Lampara De Lava

Lava lamp lab Name;

Mrs. George Period:

Objective: Students will be able to explain what is happening in their “lava lamp” using their knowledge of chemistry and density.

Materials:

Clear beverage bottle

150 ml of water

150 ml of oil

several drops of food coloring

beaker for measuring

funnel

Procedure:

1. measure 150 ml of tap water.

2. Using the funnel, add the tap water to the bottle

3. Measure 150 ml of oil

4. Using the funnel, add the oil to the bottle (tip the bottle slightly and aim the funnel toward the side of the bottle)

5. Record your observations

6. Add several drops of food coloring to the bottle

7. Record your observations

8. Break up an Alka Seltzer tablet in pieces that will fit through the opening of the bottle.

9. Drop in the Alka Seltzer (do not put the cap on the bottle).

10. Record your observations

Step observations

Oil is added to water

Food coloring added.

Alka Seltzer tablet added

Draw conclusions about your observations. Please be sure to include the chemical change that occurs, and be sure to draw conclusions about the density of molecules in this lab. Be thorough!

Type your final assignment and include a typed data table with all of your observations. The data table should look like the one on this document except that your observations will be typed in the blank space. USE THE RUBRIC BELOW!

Category Excellent 4 pts Good 2.5-3.5 pts Needs work 0 – 2 pts

Data Table Data table is typed with thorough observations recorded and no spelling or grammar errors Data table is neatly typed with adequate observations recorded and less than 2 spelling or grammar errors Data table is typed with minimal observations

Conclusion format Conclusion is neatly typed in proper paragraph form with no spelling or grammatical errors Conclusion is neatly typed in paragraph form with 2 or fewer errors Conclusion is typed in paragraph form with more than 2 errors

Chemical change The chemical change that occurred in the lab is identified and explained thoroughly, including how it differs from a physical change. Chemical change is identified and somewhat explained, including how it differs from a physical change. Chemical change is identified but explanation is inadequate.

Density Conclusion compares the density of all substances used in the lab and describes the observations thoroughly using the concept of density. Conclusion compares the density of substances used in the lab and connects observations to density but not as thoroughly as the excellent category Comparison of substance using density has errors or is done in a limited way.

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