| This is a science project to test if fluoride actually | | | | sit for about 1 hour. |
| protects your teeth from harsh beverages we eat | | | | Place the group with no fluoride into their glasses and |
| and drink daily. Instead of using our pearly whites will | | | | after the 1 hour place that bunch into their cups. You |
| will test this theory on egg shells. This is an easy | | | | may want to do this in the evening because you will |
| science project for your 7th grade student or middle | | | | want to let these sit overnight. |
| school kid. An 8th grader or high school kid may also | | | | In the morning place a paper towel in front of each |
| want to do this experiment as well. You can make it | | | | glass. Using a spoon remove each egg carefully and |
| as in depth as you need to or as easy as possible. | | | | place on the napkin in front of the cup. |
| You will need these supplies | | | | Using your graph paper make notes from your visual |
| - 10 glasses | | | | observations. Now carefully pick up the paper towels |
| - 10 eggs | | | | and pipe any excess residue from each egg |
| - Soda | | | | separately. Notice the shell exterior of each and make |
| - Vinegar | | | | notes. |
| - Fluoride from a local dentist | | | | Did any particular liquid change the structure of the |
| - Lemon juice | | | | shell? Did more than one beverage change the outside |
| - Coffee | | | | hardness and how? |
| - milk | | | | Compare the fluoride eggs to those with no protection. |
| - Paper towels | | | | Was there a difference in those coated versus those |
| - Graph paper | | | | without? |
| Experiment instructions: | | | | This is where your research needs to come into play. |
| Divide the glasses and eggs in half. Place one in front | | | | If you notice effects of the shell, structure, or strength |
| of each cup. Place 5 of them on side of a table or | | | | decide what could be in these substances to cause |
| counter top and the other half on the other end to | | | | this. For the high school student your need to research |
| keep them separated. Pour soda in a glass at each | | | | the acidic values of each liquid you used to determine |
| end so that you will have two containers with soda in | | | | its ph and acidic strength. If this is for 7th grade or a |
| them, one in each group. Now place vinegar in two | | | | middle school science project just showing that eggs |
| cups the same as the soda. Put coffee in the similar | | | | protected with fluoride were protected may be |
| way and then lemon juice and finally put milk in the last | | | | satisfactory enough or to state that one substance is |
| two. You should have 5 glasses on each side that | | | | strong enough to eat up the shell. Was the fluoride |
| have different liquids contained inside of them and they | | | | effective in protecting the outer coating? |
| are the same as the cups on the opposite end of the | | | | Hope you find this 7th grade science project useful |
| counter. | | | | and get a good grade. Remember it is what you put in |
| Now take the fluoride and wipe it on 5 eggs. Let them | | | | it. |