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Fight epidemic at home
In addition to allowing children to learn online
Singing and playing piano, jumping rope and horses, watering flowers and feeding dogs
What else can be both informative and entertaining
What about activities that can improve relationship between parents and children?
Trick for everyone——
Doscience experiments with your kids
Chopsticks lift rice
Insert chopsticks into rice bottle and find that one chopstick can lift entire rice bottle due to strong friction between chopsticks and rice and between rice and rice.
Taya's flying pig without wings
With a sheet of paper, you can easily play Taiyi flying pig. After all, you can fly without wings!
The power of a sheet of paper
What resistance does sheet of paper cause? Click on video to see it!
Isn't it simple and fun?
These little science experiments
You can not only develop practical abilities in children
It can also develop children's curiosity
Discover wonders of life
Perhaps future scientists will be born from this
The following are 15 very interesting science experiments
You can make it at home
Come and explore world with your kids
Experiment 1. Bouncing Bubbles
Water, dish soap, glue, straws, gloves
1. Prepare a mixed solution of water and detergent in a ratio of 3:1, dip solution into a straw, and then blow bubbles, but bubbles are easy to burst;
2. Mix glue and mixed solution in a ratio of 1:2, then dip solution with a straw and blow bubbles. Wear gloves to touch bubbles. At this time, bubbles are not only not easy to break, but also can bounce off after being touched by hands.
Time to transcribe: The bubble in step 1 is easy to burst due to water evaporation. After adding glue, it will become very sticky, water will not evaporate easily, and strength of bubble wrap will increase. Can jump on back of hands.
Experiment 2: color change
Purple cabbage, hot water, several cups, sugar, lemon, baking soda, alkaline noodles, white vinegar
1. Cut or chop purple cabbage, put it in a cup, soak in hot water, after 10 minutes leave only water and filter purple cabbage.
2. Prepare a cup each of sugar water, lemonade, sparkling water, alkaline water, white vinegar, and boiled water.
3. Pour purple cabbage soaked water into sugar water, lemonade, sparkling water, alkaline water, white vinegar, and boiled water. You will find that original colorless liquid has a new color. And colors are different too.
Transcript Moment: Purple cabbage contains anthocyanins. When substances with different acidity and alkalinity get into it, it enters into a chemical reaction, and color changes. It is red in presence of alkaline substances, blue in presence of alkaline substances and violet in neutral liquids.
Experiment 3. Water rises automatically
Candles, water, saucers, glasses
1. Fill bowl with water.
2. Light a candle and place it in a dish.
3. Place glass on candle.
4. Watch movement of water when candle goes out.
Moment of decoding: when candle goes out, water in glass will gradually rise, and stop after rising to a certain level. As candle burns, oxygen in glass is consumed, and reduced oxygen is filled with water.
Experiment 4: Rainbow Rain
Transparent cup, edible oil, food coloring (1-2 colors, if you don't have it at home, you can try with soy sauce)
Pour a small amount of edible oil into a transparent cup no. 1.1, about 1 cm high.
2. Add 10 drops of food coloring to oil and stir.
3. Take another transparent cup #2, fill it with half a glass of water, pour oil from cup #1 into cup #2, and you will see rainbow rain.
Moment of decoding:Water is insoluble in oil, and water is heavier than oil. The pigment will sink in oil. When it sinks to water-oil interface, pigment will dissolve into oil. water so you can see rainbow rain.
Fifth experiment: floating coin
Disposable cups, paper clips, coins, water
1. Fill a disposable glass with water.
2. Place a paperclip or coin on surface of water with your hand and see if it sinks into water.
3. Fold paperclip into an L-shaped gadget, take paperclip or coin, dip paperclip or coin into water again and see if it sinks in water.
Moment of decryption: Without use of tools, it is difficult for a paperclip or coin to keep its balance when entering water, surface tension of water is broken, so paperclip or coin is immersed in water. water. Using a small tool made from paper clips is more conducive to balance. The surface tension of water supports paper clips so they float on water.
Experiment 6. A book that cannot be opened
1. Overlap each page of two books in turn.
2. Then try to unpair them but find that they can't be unpaired
Deciphering moment: Objects that are in contact and tend to move relative to each other create a friction force. When pull force is greater than friction force or contact surface is smooth, two objects can be separated. When force of pull is less than force of friction, two objects are difficult to separate.
Experiment 7. Angry Bottle
Plastic bottle, baking soda, white vinegar, balloon
1. Pour required amount of white vinegar into a plastic bottle.
2. Fill a balloon with baking soda powder.
3. Put a balloon on neck of a plastic bottle.
4. Raise balloon, let baking soda powder in balloon fall into plastic bottle, and observe phenomenon. (The balloon grows by itself)
Transcript Moment: When baking soda meets white vinegar, carbon dioxide is released, so balloon gets bigger.
Experiment 8: Rainbow Bridge
Paper towels, clear cups, dye (red, green, blue, or any three colors)
1. Prepare three cups of different colored pigmented water one cup at a time. For example, cup #1 is red water, cup #2 is empty, cup #3 is green water, cup #4 is empty, cup #5 is blue water.
