Thinking: Insert a chopstick into a cup filled with rice and lift it. Chopsticks can lift rice and cups.
Up?
Materials: a plastic cup, a rice cup and a bamboo chopstick.
Operation:
1. Fill the plastic cup with rice.
2. Press the rice in the cup by hand.
3. Hold the rice with your hands and put chopsticks between your fingers.
4. Gently lift chopsticks with your hands, and the cup and rice are lifted together.
Explanation:
Due to the extrusion between rice grains in the cup, the air in the cup is squeezed out, and the pressure outside the cup is greater than the pressure inside the cup.
Pressure makes chopsticks and rice grains closely combined, so chopsticks can lift the cup into the rice.
Bottle race
Thinking: two bottles of equal weight, one full of sand and the other full of water, roll down from a height, who will reach the finish line first?
Point?
Materials: two bottles of the same size and weight, sand, water, a rectangular board and two thick books.
Operation:
1. Make a slope with a rectangular board and two books.
2. Pour water into another bottle and sand into the bottle.
3. Put two bottles on the board and let them roll down at the same starting height at the same time.
The bottle filled with water reaches the finish line earlier than the bottle filled with sand.
Explanation:
The friction between sand and the inner wall of the bottle is much greater than that of water, and there will be friction between sand.
Shit, so it's slower than a water bottle.
Creation: change the substances in the bottle and let them compete!
Paid newspaper
Thinking: Without glue, tape and other things, newspapers can stick to the wall without falling off. You know this is
Why?
Material: 1 pencil; 1 newspaper.
Steps:
1. Spread the newspaper and lay it flat on the wall.
2. After a few quick rubs on the newspaper with one side of the pencil, the newspaper won't fall off like sticking to the wall.
Yes
3. Lift a corner of the newspaper, and then let go, and the lifted corner will be sucked back by the wall.
Take the newspaper off the wall slowly and pay attention to the static sound.
Description:
1. Wipe the pencil to charge the newspaper.
2. The charged newspaper was sucked to the wall.
When the air in the room is dry (especially in winter), if you take the newspaper off the wall, it will
Hear the crackle of static electricity.
Creation: Please have a try. What else can be stuck to the wall by static electricity without glue?
Separation of pepper and salt
Thinking: I accidentally mixed the kitchen spices: pepper and salt, how to divide them.
What about driving?
Ingredients: pepper, salt, plastic spoon, small dish.
Operation:
1. Mix salt and pepper.
2. Stir well with chopsticks.
3. Rub the plastic spoon on the clothes and put it on the salt and pepper.
4. Pepper sticks to the spoon first.
5. Move the plastic spoon down slightly.
6. After salt, stick it on the spoon.
Explanation:
Pepper is electrostatically adsorbed earlier than salt because its weight is lighter than salt.
Create:
Can you separate other mixed materials in this way?
Inflatable balloon
Thinking: When will two balloons attract each other and repel each other?
Material: 2 inflatable balloons, 1 string, 1 cardboard.
Operation:
1 Inflate two balloons separately and tie a knot in your mouth.
Connect two balloons with a thread.
Rub the balloon on your hair (or sweater).
Lift the middle part of the rope and the two balloons will separate immediately.
Put the cardboard between two balloons, and the electricity on the balloons makes them attracted to the cardboard.
Explanation:
The electricity on one balloon repels the electricity on the other balloon.
The electricity on the two balloons attracts them to the cardboard.
Creation: Can other small experiments be used to illustrate that balloons are charged?
Lovely watermark
Thinking: The beautiful patterns on rice paper are not drawn, but how are they made?
Materials: 1 washbasin, 1-2 rice paper, 1 chopsticks, 1 cotton swab, 1 bottle of ink and water (about half a basin).
Operation:
1, pour half a basin of water into the washbasin, gently touch the water surface with chopsticks dipped in ink, and you can see that the ink is in the water.
The surface expands into a circle.
......& gt& gt
Question 2: What are the interesting scientific experiments of taking coins out of water?
Pour half a glass of water into a plate and put a coin in it. Don't touch your hands with water, and water can't be poured out. How can I take out coins?
Pour half a glass of water into the plate and drown the coins. Then, light a piece of paper, put it in a glass, and cover the cup on the plate (note: the cup should be covered next to the coin)
The water in the glass began to rise slowly. Finally, all the water in the plate enters the cup, and coins are exposed at the bottom of the plate.
Fishing ice
Grab the ice with an untied rope.
Make a fishing rod with chopsticks and thread. Put some ice in the quilt.
Put the thread on the ice and sprinkle some salt around him.
