Ten simple scientific experiments?

Ingredients: a boiled egg, a milk bottle, the bottle mouth is smaller than the egg, alcohol cotton balls, and of course candles are also acceptable.

First light the alcohol cotton ball, then put it in the bottle, and quickly put the egg on the bottle to see if the egg has been sucked into the glass bottle. Teacher Wang Hao suggested that parents can do it with their children, using both brains and hands.

2. Non-fragile plastic bags

Materials: plastic bag, pencil, water.

Use garbage bags at home, of course, it is better to use thicker fresh-keeping bags.

3. Color-changing flowers

Materials: Use light-colored flowers, preferably white flowers such as carnations, food coloring, water and cups.

The method is simple. Pour water into the cup, then drop a few drops of pigment, stir and add flowers, and observe the color of flowers after a while.

4. Electrostatic phenomenon

Materials: balloons, small pieces of paper.

Rub the balloon with clothes and other things to make it generate static electricity. Put a small piece of paper near the balloon, and you will see the balloon suck it up.

5. balloons that ignore each other

Material: two balloons, dry flannel (or wool) and thin thread.

Blow up two balloons, tie them to prevent air leakage, and tie them with thin thread. Rub the dry flannel (down jacket) on two balloons, and then lift the thread, and you will see that the two balloons are separated. The electricity brought by friction is either positive or negative. Because two balloons are rubbed by flannel and have the same charge, they will repel each other and naturally separate.

Step 6 fish for ice

Materials: ice, rope, salt.

Freeze an ice cube in the refrigerator first, then fish it with a line, sprinkle some salt on the ice cube, hold the line 10 second, try again, and you can hang up.

7. Pinecones and climate

Ingredients: water, dried pine cones.

In order to spread the seeds better, the pinecones will close when the rainy season comes. Only when the rainy season is over and the weather is dry and the spores in the pine cone can fly a longer distance will it open. Through this experiment, we can observe the changes of pine cones in different environments.

8. Use a homemade parachute to observe the air resistance.

Materials: plastic bags, ropes, small articles.

A small object tied to a plastic bag with a rope was thrown into the air and became an airdrop.

9. Mysteriously extinguished candles

Materials: Coke, candles.

When the newly opened coke is placed flat in contact with the lighted candle, the candle will soon go out and the carbon dioxide in the bottle can be poured out. If the density of carbon dioxide is greater than that of air, the candle will go out.

10, solid to liquid conversion

Materials: colored crayons, hair dryers.

It is a good way to make a rainbow waterfall by arranging colored crayons in a row and fixing them on cardboard and heating them with a hair dryer. If there are artistic cells, it can be arranged more interestingly, and finally it is a work of art.