2. Use paper towels to connect adjacent cups.
3. Notice how coloring water slowly rises up paper towel bridge into cup next to him, and paper towel bridge becomes a rainbow bridge.
Moment of decoding: This is a capillary phenomenon, water will rise through capillary, gap in paper tissue can be considered as a capillary, so pigment solution will flow down paper tissue to empty cup upwards.
Experiment Nine: Toothpick Boat
Knife, forked toothpick, soap, bowl of water
1. Take half a bowl of water in a bowl of water.
2. Place toothpick in a basin of water and observe phenomenon (the toothpick floats in water but does not move).
3. Scrape a small piece of soap with a knife and insert it into a split toothpick.
4. Gently dip toothpick into water and it will move forward like a boat.
Moment of decryption: it still uses surface tension of water. After dissolving soap in water, resulting surface tension is greater than that of water, so I pushed toothpick and went ahead.
Experiment 10: Wet Paper
Wash basin, water, disposable cups, paper towels
1. Pour required amount of water into water tank.
2. Roll up a paper towel and place it in bottom of a disposable cup.
3. Place a disposable glass vertically in a pool of water and observe phenomenon. (The paper in cup is not wet)
4. Drill a hole in bottom of a disposable cup, repeat experiment and observe phenomenon. (The paper in cup is wet with water)
Moment of decoding: Air takes up space, so when a good cup is placed vertically in water, paper in cup is still dry, but when bottom of disposable cup is drilled, it produces air circulates, so paper towel is wet.
Experiment 11. Egg bouncing
Eggs, white vinegar, cups
1. Pour white vinegar into a cup.
2. Put a raw egg, peeled from shell, into white vinegar.
After 3.1-2 days, remove eggs, rinse them with water and observe changes in eggs. (The shell of egg has disappeared, and white and yolk have also changed, like a pinball, filled with elasticity)
Moment of decoding: The main component of eggshell is calcium carbonate. When they meet with white vinegar, they react and eggshell becomes a soluble substance that dissolves as soon as it is washed. with water. Egg white is rich in protein, which denatures on contact with acid, so it has elasticity.
Experiment 12. Ice Fishing
Glass of water, ice cubes, string, salt
1. Pour some cold boiled water into a glass and put ice cubes in water.
2. Hold one end of rope with your hand, put other end on ice, try, can you catch ice?
3. Sprinkle ice cubes and string with table salt and wait patiently for a few seconds.
4. Raise rope and see if rope can catch on ice.
Transcript: The higher concentration of salt water, lower freezing point. This is principle of using salt to melt icy roads in winter.
After ice cubes are sprinkled with salt, local freezing point drops and ice in that place begins to melt, and melted ice is water, and water has a fluidity that dissolves or washes out salt. The brine concentration in that local area then decreases and freezing point rises again so that it freezes again. If this local area includes place where rope meets ice, then rope is saturated with melt water, and then refreezes together with other ice, and you can catch ice.
Experiment thirteen: unbreakable paper
Paper towels, rolls of paper (the inside of a wide ribbon works too), rubber bands, rolling pin (small), salt
1. Cover paper towel with a rubber band
2. Use rolling pin to try to pierce paper towel and it will pierce
3. If we put salt on a paper towel, we will find that no matter how hard we try, paper towel cannot be pierced.
Moment of decoding: Pour a lot of salt into a paper tube, and when we poke hard with a paper towel, force is transferred from a grain of salt to a grain of salt and, finally, to surface of paper. Thousands of salt particles provide more surface area, distributing force applied by hand so paper is less likely to be pierced.
Experiment fourteen: garlic sprouting experiment
One plastic bottle, one clove of garlic
1. Hang a clove of garlic in a water bottle with pointy end above water. If garlic clove is too small to fit securely in neck of bottle, insert 3 toothpicks into it and hang it over neck of bottle, allowing bottom of garlic clove to enter water.
2. Fill bottle with fresh water every day and keep garlic cloves in water. Watch amazing process of rapid germination and rooting of garlic cloves.
PS: Don't forget to use raw garlic cloves!
Experiment 15. Electricity Generated by Friction
A clean plastic box, tissue paper, a comb (made of plastic), small pieces of cotton thread, wool, fur or nylon fabric trim
1. Tear tissue paper into pieces size of a grain of rice and put a few pieces in a plastic box.
2. Quickly wipe top of box with a rag and see what happens to trash in box? (Garbage will stick to top cover of box)
3. Try to rub comb with a rag, bring cotton thread close to comb, what happened? Will cotton thread be attracted to comb?
Moment of decryption: Static electricity is generated when cloth rubs against a plastic box, and top cover of a plastic box with static electricity will attract scraps of paper.
Real knowledge comes from practice
Act worse than a heartbeat
These little science experiments you can play at home
Parents, let's do this with your children
Be sure to follow safety precautions during experiment
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