A science experiment material simple, urgent, urgent 30 points

The time it took for the apple to land from the second floor.

The simple scientific experiments include experiencing the weather, zero-cost fountains, green plant huts, shelled eggs, wonderful kaleidoscopes, plastic bags, small volcanoes, water absorption tests, fire words, etc. For example, the materials are lemon, white paper, and candles, and the lemon juice is used to write or draw on the white paper, and then the paper is dried, and the white paper is baked with a candle, and the traces left by the lemon appear again. The simple scientific experiments include experiencing the weather, zero-cost fountains, green plant huts, shelled eggs, wonderful kaleidoscopes, plastic bags, small volcanoes, water absorption tests, fire words, etc.

For example, the materials are lemon, white paper, and candles, and the lemon juice is used to write or draw on the white paper, and then the paper is dried, and the white paper is baked with a candle, and the traces left by the lemon appear again.

- -I'll recommend you one that I've done myself

What you need to prepare is:

A wire, a few balloons, a piece of sandpaper, lubricating a few thin wiresSteps: Use sandpaper to sharpen the wire.

Lubricate the wire.

Blow up the balloon and tie the balloon mouth with a thin wire.

Carefully thread the wire through the front end of the balloon and come out of the tail end to thread a few more balloons.

Result: The balloon won't burst! ~~

It's a fun game.

The principle should be that the pressure on the front and back sections of the balloon is relatively small, so after the steel wire is pierced, the surface of the balloon will not suddenly break, but will be sticky, and the internal air will not flow, so the internal and external atmospheric pressure will still remain in a balanced state and will not break.

A piece of paper, a lighter, an empty bottle, a bottle of water.

After lighting the paper, put it in an empty bottle, and self-extinguish, it's easy enough.

General combustion conditions, combustibles, ignition points, oxygen.

"Ouch! "I turned off my computer and walked out to find a couple of sponges and boxes on the dining table. Mom came out and said:

Use these things for this little experiment today! I looked at the sponges and the boxes and asked, "Can you do this little experiment with four sponges and two boxes?"

It doesn't matter if it doesn't work, you just do it first, and try not to break the eggs! Mom replied. This is a small experiment that the teacher arranged for us to do, dropping the egg from the fourth floor and trying to keep it from breaking.

I thought to myself, what can I do with such a small thing? Do you wrap the eggs in a sponge and throw them down? Or put the eggs in the box and throw them down?

Or do you put an egg wrapped in a sponge and throw it in a box? This is a question that is difficult for me to answer. I gestured with my hands on the table, thinking with my heart in my head, and suddenly, I had a good idea - first wrap the eggs tightly with the largest sponge, then put a sponge on the bottom of the bubblegum box, then stuff the sponge with the egg into the bubblegum box, then put a sponge on the bottom of the metronome box, then stuff the bubblegum box in, then put a sponge on the top, and finally put the box in a plastic bag, and that's it.

After thinking of a way, I immediately started to act, and when I was done, I thought to myself: I will definitely be able to do it this time. So I went to the fourth floor with my mother.

I first looked at the position, and then I threw it away. I saw the thing bounce on the branch, and then on the hedge, and then it fell. I hurried downstairs, picked up the plastic bag, and thought:

It's definitely not going to rot this time. So he ran upstairs and asked his mother, "Do you think it's rotten?"

I followed up.

When I got home, I couldn't wait to open the box and find that the egg was still a small round ball that was cold to the touch. Mom also rushed back, came to the kitchen, and asked while panting, "How is the egg, is it broken or not?"

I was ecstatic and told her, "Intact!" Mom suddenly had a satisfied smile on her face.

In order to challenge my ingenuity, I decided to compete twice. The first time I packed it up like I had done before, and then I threw it down from the sixth floor, and I thought to myself: don't break it this time!

Otherwise, my hope will be shattered. But when I opened it outside, I saw a whole egg that was still steaming. This time I succeeded again.

