Scientific production in the third grade of primary school

The introduction of scientific production in the third grade of primary school is as follows:

1, water dyeing: add water to a cup, drop food dyes of different colors, and observe the result of color matching.

2. Plant growth experiment: put beans or rapeseed in a wet tissue and put it in a bright place to observe the process of germination and growth.

3. Do airplane experiments with paper: Fold out paper airplanes with different shapes with ordinary paper, test the flight effects of airplanes with different shapes, and calculate the flight distance.

4. Energy conversion experiment: Using straws and balloons, the air energy in the balloon is converted into kinetic energy, which makes paper cups or dolls move.

5. Cause experiment: Make gypsum sculpture, observe the evaporation process of water in gypsum, and understand the causes of gypsum hardening.

6. Simulated volcano experiment: A small plastic bottle or porcelain plate is used as a "crater", and substances such as baking soda and vinegar are added to make a chemical reaction in the crater to simulate the process of volcanic eruption.

7. Physical experiment: Make a simple track, put the car on the track, and observe the process of its up-and-down movement and the changes of speed and acceleration.

8. Melting experiment: compare the melting points of different substances, such as comparing the melting speed and temperature of crayons, butter, chocolate and other substances at different temperatures.

9. Elasticity experiment: Experiment with rubber bands, feathers, springs and other materials, observe their elasticity and deformation, and understand the basic principles of material mechanics.

10. Wind speed measurement experiment: make a small windmill and use it to measure the speed change under different wind speeds.

1 1. gas diffusion experiment: put small salt particles or spices into a cup and observe their diffusion into the cup over time.

12, weather observation experiment: make a simple barometer with glass bottles, rubber bands and other materials, and predict the weather changes by observing the barometer.

13. Sound wave experiment: Make a simple buzzer with cans, rubber bands and other materials, and observe the sound wave propagation in it.

14. Gravity experiment: Using materials such as balance or scale, compare the influence of different objects' weight and center of gravity position on the balance.

15. seawater desalination experiment: put salt water in a basin, put a glass in the center of the basin, cover the basin with plastic film, and pile a little ice near the glass. After a period of time, fresh water will gather in the glass, and the original salt water will become more salty.