of cells, responsible for carrying and transmitting genetic information.

Instructions

Directions or orders given for the purpose of guiding or directing actions.

Epigenetics

The study of how environmental factors affect genes and genetic expression—enhancing, halting, shaping, or altering the expression of genes.