Monday, April 26, 2010

YumYum Rice Krispies

For my mini-project, I made HOMEMADE Rice Krispie treats with Alia, Jenny, and Laurie on Saturday April 24th. The pot got a litttttle burnt at the bottom from the fire being too high though. They still tasted delicious!


Photo credit to Alia Saba

Procedure:

  1. Melt 3 tablespoons of butter in a pot.

  2. When fully melted, pour in a 10 oz. bag of regular marshmallows or 4 cups of mini marshmallows.

  3. Mix well. When the butter and marshmallows are blended together thoroughly, add in 6 cups of Rice Krispies.

  4. Press the mixture onto a tray, cool, and cut into squares. (We just ate it all out of the pot since the bottom was burnt anyways. We put some in a cupcake tray for picture taking.)

Science:

  • The heat makes the molecules of the butter and marshmallows move faster, turning them into a liquid form.

  • The marshmallow/butter mixture is sticky and keeps the cereal together. When it hardens, it keeps a strong bond with the Rice Krispies like a web.

  • The burning at the bottom of the pot was caused by overheating. Combustion, an exothermic chemical reaction, occurred. The fire heating up the pot reacted with the food inside it.

Friday, April 16, 2010

IProposeWe Bake Chocolate Chip Cookies




Links:






Materials: flour, salt, baking soda, butter, brown sugar, white sugar, vanilla, eggs, chocolate chips, measuring utensils




Procedure:







  1. Preheat oven to 350 degrees Fahrenheit



  2. In a bowl, combine flour, salt, and baking soda.



  3. In another bowl, beat together butter, brown sugar, white sugar, and vanilla.



  4. Add the mixtures from the 2 bowls together.



  5. Add the chocolate chips.



  6. Scoop golf ball sized pieces of the cookie dough onto a cookie sheet.



  7. Put the cookies in the oven for about 8 to 10 minutes.



  8. Use a spatula to put the cookies onto wax paper or tin foil.



  9. EAT!



Safety Precautions:







  • Use oven gloves when putting the cookies into the oven and taking them out.



  • Keep an eye on the oven at all times.



  • Do NOT touch hot objects with your bare hand.



  • Make sure there is no one in the way when you are carrying the hot tray of cookies.



Scientific Principles:







  1. When baking, a chemical reaction occurs.



  2. Baking soda makes carbon dioxide.



  3. Heat makes the dough cooked and eatable.