Tuesday, July 22, 2014

Fire-Resistant Water Balloons--Water science

 This morning I found this neat experiment on the Steven Spangler website.
Perfect for a summer afternoon...although I was very doubtful that it would work.
You need:
An adult
balloons
candle
lighter
water

 
This first video shows what happens when Gracie holds a air filled balloon over a candle flame.
POP!!
Next, fill a balloon with water and then blow it up.
One of the first balloons with water---about 1/4 of a cup of water--was brought into the house, (the tub to be exact) because we couldn't keep the candle burning.
Amazingly, it did not pop...and we held it over the flame--where the water was--for several minutes.
I was impressed.
 
Then Daddy got home, and we had to shown him this amazing sight.
He decided to fill up a water balloon and have at it directly with the lighter.
It would not pop....it balloon wouldn't melt, (like I thought it would)  We tried to get it to pop for at least ten minutes.

 
Look at that soot.  That is not damage to the balloon, but soot from the flame.
Science is amazing!
Taken directly from the Steven Spangler website, here is the explanation of this experiment:

"How Does It Work?

Water is a great substance for soaking up heat.  The thin balloon allows the heat to pass through very quickly and warm the water.  As the water closest to the flame heats up, it begins to rise and cooler water replaces it at the bottom of the balloon. This cooler water then soaks up more heat and the process repeats itself. In fact, the exchange of water happens so often that it keeps the balloon from ever popping! The soot on the bottom of the balloon is actually carbon.  The carbon was deposited on the balloon by the flame, and the balloon remains undamaged." Steven Spangler
 


Sunday, July 20, 2014

Up, up and away

We saw this awesome sight about 10 times today....the plane in the front is pulling the glider behind. If you zoom in you can see the cable. After they reached the proper altitude, the cable dropped off and the glider sailed away.

Which is more dense--salt water or fresh water?

 I found another great water experiment.
Which is heavier, salt water or fresh water?
Supplies needed:
2 clear glasses
water
salt
ice cubes
food coloring
spoons
 Fill the glasses 3/4 the way full.  Our glasses held about 1 cup of water each.
 Add 2 tablespooons of water to one of the glasses.
 stir well
 Add ice cubes to each glass.
 We added food coloring to the salt water solution first.
 This is what it looked like.
 Then, Kimberly added food coloring to the fresh water glass.
 This is what it looked like.
Conclusion:  The ice melted slightly in each glass--leaving fresh water on the top surface of the salt water.  The salt water is heavier than the fresh water--the food coloring stayed on the top, in the fresh water.  The food coloring in the fresh water spread into the water immediately.
And that proves that salt water is more dense than fresh water.

Saturday, July 19, 2014

Our Wild Kingdom

 This evening Laura let out a death curdling scream. She was sitting with her back to the window as this little fellow took a fly leap onto the window.  After I got the appropriate photos, I sent Mark out back to catch the little beauty.
I've seen teeny tiny tree frogs in the past, in fact, we raised from tadpoles about 50 tiny "peepers".  Once they acquired their legs they started climbing out of the fish tank we raised them in.  (We immediately set them free.
This from was much bigger, a little over an inch long.
 
 I did some investigating and I believe it is a gray tree frog.
Gracie, in between screams, learned that gray tree frogs have very sticky foot pads.
Fun find!

Keeping Cool

I tried to convince the kids that this activity was going to provide them with as much fun as the very expensive water park---I don't know if they agree, but they did have fun.
Making a homemade sponge ball.

You need to get 3 plain kitchen sponges.
 Cut each sponge into three pieces.
 
 Tie three sponges together in the middle---tie as tight as you can.

 All ready for a water fight---I mean water fun.



We have found it is better to keep your eyes open when you are trying to catch a soaking wet sponge.

Thursday, July 17, 2014

Water's Tensile Strength--Water Science

 Today we did an experiment...an oldie but a goodie...What makes it even more fun is the fact that this bunch of kids have never done these particular water experiments before.  I forget sometimes that even if something has been done in our homeschool before there are several children who may not have experienced it before.
This time we took a guess has to how many water drops we could get to stay on the top of a penny, (or nickel or quarter)  The guesses ranged from 8 to 10, which, with 4 kids making hypothesis surprised me.  I think they were influenced by each others guesses.
 
 If fact, the highest number of drops was 19.  We learned about tensile strength and the fact that water definitely has "strength" on the outside "skin" of the water.
 Once the water started to flow, it all flowed off the penny.
 31 drops were put onto a nickel.  (This surprised me!)
 We then tried a new to us experiment.
We filled a jar to the very top.  Next, drop pennies gently into the jar, trying not to disturb the water.
 Mark managed to drop 36 pennies into the jar.  In the process a beautiful dome of water rose above the rim of the jar.  The 37th penny sent the water flowing from the jar.
 And what does dish detergent do to the surface of the water.
Sprinkle a bowl of water liberally with pepper.
Dip a toothpick covered with dish detergent into the center of the pepper.
Watch the "magic" happen....or is it science??
video

Wednesday, July 16, 2014

Opening the Box- Green Kid Crafts-July Box

 We recently received our first Green Kid Crafts box.  This was the July box.
They do not offer a sibling subscription, so I ordered 2 boxes for Luke and Kim. (For 2 boxes they have reduced pricing--which is very nice)
 The box was packed very nicely, with an overview of the projects on top.
The back of the overview is a fact card. This months subscription is all about water science.
Perfect for summertime fun.
 Each activity is individually packaged with everything needed included.  Everything included was very good quality.
 The first project we worked on was about water absorption. The instructions were very clear and the kids could read and follow the directions on their own.  (One problem I had was that they spelled "absorption" wrong on the overview card---this really annoyed me.)
 Luke filling his cup with water.
 Then you added the color tablet to each cup of water---stir well.
 Insert a rolled dry paper towel from the filled cups into an empty cup in the middle.
We then watched the capillary action of the water and paper towels.
This didn't happen as fast as the kids wanted, so we turned the activity card over and did the next experiment.
 We took another paper towel (all included) and drew dots with markers that were also included in the box.
 Place the edge of the paper towel into water....watch the capillary action of the water as it carried the colors toward the top of the paper towel....the kids were very impressed with this.
 In the mean time our cups of colored water were doing amazing things.
The water was climbing the paper towel and flowing into the middle cup. As the yellow and blue mixed, green water appeared.
 The final results.  We saved this on the table until Daddy got home from work.
We all agreed this was a great experiment.
 The next day we continued with our box. 
We tried the paper marbling---but this did not work for us.  We were disappointed.  I think the choice of paint they included in both boxes didn't work for this.  We followed the directions exactly.
I don't have a finished product to show.
On the other hand, the wooden boat was a complete success.
Again, everything was included in the box.
 Luke painting his boat.
 Kimberly decorating her sail.
Luckily, we have the perfect little creek in our backyard woods.
Also included in the box was many water balloons for more fun, and also links to other water experiments. On the back of the boat instructions were the instructions for making an ice boat. 
That will be tomorrow's fun.
There are also links to more water experiments. (We have tried a few...you can see them here.)
Overall we really enjoyed Green Kid Crafts and will continue to subscribe.