Recommended for 4th graders! A collection of easy self-study ideas to try

Comparing how salt and sugar dissolve in water

Which dissolves more easily in water, sugar or salt?

In connection with the way substances dissolve, which is studied in 5th-grade science, let’s compare how salt and sugar dissolve in water.

For the same amount of water, which dissolves more—salt or sugar? Also, as the water temperature increases, how does the amount that dissolves change for salt and for sugar? Summarize the results you obtain through experiments in a report.

In addition to salt and sugar, look for other substances that dissolve well in water, substances that dissolve better when the water temperature is raised, and substances whose solubility does not change much even when the water temperature is increased.

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Hane Keisuke

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Ice experiment using saltwater

Serious experiment!! Does the temperature change with the amount of salt?! Super-cold Experiment 2!! Great for independent research! / Denjiro Yonemura [Official] Science Experiments / cryogen

For independent research projects, it seems many people make crafts.

So why not stand out by doing a chemistry experiment instead? Many of you probably know that adding saltwater to ice lowers the temperature.

But does the degree of cooling depend on the amount of salt? How about this experiment, which allows for solid research with simple preparation—just ice, saltwater, and a thermometer?

Handmade claw machine

[Challengers Wanted] Win lavish prizes with our handmade claw machine

Crane games that let you grab candy, plush toys, and figures are popular with kids.

Let’s try making a homemade device so you can enjoy the excitement of “I wonder if this prize can be picked up with this arm movement…” at home.

Build the main body using cardboard or empty boxes.

Next, create the crane arm with straws or wooden chopsticks, and connect it with thread so it can move.

Prepare prizes you like, such as small toys or snacks.

By researching how crane games work as you build, you’ll also discover the fun of crafting.

This is a science project idea that’s enjoyable not only during the building process but also when you play with the completed game.

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mutō

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Homemade butter

[Independent Research] Homemade Butter You Can Make Just by Shaking Heavy Cream [Cooking]

This is a science project using store-bought heavy cream.

You’ll need heavy cream, salt, a plastic bottle, and some stamina! In this project, you pour liquid heavy cream into a plastic bottle and turn it into butter.

The method is very simple.

First, pour heavy cream into a 500 ml plastic bottle.

Next, add half a teaspoon of salt.

Then put the cap on the bottle and shake it nonstop! Keep shaking until it becomes solid! It’s quite tiring, but in the end you’ll have delicious butter, and your family will be thrilled!

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Yoimachi Jēn

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Research about Japanese tea

[Independent Research] Become a Tea Expert in One Day—Teach Your Teacher, Too!

When time is limited, it’s hard to prepare anything unusual, isn’t it? So here’s something to try: a study of Japanese tea.

You should be able to find tea leaves at nearby stores like supermarkets or shopping malls.

Once you get some, explore how the flavor changes with water temperature and steeping time, and figure out the best way to brew it for the most delicious taste.

Since you’ll probably be brewing a lot of tea, having paper cups on hand will be convenient! You could also look for traditional Japanese sweets that pair well with tea.

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yamamoto

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