Views: 7 Author: Site Editor Publish Time: 2021-04-14 Origin: Site
Refrigerator is used most by children at home. Do you know the principle of a refrigerator? How did people keep things cold in the days before refrigerators, and what's the science behind insulation bags and freezers? Today Alpha Science Classroom through simple kids science experiment activities for these questions, and children together to make a cooler, for children to unlock the hidden physical science experiment principle behind it, let the children become a little genius in physics.
Alpha science classroom: materials needed to make a cooler
Two plastic food storage containers of the same size (one needs to be closed tightly).
Ice cubes (at least two ice cubes of the same size)
Two plastic zipper top pockets or smaller food storage containers/cups with a larger capacity
On the work surface, both containers will be equally exposed to external heat sources (such as sunlight or vents). (To speed up the activity, place the container in the sun and/or take it outdoors on warm days.)
An insulating material, such as cotton balls, bubble wrap, crumpled paper, etc. (you can choose more than one), enough to fill a large food container of yours
Mostly fill the inside of one of your plastic containers with insulating material. This is your "cooler."
Place a zip-top bag or smaller plastic container inside each of the larger containers (make sure that the lid on the insulated container will be able to close all of the ways; remove any insulation needed until the lid can close; leave it open for now).
Alpha science classroom: Build a cooler production program
Step 1: The children put ice cubes into each smaller container or bag. Quickly close the lid on the "insulated" cooler container. (Do not put a lid on another larger container.)
Step 2: If the children’s workspace is not very hot, it may take a while for the ice cubes to melt. Do it for another 15 minutes, and then come back. How big are the ice cubes in the opened container?
Step 3: The children continue to check the ice cubes regularly according to the melting speed. Continue to check until it is completely melted.
Step 4: Once the ice cubes have completely melted, turn on the cooler and check the ice cubes. Has it melted completely? If not, how big is it?
Additional: Try to use different insulating materials to make multiple coolers, and even combine multiple layers of insulating materials in one cooler. Which material can make the ice melt the longest? Why do you think so?
Alpha Science Classroom: Let students build cooler observations and results
The alpha science classroom knows that when the ice in the container opened by the children finally melts, you may have discovered that the ice in the insulated container is still almost half its original size! Putting ice cubes in a sealed insulated container can greatly reduce the heat gained through conduction (because the insulating material is not a good heat conductor) and convection (because the lid is sealed, the excess air cannot flow around the ice cubes ) ). If the children’s insulation is opaque, then it can also reduce the amount of heat transferred through radiation-although this is a bigger factor in the sun than doing activities indoors.
Is the kids' cooler working? Does your ice melt quickly? Through the process of making the cooler, children can give play to their creative ability, using different materials to make the cooler, and observe their changes. Today, Alpha Science Classroom is ready for physical science experiments for children. For more fun science experiments for kids, go to Alpha Science Toys to choose the right physics science experiment kit, learn more interesting content, and grow up to be the best physicist.