1, Rainbow Cup: Pour syrup of different colors into the cup, and then gently stir it with a straw to observe how the colors mix together to form a rainbow.
2. Balloon rocket: Tie an inflated balloon to a thin thread, then fix the thin thread on a bracket, quickly release the balloon and observe how it flies out like a rocket.
3. Float on the water: Fill a plastic bottle with water, then put a small paper boat on it and observe how the paper boat floats on the water.
4. Magic milk: Pour the milk into a shallow dish, add a few drops of detergent, then dip a cotton swab into a small amount of detergent and gently touch the surface of the milk to observe how the foam is generated quickly.
5. Magic flowers: Put some white flowers into a glass filled with water, add a few drops of food pigment and a drop of detergent, and observe how the flowers change color to produce a beautiful petal effect.
6. Homemade volcano: spread a thin layer of soil or sand on the tray, then pile some pebbles and clods on it, and finally light the pebbles with candles to observe the effect of volcanic eruption.
7. Floating needle on water: Place a sewing needle gently on the water and observe how it floats on the water.
8. Magic ice cube: put an ice cube into a transparent glass, add a few drops of food pigments of different colors, then immerse a cotton swab in a small amount of detergent, gently touch the surface of the ice cube, and observe how the pattern on the ice cube is gradually formed.
9. Eggs floating on the water: put an egg in a bowl filled with water, add a few drops of detergent, then dip a cotton swab in a small amount of detergent, gently touch the surface of the egg and observe how the egg floats on the water.
10, Magic Balloon: Tie an inflated balloon to a thin thread, then fix the thin thread on a bracket, quickly release the balloon, and observe how it descends slowly like a parachute.
Matters needing attention in doing small experiments
1, safety first. Before the experiment, it is necessary to understand the possible risk factors in the experiment and take corresponding safety measures, such as wearing gloves and goggles. We should make enough preparations. Before the start of the experiment, you should carefully read the experimental steps and precautions, and prepare the required materials and equipment.
2. Pay attention to the experimental environment. Choose a quiet, clean and well-ventilated place for the experiment to avoid interference and danger. Operate carefully. During the experiment, pay attention to avoid accidents. If you are not sure how to operate, you can ask your teacher or parents.
3. Record the experimental process and results. During the experiment, we should carefully observe and record the experimental phenomena and results for subsequent analysis and summary. Cleaning work should be done well. After the experiment, it is necessary to clean up the experimental equipment and site in time and keep it clean and tidy.
4. Don't try unproven experimental methods at will. Some experimental methods may be risky and need professional verification and guidance. Comply with laboratory regulations. If you do experiments in the laboratory, you should abide by the regulations and requirements of the laboratory. If you don't litter, you are not allowed to enter the laboratory without permission.