TEKS & Objectives

7.6. Matter and energy. The student knows that matter has physical and chemical properties and can undergo physical and chemical changes. The student is expected to distinguish between physical and chemical changes in matter.

7.1.A demonstrate safe practices during laboratory and field investigations as outlined in Texas Education Agency-approved safety standards

7.12.B identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems;

We will apply chemistry to daily life.

I will identify factors that contribute to dental health.

You should brush your teeth 2 times a day, for 2 minutes each.

1. Watch video.

2. Review vocabulary and complete quiz.

Dental floss A soft thread used to clean between the teeth

Cavity Permanently damaged areas in the hard surface of your teeth that develop into holes.

*You may think that cavities on baby teeth are no big deal since they fall out anyway. In fact, cavities can spread to permanent teeth before they fall out. You have to take care of baby teeth too!

Tartar PA hard calcified deposit that forms on the teeth and contributes to their decay

Gingivitis The first stage of gum disease. It causes irritation, redness and swelling

Look carefully to see the swelling and extra redness.

Here is an image of more advanced, severe gingivitis…

This can happen if the early gingivitis isn’t treated.

3. Brush cola-stained egg.

Remove an egg from the dark cola.
Try brushing the stain off the egg using a spare toothbrush and toothpaste.
If you have it handy, try comparing the effects of regular toothpaste versus whitening toothpaste.
The whitening toothpaste has more abrasive particles that work like sandpaper. It can make your teeth whiter, but can also damage your teeth over time, especially if you brush too hard.

4. Investigate your pierced apple.

The hole you made in an apple yesterday represents a cavity, or hole in your tooth made by plaque bacteria (germs).
Have an adult slice the apple in half so that you can see hole from the inside of the apple.
Examine how the damage has spread.
Now slice the second apple that had no hole in it and compare the two.
How do you think having a hole affected the rest of the apple?
How does this relate to your teeth?

Dental Health 2