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Lock in with the kids: Six interesting science experiments to try at home during school holidays

Due to school holidays and lockdowns in many states, you may be looking for fun activities that you can do at home.
We have found some interesting and easy-to-do activities that do not require many materials other than those you already have at home.
Oobleck, slime, corn flour viscous; whatever you call it, this mixture of 1 part water and 1.5 parts corn flour is a classic experiment to try at home.
When you apply a force to it (such as pushing it), Oobleck is hard, but when you place it alone it is more like a liquid-this is called a non-Newtonian fluid.
A non-Newtonian fluid does not have a fixed viscosity—on the contrary, it changes when subjected to force, becoming more liquid or solid.
Use your Ou Bu crack, try to hold it, squeeze it, and then dip your hands into a bowl of mucus.
Follow the video to extract purple liquid from cabbage, and then test the acidity (pH) of different items in the kitchen.
Red cabbage contains an indicator pigment molecule called flavin, which is a molecule called anthocyanin.
This ranges from the bright red color of very acidic solutions to the initial purple color of neutral solutions to the yellow-green color of alkaline solutions.
You can test various things around the house; orange juice, milk, sodium bicarbonate, and some more exotic solutions such as cleaning supplies.
For those who like to bake in isolation, or who are still keen to try homemade bread, why not explore the science behind yeast at the same time?
To imagine this, you can mix yeast, sugar, and warm water in a bottle and put a balloon on the mouth of the bottle.
For curious scientists, this is a great opportunity to design an experiment to test the effects of different temperatures, sugar levels, and even try other food sources such as honey or syrup.
This experiment will impress people of all ages, but the explanation can be a bit complicated, involving temperature and pressure.
Putting peeled boiled eggs on the opening prevents air from entering and exiting, resulting in insufficient oxygen flame and creating a pressure difference between the inside and outside of the bottle.
As the flame goes out, the air in the bottle cools down, forming a partial vacuum, pushing the egg into the bottle.
To investigate further, try to figure out how to remove the egg (don’t break the bottle or egg).
For another egg-related experiment, try dissolving the egg shell with vinegar to obtain a transparent, elastic egg, or if you have extra eggs, you can explore the strength of the dome shape by walking on top of an egg.
Beat the cup with a strong gust of wind (shaped like an invisible doughnut) and blow out the candles.
For a simple construction, all you have to do is stretch a balloon at the top of a plastic cup with a hole at the bottom.
As for why it is called a vortex cannon, the shape formed when the air comes out is a very stable annular vortex, or doughnut shape.
This is because when the air outside the gust starts to slow down and fall behind, it will be pulled into the center of the gust and rotate in a circular motion.
The stalactites fix the “tite” on the ceiling, and the stalagmite “mites” will one day reach the top (or place ag in it for the ground).
Creating a super-saturated Epsom salt or baking soda solution—that is, adding more salt until it no longer dissolves—provides the perfect environment for crystal growth.
As the liquid evaporates, the salt will begin to form crystals at this lowest point, and each drop will make the stalactites grow longer, and stalagmites will grow out of the plate.
We recognize that Aboriginal and Torres Strait Islander people are the first Australians and traditional guardians of the land where we live, study and work.
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Post time: Jul-13-2021

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