After a while, the thread froze on the ice and the ice was caught.
Question 3: Are there any interesting and simple scientific experiments? The power of chopsticks
Materials: a plastic cup, a rice cup and a bamboo chopstick.
Operation:
1. Fill the plastic cup with rice.
2. Press the rice in the cup by hand.
3. Hold the rice with your hands and put chopsticks between your fingers.
4. Gently lift chopsticks with your hands, and the cup and rice are lifted together.
Explanation:
Due to the extrusion between rice grains in the cup, the air in the cup is squeezed out, and the pressure outside the cup is greater than the pressure inside the cup.
Pressure makes chopsticks and rice grains closely combined, so chopsticks can lift the cup into the rice.
The power of paper
Material: a glass, water, paper.
Operation:
1. Fill the glass with water (be sure to fill it)
2. Cover the cup mouth with a piece of paper and completely cover the cup mouth.
Turn the glass upside down
4. Water won't flow down
Explanation:
After the second step, the atmospheric pressure in the cup is less than the atmospheric pressure outside the cup, so the atmospheric pressure outside the cup pushes the water into the cup and prevents the water from flowing out.
electrification by friction
Preparation equipment: tissue paper, pencil
Steps:
1. Tear the tissue into pieces as much as possible.
2. Rub the pencil back and forth on your hair for n times.
Put the wiped pencil next to the pile of paper.
Phenomenon: confetti is picked up by a pencil.
Conclusion: When some easily charged substances rub against each other, both friction surfaces can be charged.
Paid newspaper
Thinking: Without glue, tape and other things, newspapers can stick to the wall without falling off. Do you know why?
Material: 1 pencil; 1 newspaper.
Steps:
1. Spread the newspaper and lay it flat on the wall.
2. After a few quick rubs on the newspaper with one side of the pencil, the newspaper won't fall off just like sticking to the wall.
3. Lift a corner of the newspaper, and then let go, and the lifted corner will be sucked back by the wall.
Take the newspaper off the wall slowly and pay attention to the static sound.
Description:
1. Wipe the pencil to charge the newspaper.
2. The charged newspaper was sucked to the wall.
When the indoor air is dry (especially in winter), if you take down the newspaper from the wall, you will hear the crackle of static electricity.
Creation: Please have a try. What else can be stuck to the wall by static electricity without glue?
Separation of pepper and salt
Thinking: I accidentally mixed the kitchen condiments: pepper and salt. How can I separate them?
Ingredients: pepper, salt, plastic spoon, small dish.
Operation:
1. Mix salt and pepper.
2. Stir well with chopsticks.
3. Rub the plastic spoon on the clothes and put it on the salt and pepper.
4. Pepper sticks to the spoon first.
5. Move the plastic spoon down slightly.
6. After salt, stick it on the spoon.
Explanation:
Pepper is electrostatically adsorbed earlier than salt because its weight is lighter than salt.
Create:
Can you separate other mixed materials in this way?
Inflatable balloon
Thinking: When will two balloons attract each other and repel each other?
Material: 2 inflatable balloons, 1 string, 1 cardboard.
Operation:
1 Inflate two balloons separately and tie a knot in your mouth.
Connect two balloons with a thread.
Rub the balloon on your hair (or sweater).
Lift the middle part of the rope and the two balloons will separate immediately.
Put the cardboard between two balloons, and the electricity on the balloons makes them attracted to the cardboard.
Explanation:
The electricity on one balloon repels the electricity on the other balloon.
The electricity on the two balloons attracts them to the cardboard.
Creation: Can other small experiments be used to illustrate that balloons are charged?
Lovely watermark
Thinking: The beautiful patterns on rice paper are not drawn, but how are they made?
Materials: 1 washbasin, 1-2 rice paper, 1 chopsticks, 1 cotton swab, 1 bottle of ink and water (about half a basin).
Operation:
1. Pour half a basin of water into the washbasin and gently touch the water surface with chopsticks dipped in ink. You can see that the ink expands into a circle on the water surface.
2. Wipe the scalp with a cotton swab for two or three times.
3. Then touch the center of the ink circle and see what happens.
4. Gently cover the calligraphy paper on the water, and then pick it up slowly. What patterns are printed on the paper?
Explanation:
1. When the cotton swab touches, the ink will swell into an irregular circular pattern.
2. rubbing a small amount of oil on the scalp with a cotton swab will affect the mutual pulling of water molecules. ......................................................................................................................................................... >
Question 4: There are many simple and interesting small experiments in senior three chemistry. You will encounter many interesting experiments in textbooks or when you are doing problems. Different chemistry textbooks may have different experimental contents. In the title, we may encounter the interesting experiment of "Fountain Experiment". The following experimental summary also comes from the finishing of online awesome experts. Let's study together, hoping to help you.
