Thursday, July 30, 2009
Tuesday, July 21, 2009
Cornstarch Goo
I have never made this stuff before but it is awesome! Just cornstarch and water. It has a fluid like consistency but when you squeeze it is almost becomes solid like clay and as soon as you let the pressure off it just oozes in your hand. So awesome and weird!
Here is the science behind it: "The cornstarch and water mixture acts like a solid sometimes, and a liquid at other times? Actually, this concoction is an example of a suspension - a mixture of two substances, one of which is finely divided and dispersed in the other. In the case of the cornstarch quicksand, it's a solid dispersed in a liquid.
When you punch the cornstarch quicksand, you are forcing the long starch molecules closer together. The impact of this force traps the water between the starch chains to form a semi-rigid structure. When the pressure is released, the cornstarch flows again.
All fluids have a property known as viscosity - the measurable thickness or resistance to flow in a fluid. Honey and ketchup are liquids that have a high resistance to flow. Water has a low viscosity. Newton said that viscosity is a function of temperature. So, if you heat honey, the viscosity is less than that of cold honey. The cornstarch and water mixture and quicksand are both examples of non-Newtonian fluids because their viscosity changes when stress or a force is applied." http://www.stevespanglerscience.com/experiment/00000088
Wednesday, July 15, 2009
Art Project Catch Up
Things have been busy the last couple weeks so I haven't been good at posting. However, we have still been doing lots of art projects. We are behind in Science projects but we had the fourth of July and played with some small fireworks and last week we went to the zoo. That's got to count as some Chemistry and Biology right?
Bubble Art/Ball Painting
We tried bubble art and it was a huge failure. I couldn't get the paint to bubble up. If someone has any advice that wound be great. So we did ball art instead. It was wonderfully messy.
Glitter Art
This was fun. Some of the neighborhood kids joined in as well. Kaycie wanted to draw her. name. I thought she did a really good job, especially since writing with glue is a little more difficult. Can you see her name? They both made picture by themselves which are under the pictures of their names. Jolie loved the glitter.
Body outlines and Painting
We outlined our bodies in crayon and then colored faces and clothing on. I watch Nico again so he was there too. Then we painted our pictures, which covered up the original drawings. We also painted our bodies. I probably should have took some pictures of that. We were all very colorful.
Green Shaving Cream
I colored the shaving cream green and let them decorate themselves and the bathtub green. I thought it would dye their bodies green but it didn't. It was a lot of fun. I little dye goes a long way. Sorry, no picture.
Bubble Art/Ball Painting
We tried bubble art and it was a huge failure. I couldn't get the paint to bubble up. If someone has any advice that wound be great. So we did ball art instead. It was wonderfully messy.
Glitter Art
This was fun. Some of the neighborhood kids joined in as well. Kaycie wanted to draw her. name. I thought she did a really good job, especially since writing with glue is a little more difficult. Can you see her name? They both made picture by themselves which are under the pictures of their names. Jolie loved the glitter.
Body outlines and Painting
We outlined our bodies in crayon and then colored faces and clothing on. I watch Nico again so he was there too. Then we painted our pictures, which covered up the original drawings. We also painted our bodies. I probably should have took some pictures of that. We were all very colorful.
Green Shaving Cream
I colored the shaving cream green and let them decorate themselves and the bathtub green. I thought it would dye their bodies green but it didn't. It was a lot of fun. I little dye goes a long way. Sorry, no picture.
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