1 / 10

Science Fair project

Science Fair project. Step 1 Big Question. · What are the best temperature conditions for growing the largest, purest crystals?. Step 2 Hypothesis. · My hypothesis is that if the saturated solution is cooled quickly the best crystals will form. Step 3.

sheba
Download Presentation

Science Fair project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Science Fair project

  2. Step 1 Big Question • ·What are the best temperature conditions for growing the largest, purest crystals?

  3. Step 2 Hypothesis • ·My hypothesis is that if the saturated solution is cooled quickly the best crystals will form.

  4. Step 3 • I learned that crystals are solids made of molecules in a specific repeated pattern . • I learned that crystals can form out of a saturated solutions. • A saturated solution is when you cannot dissolve any more solids in water or other substances. • I also learned that you can dissolve more sugar in hot tea than cold tea. • Crystals form when a hot saturated solution is cooled . • Cooled water cannot hold the solids and so the solids come out of the solution in crystal form.

  5. Step 4 Experiment • ·Lab notebook • ·Large bowl • ·Ice, enough to fill large bowl at least three times • ·Water • ·Thermometer • ·String • ·Scissors • ·3 Pencils • ·3 large drinking glasses • ·Pot with a lid • ·Borax • ·Tablespoon • ·Plastic wrap

  6. Step 5 • The refrigerator had the most crystals.The room temp. had the least amount of crystals. The ice bath had the medium amount of crystals. The ice bath was 32 degrees. The room temp. was 70 degrees. The refrigerator was 41 degrees.

  7. Step 6 Data • COOLING CONDITIONS TEMPERATURE TIME NUMBER SIZE OBSERVATIONS • ICE BATH 32 degrees 7hrs medium big random shapes • REFRIGERATOR 41 degrees 7 hrs most biggest random shapes • ROOM TEMPERATURE 70 degrees 7 hrs least small cubed shaped

  8. Step 7 Analysis of data • My experiment tested my hypothesis which was that if a saturated solution is cooled quickly the best crystals will form .I tested this by putting the saturated borax solutions in three different temperature, one that cooled quickly (ice bath) , one that cooled less quickly (refrigerator) and one that cooled slowly (room temperature) and after 7 hours I checked each and recorded my results .

  9. Step 8 Conclusion • My hypothesis was not correct. The borax solution cooled in the ice bath did not produce the best (largest number of nice cube shaped) crystals. The ice bath produced a medium number of medium sized crystals of random shapes. The refrigerator had the most and the biggest crystals but they were not all cubed shaped. The room temperature crystals had the least amount but were cubed shaped. As I did more research I discovered that the crystals that should have done the best was the room temperature because the crystals have more time to arrange in a cube shape.

  10. Step 9 References • http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p082.shtml?fave=no&isb=c2lkOjEsaWE6Q2hlbSxwOjEscmlkOjQwOTE4Mzc&from=TSW • ttp://www.ehow.com/how_3866_grow-borax-crystals.html

More Related