1, magic wand lighting
Experiment: put a small amount of potassium permanganate crystal on the mirror (or glass), drop 2 or 3 drops of concentrated sulfuric acid on potassium permanganate, dip it with a glass rod, and touch the wick of the alcohol lamp, and the alcohol lamp will light up immediately.
2. Build an "underwater garden"
Sodium silicate (Na2SiO3) was dissolved in water to make water glass with 40% solute mass fraction, and then it was gently mixed with sodium silicate.
Crystal grains of salts, such as chlorides of cobalt, iron, copper, nickel and lead, sulfates of aluminum, iron, copper and nickel, cobalt,
Nitrates of iron, copper and nickel, added to water glass (be careful not to shake), are colorful "flowers".
It grew up slowly.
Step 3 paint
Experimental principle
FeCl3 _ 3 _ 3 solution is blood red in the presence of potassium thiocyanate (KSCN), blue in the presence of potassium ferrocyanide [K4 [Fe (CN) 6]], green in the presence of potassium ferricyanide [K3 [Fe (CN) 6]] and purple in the presence of phenol. FeCl3 _ 3 solution is yellow when sprayed on white paper.
Experimental supplies
White paper, brush, sprayer, wooden frame, nail clippers.
Ferric chloride solution, potassium thiocyanate solution, concentrated potassium ferrocyanide solution, concentrated potassium ferrocyanide solution, concentrated phenol solution.
experimental procedure
(1). Dip in potassium thiocyanate solution and concentrated potassium ferrocyanide solution,
Concentrated solution of potassium ferricyanide and concentrated solution of phenol are coated on white paper.
(2) Dry the paper and nail it on the wooden frame.
(3) Spray FeCl _ 3 solution on white paper with pictures with a sprayer.
4, wood carving or bamboo carving (word) method
Reaction principle: dilute sulfuric acid is heated into concentrated sulfuric acid, which has a strong dehydration effect and makes cellulose
(C6H 10O5)n loses water and carbonizes, so it appears black or brown. Wash off excess sulfuric acid and put it on a wood (bamboo) machine.
Get black or brown flowers or words.
Experimental steps: Draw flowers or write on wood (or bamboo) with a brush dipped in 5% dilute sulfuric acid.
Words. After drying, put the wooden (bamboo) container on a small fire for a period of time, wash it with clear water and put it on the wooden (bamboo) container.
Get a black or brown pattern or handwriting.
5, protein traces
Take an egg, wash the oil on the surface and dry it. Dip the brush in acetic acid and write on the eggshell. After the acetic acid volatilizes, cook the egg with dilute copper sulfate solution, and peel off the eggshell after the egg cools, leaving clear blue or purple handwriting on the egg white, but leaving no trace on the eggshell.
This is because acetic acid can dissolve a small amount of protein after dissolving eggshells. Egg white is a globulin composed of amino acids, which hydrolyzes under weak acidic conditions to produce peptides and other substances, and the peptide bonds in these substances are complexed with Cu2+ and appear blue or purple.
6, automatic long-haired duck:
Cut the aluminum skin into duck shape (rabbit, cat, mouse ... whatever), dip a cotton swab in HgNO3 solution and coat it on the aluminum skin. After a few minutes, dry the mercury nitrate on the aluminum skin. Then you can see that the aluminum duck automatically grows white hair!
Experimental principle: aluminum is an active metal, but the reaction between aluminum and air is prevented because of the dense oxide film on the surface of aluminum. After coating with HgNO3 solution, the dense oxide film was destroyed and Al-Hg alloy was formed, which made it impossible to form a dense oxide film on Al surface. Al can continuously react with oxygen in the air to produce white Al2O3.
Precautions: HgNO3 is a highly toxic compound, so we should pay attention to the protective measures during the experiment!
7. Non-combustible cotton cloth
Cotton cloth is made of cotton. The main chemical composition of cotton is cellulose molecules, which contain carbon, hydrogen and oxygen, so it is flammable. The cloth strips are pre-soaked in 30% sodium phosphate solution, dried in 30% alum solution, and then dried. In this way, there are two chemicals on the cloth, sodium phosphate and alum. Sodium phosphate is alkaline in water, while alum is acidic in water. After their reaction, they not only produce water, but also produce water-insoluble aluminum hydroxide. So in fact, the cotton sliver is wrapped with an aluminum hydroxide film, which becomes aluminum oxide and water after heating. It is this dense alumina film that protects aluminum bars from fire. The treated cotton cloth is widely used in industrial and agricultural production and national defense construction.