I think it's broken! "I had a sense of fear in my heart. But hearing is false, and seeing is believing?

I picked up the egg, and as soon as I opened it, wow! I cheered with joy.

From this experiment, I learned that you have to concentrate on one thing to succeed.

a. Aluminum cans will gradually corrode.

b The reaction that occurs on the carbon particles and the charcoal rod is: O2+4E = 2O2 c The carbon rod should be connected to the negative electrode of the toy motor.

d The mass of the carbon rod and carbon particles will be reduced after the battery works for a period of time.

The topic is this, choose A

Use potatoes as batteries, taught in textbooks.

Handwriting recreates magic.

Write words on a piece of white paper with colorless phenolphthalein and let it dry. Then take it to the classroom, spray white vinegar as water on it, and the words will appear.

Science experiments.

1.If you insert a chopstick into a cup containing rice and lift the chopsticks up, will the chopsticks lift the rice and the cup?

The divine power of chopsticks.

Think: If you insert a chopstick into a cup containing rice and lift it up, will the chopsticks lift the rice and the cup?

Ingredients: a plastic cup, a rice cup, a bamboo chopsticks.

Operation: 1. Pour rice into a plastic cup.

2. Press the rice in the cup with your hand.

3. Hold down the rice with your hand and insert the chopsticks between your fingers.

4. Gently lift the chopsticks with your hand, and the cup and rice are lifted together.

Explanation: Due to the extrusion between the rice grains in the cup, the air in the cup is squeezed out, and the pressure outside the cup is greater than the pressure in the cup, so that the chopsticks and the rice grains are tightly combined, so the chopsticks can lift the cup of rice.

1.Put warm boiled water into the bottle and touch the bottle with your hand to see if it feels hot.

2.Pour out the warm water from the bottle and quickly close the lid tightly.

3.Watch as the bottle slowly deflats.

Explanation:1Heat the air in the bottle so that the pressure is reduced.

2.Since the air outside the bottle is more pressurized than the air inside the bottle, the bottle is deflated.

Creation: If the pressure of the gas in the bottle is greater than the pressure of the air outside the bottle, what will the bottle become?

Science experiments? It seems that there is no experiment that is not a scientific experiment, and there is no experiment that has no scientific reason, and the landlord expresses that it needs to be improved.

Science experiment: Buy a large balloon, blow one in the atmosphere, and find a way to measure the mass of the air in the balloon.

Experimental method design:

Equipment used in the experiment:

Procedure: (Write step by step):

Record of Experimental Results:

Materials: Xiaoice cubes, pebbles, test tubes, test tube clips, candles, matches or lighters.

Procedure: Put the Xiaoice cube into the test tube, press it with a small stone, light the candle, and put the test tube on the fire to burn.

Result: After a while, the water above the test tube boiled, and the ice had not yet melted.

Principle; When the tube is heated, the hot water rises and the cold water falls, so until the water above the tube boils, the water below has not had time to melt the ice.

Method: Calculated according to mass.

Equipment: Large glassware with graduation marks, glass rods.

Process: Blow the balloon into the appropriate amount of gas, fill the large glassware with the appropriate amount of water, and mark the table at the scale mark of the water as V1; Tie the balloon to keep it airtight, press the balloon completely into the water of the glassware with a glass rod, and mark the current liquid level position as V2.

Result: The volume of the balloon is denoted as v2-v1 The mass of the balloon is calculated from mass = density * volume.

Phenomenon: The three small holes A, B, and C all have water injection, and the lower the hole, the greater the distance of the sensitive water.

Conclusion: The pressure of water on the wall of the vessel is related to the depth, the deeper the water, the greater the pressure, and the shallower the pressure, the smaller the pressure.

Phenomenon: The further up the hole, the closer the water jet is.

Conclusion: The internal pressure of the liquid is related to the depth, and the deeper the pressure, the greater the pressure.