Views: 6 Author: Site Editor Publish Time: 2022-03-18 Origin: Site
Does anyone like to drink cold milk when it's cold? So can kids solve this problem? Today, Alpha Science Classroom teaches kids how to make thermoses and unveil the scientific mysteries about heat through this physical science experiments activity for kids. At the same time, the best learning help is delivered to the children through fun kid's science experiment activities. The materials for this activity are easily accessible at home, so let's start our scientific exploration!
Alpha Science Classroom: How to make a thermos, the materials needed
1 glass jar with lid
1 roll of electrical tape
2 sheets of paper towels
1 sheet of tin foil
1 pair of scissors
Alpha Science Classroom：How to make a thermos, steps to make
Step 1: First, children choose a bottle. Use any plastic or glass bottle with a reusable cap. The bottle should be large enough to hold one person's drink.
In most cases, glass is a better insulator than plastic. However, plastic is cheaper and easier to work with, and it does perform well enough as an insulator to be used for this project. Also, it is important that you use bottles that have reusable caps, whereas many glass bottles do not have reusable caps.
Step 2: Children wrap the bottles in paper towels. Spread out a long piece of paper towel on your work surface. Place the bottle on one end of this piece of paper and gradually roll it onto the paper towel, wrapping the paper towel around it in the process.Your long paper towel should consist of several individual sheets of tissue tied together. Use enough material to cover your bottle at least three times.
Step 3: To make the rolling process easier, kids, place the near edge of the tissue paper sheet against the bottle before you start rolling it.
Try to keep the bottle as straight as possible as you roll so that the tissue paper wraps evenly around the bottle.
When you're done, attach a large piece of electrical tape to the open end of the paper towel to hold it in place.
For added insulation, stick disposable sanitary napkins around the bottle and seal the spaces between the paper towels with electrical tape.
Step 4: Children wrap the bottles in aluminum foil.  Layout a long sheet of aluminum foil on your work surface. Place the bottle on one end of the foil as you would a paper towel, and roll it around the foil, wrapping the foil around it as you go.
Your foil should be at least as long as the tissue paper you are using, if not longer.
Step 5: When you begin, tape the near edge of the foil to the tissue paper on the bottle to hold it in place. Doing this will make it easier for you to roll the foil onto the bottle.
As you roll, keep flattening the foil on the surface of the bottle. Also, make sure you roll the bottle in a straight line so that the layers are even.
If the foil cracks during the wrapping process put tape over the cracks and continue rolling.
Once you have the bottle wrapped, tape up the open end of the foil.
Step 6: The kids need to cut off the excess. Use scissors to cut off any excess tissue paper or aluminum foil that extends beyond the top and bottom of the bottle. Make sure there is enough material at the mouth of the bottle to allow you to sip.
When you trim any excess, remember that the tissue paper layer should not be visible from underneath the foil layer.
Step 7: Kids wrap the bottle with electrical tape. Place the electrical tape on the top of the bottle, starting at or just above the foil layer. Wrap the tape around the bottle in a spiral downward, all the way to the sides of the bottle and down to the very bottom.
The aluminum foil can remain on the bottle even without the tape, but using the tape adds a safety margin.
Black electrical tape, in particular, is the best choice because it also adds another layer of insulation to your temporary thermos.
Step 8: The kids can test the thermos. The construction phase of your thermos is complete. To verify that it works, you should pour hot water into the thermos. Measure the temperature of the water immediately after you pour it in, and then check the temperature every 30 minutes thereafter.
If you are satisfied with the effectiveness of your thermos, you can use it as it currently is. However, if you are still not satisfied, try adding more insulation or try a different method of construction.
Alpha Science Classroom: How to make a thermos flask, scientific principles
A thermos consists of a container with a layer of walls and we have a vacuum between these walls. The purpose of the vacuum is to prevent the transfer of heat by conduction and convection, which can cause the substance in the thermos to become cold quickly.
Heat can be transferred from one plane to another by conduction, convection, and radiation. Conduction occurs when two surfaces of different temperatures come in contact with each other. Convection occurs in fluids such as liquids and gases, where heat is transferred from one place to another by the actual movement of the particles of the medium. Radiation transfers heat through the process of radiation and does not require a medium to do so.
Simple thermos is done, kids can use the thermos to store the made lemonade, show it to your friends! Such interesting children's physical science experiments activities can not only help children learn science knowledge, but also bring fun. Children can continue to explore more kid's science experiment activities, grow up to be the smartest scientists and discover more scientific treasures!
alpha science toys has prepared many kids' physical science experiment kits for children, so that they can explore the mysteries of science in a fun atmosphere and grow up happily!