8. The glass rod ignited the ice.
......& gt& gt
Question 5: What are the small scientific experiments and what to prepare? Write a simple conclusion about the power of chopsticks.
Thinking: Insert a chopstick into a cup filled with rice, and then lift the chopstick. Can chopsticks lift rice and cups?
Materials: a plastic cup, a rice cup and a bamboo chopstick.
Operation:
1. Fill the plastic cup with rice.
2. Press the rice in the cup by hand.
3. Hold the rice with your hands and put chopsticks between your fingers.
4. Gently lift chopsticks with your hands, and the cup and rice are lifted together.
Explanation:
Because of the extrusion between rice grains in the cup, the air in the cup is squeezed out, and the pressure outside the cup is greater than that inside the cup, so that chopsticks and rice grains are tightly combined and chopsticks can hold the rice cup.
Bottle race
Thinking: Two bottles of the same weight, one filled with sand and the other filled with water, roll down from a height. Who will reach the finish line first?
Materials: two bottles of the same size and weight, sand, water, a rectangular board and two thick books.
Operation:
1. Make a slope with a rectangular board and two books.
2. Pour water into another bottle and sand into the bottle.
3. Put two bottles on the board and let them roll down at the same starting height at the same time.
The bottle filled with water reaches the finish line earlier than the bottle filled with sand.
Explanation:
The friction between sand and the inner wall of the bottle is much greater than that of water, and there will be friction between sand, so its sliding speed is slower than that of a bottle filled with water.
Creation: change the substances in the bottle and let them compete!
Paid newspaper
Thinking: Without glue, tape and other things, newspapers can stick to the wall without falling off. Do you know why?
Material: 1 pencil; 1 newspaper.
Steps:
1. Spread the newspaper and lay it flat on the wall.
2. After a few quick rubs on the newspaper with one side of the pencil, the newspaper won't fall off just like sticking to the wall.
3. Lift a corner of the newspaper, and then let go, and the lifted corner will be sucked back by the wall.
Take the newspaper off the wall slowly and pay attention to the static sound.
Description:
1. Wipe the pencil to charge the newspaper.
2. The charged newspaper was sucked to the wall.
When the indoor air is dry (especially in winter), if you take down the newspaper from the wall, you will hear the crackle of static electricity.
Creation: Please have a try. What else can be stuck to the wall by static electricity without glue?
Separation of pepper and salt
Thinking: I accidentally mixed the kitchen condiments: pepper and salt. How can I separate them?
Ingredients: pepper, salt, plastic spoon, small dish.
Operation:
1. Mix salt and pepper.
2. Stir well with chopsticks.
3. Rub the plastic spoon on the clothes and put it on the salt and pepper.
4. Pepper sticks to the spoon first.
5. Move the plastic spoon down slightly.
6. After salt, stick it on the spoon.
Explanation:
Pepper is electrostatically adsorbed earlier than salt because its weight is lighter than salt.
Create:
Can you separate other mixed materials in this way?
Inflatable balloon
Thinking: When will two balloons attract each other and repel each other?
Material: 2 inflatable balloons, 1 string, 1 cardboard.
Operation:
1 Inflate two balloons separately and tie a knot in your mouth.
Connect two balloons with a thread.
Rub the balloon on your hair (or sweater).
Lift the middle part of the rope and the two balloons will separate immediately.
Put the cardboard between two balloons, and the electricity on the balloons makes them attracted to the cardboard.
Explanation:
The electricity on one balloon repels the electricity on the other balloon.
The electricity on the two balloons attracts them to the cardboard.
Creation: Can other small experiments be used to illustrate that balloons are charged?
Lovely watermark
Thinking: The beautiful patterns on rice paper are not drawn, but how are they made?
Materials: 1 washbasin, 1-2 rice paper, 1 chopsticks, 1 cotton swab, 1 bottle of ink and water (about half a basin).
Operation:
1. Pour half a basin of water into the washbasin and gently touch the water surface with chopsticks dipped in ink to see the ink on the water surface.
Expand into a circle.
2. Wipe the scalp with a cotton swab for two or three times.
3. Then touch the center of the ink circle and see what happens.
4. Gently cover the calligraphy paper on the water, and then pick it up slowly. What patterns are printed on the paper?
Explanation:
1. When the cotton swab touches, the ink will swell into an irregular circular pattern.
2. A small amount of oil on the scalp rubbed by cotton swabs will affect the mutual pulling force of water molecules.
3. The watermark will look irregular ... >>