Posts Tagged ‘cookies’

The Speed of a Rotating Cookie

Monday, August 29th, 2016

speed-of-a-rotating-cookie

Today we are baking a gigantic cookie, and then we will spin it! We are attempting to determine the speed of a rotating cookie, and I will compare it to a merry-go-round.

First you need to go into your kitchen and bake a huge chocolate chip cookie.

baking-cookiesThis post contains affiliate links. I was compensated for my work in writing this post.

You can use your favorite cookie dough recipe. My daughter Rachel tells you how much of each ingredient she used to make her cookie:

This fun experiment is from Christian Kids Explore Physics by Bright Ideas Press, In the chapter on motion, the book describes how to figure out the speed of a merry-go-round. First you need to determine the circumference of the merry-go-round.

C = 2π r

The radius of the merry-go-round is 5 feet.

5 times 2 times 3.14 equals 31.4 feet. So the distance around the merry-go-round is 31.4 feet. That means every time Rachel goes around, she travels 31.4 feet.

Now we need to determine how fast the merry-go-round is going. My son pushed Rachel around as hard as he could while my other son timed 15 seconds. I counted how many times Rachel went around in 15 seconds. The answer was almost 4 times–3.75 times is more accurate, as you can see if you watched the video. 3.75 times 4 equals 15 revolutions per minute. (A minute has 4 segments of 15 seconds.)

To determine how many feet Rachel traveled in one minute while riding the merry-go-round, multiply the circumference by the speed. She traveled 471 feet per minute!

merry-go-round-physics

In the video I show you how to determine the speed of your rotating cookie at home, depending on how big it is and how fast you spin it. Who knew physics could be so fun and delicious!

Civil War Treats: Molasses Cookies

Monday, July 13th, 2015

molasses-cookies-civil-warThis post contains affiliate links. I was compensated for my work in writing this post.

If you are studying the Civil War time period, why not make some old-fashioned molasses cookies? These Civil War molasses cookies are yummy!

We got this idea from All American History, Volume II, which we are using in our study of the Civil War. When doing hands-on activities, it’s wonderful to be able to taste the time period. This is why we chose to make Civil War molasses cookies.

molasses-cookies

Civil War Molasses Cookies (Recipe)

Ingredients

  • 1/3 cup brown sugar
  • 1/3 cup shortening
  • 1 egg
  • 2/3 cup molasses
  • 2 3/4cup flour
  • 2 tsp cinnamon
  • 1 tsp ginger
  • 1 tsp baking soda
  • 1 tsp salt

Instructions

Cream together shortening, brown sugar, egg, and molasses. Stir in flour, baking soda, salt, cinnamon, and ginger. Chill in the refrigerator for at least one hour.

Heat the oven to 375 degrees and roll dough out to 1/4.” Cut out cookies with a round cutter (use either a glass, a lid, or a round cookie cutter). Place on a baking sheet; bake for 10 minutes.

molasses-cookie-dough

Video Tutorial: How to Make Civil War Molasses Cookies

Watch me as I make these delicious old-fashioned molasses cookies:

Transformer Cookies

Monday, December 27th, 2010

transformer-cookiesA woman I went to boarding school with in Guatemala told me how she made Transformer cookies with her sons, and what a success it was. She just used a gingerbread man cookie cutter and squared off the head, arms, and feet. I thought that was a great idea, so we made them.

My oldest son Bryan actually sculpted a more complicated Transformer with a metal spatula while the dough was still on the counter. Then we iced the cookies with icing. I was able to get such bright bold primary colors from icing dye made for professionals who decorate cakes for a living. You can buy the icing dye from craft supply stores that have a cake-decorating aisle.

transformer-cookies3We added more details with black icing gel, which you can get at a regular grocery store. You could also add M+M’s and other candy for the buttons of each robot. The finished Transformer cookies looked good enough to eat!

transformer-cookies2transformer-cookies4transformer-cookies5transformer-cookies6

Maple Leaf Cookies

Saturday, September 18th, 2010

maple-leaf-cookies

I had sugar cookie dough left over from a different project, so I decided to make maple leaf cookies. I found a plastic maple leaf cookie cutter at Hobby Lobby for 75 cents. My five-year-old rolled out the dough, and the kids took turns cutting out their leaves with the cookie cutter.

maple-leaf-cookies-2

After baking and cooling the cookies, I mixed up some autumn-colored frosting. I put lots of yellow food coloring into white frosting to make the burnt orange color. (Use professional food coloring – it’s much brighter than what you dye Easter eggs with.) For the maroon color, I looked at the food coloring and realized I had no red. I used lots of hot pink. My husband walked past, and I asked him what color to add to make the pink color turn into maroon? He said blue. For a minute I thought it was going to turn brown. (I should have just used chocolate frosting then!) But after mixing it some more (and throwing in some cocoa powder), I saw a lovely maroon color. I dusted the cookies with cocoa powder.

icing

This is a great baking activity to do in the autumn, since maple leaf cookies reflect what is happening in nature. I love how these maple leaf cookies turned out!

 

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