Showing posts with label Science Projects. Show all posts
Showing posts with label Science Projects. Show all posts

Wednesday, May 30, 2012

How to peel a RAW EGG?


How do you peel a raw egg?  Science project #2

Start by CAREFULLY placing a raw egg into a glass jar.  We happened to have brown and white eggs so we did one of each.
 

Cover the egg with vinegar. Plug your nose if you can't handle the smell!

Watch & wait...................
My boys thoughts:  Chase thinks the (white) egg will turn yellow. Tanner thinks the egg will grow. After seeing the egg start to fizz in the vinegar they decided that the shell will dissolve.

 Within an hour the brown egg started to look like this:

We happened to be going away for the holiday weekend, so 4 days later this is what our eggs looked like. 
Interestingly enough, the white egg and brown egg both reacted totally different. 

The white eggs shell was completely gone. It had nearly doubled in size and felt like a bouncy ball. It even bounced a little in the bowl. 
 When we broke it open with a spoon, it was still very much in tact inside, although the yolk looked a little rubbery.

The brown egg shell was still there, although it had turned to mush around the egg. It had cracked in several areas and in one spot a part of the yolk was sticking out.

The yolk looked almost cooked a little and there was no membrane left. The shell is obviously still there.


Although it took a few days to do this, it was really fascinating! 

Saturday, May 26, 2012

We're back!

School's out and so I've been scouring the internet for fun science & home/school type ideas. Here is science project #1.  This one talked about  DENSITY. They weren't sure what would happen. They guessed that the combination of all our ingredients would make dish soap.  (??)

You need:
*A glass jar
*Honey
*Karo Syrup
*Dawn Dish soap
*Water
*Vegetable Oil
*Rubbing Alcohol
*Lamp Oil (we didn't use)

Pour equal amounts of each item into the glass jar. (We did 1/2 cup each). Poor slowly, making sure to not hit the sides of the jar. Go in order and watch what happens.
First the honey
 Then the Karo
 Then the dish soap
 Then the water. You could only faintly tell the difference between our soap and water layers
Then Vegetable Oil
 Then rubbing alcohol. Our rubbing alcohol seemed to blend with something else. It didn't sit on top like it was supposed to.

It was very cool to see how quickly everything separated.   Afterwards, we put a lid on, and gave it a good shake. Within minutes it had re-seperated, although the honey & karo mixed and the soap & water mixed.   I don't know that my kids understand density anymore than when we started, but they had fun!