Examples of science lessons for the fourth grade of primary school, what are the science experiments

The fourth-grade popular science books are as follows:

1. "Insects": He Jian is an excellent entomological book and literary work, with a great amount of knowledge and vivid descriptions, and the author's "insects" are as colorful as people, and they live with taste, which makes people have to sigh the mystery of nature. This is the masterpiece of Fabre, an outstanding French entomologist and writer, and it is also an immortal work.

2. "77 2 Science Games That Fascinate Children": The author is Michio Goto, Japan's "experimental uncle". There are 156 fun science games in the book, allowing children to feel the magic of science in hands-on games, and Chunkuan cultivates their imagination and creativity.

At the same time, it is also a parent-child popular science book, where parents and children do experiments together and have fun.

3. "Seaton Wildlife Stories": The author Ernest Thompson Seaton wrote all the animals he saw into the book, leading children to approach the all-encompassing animal world. Not only can you broaden your horizons and enlighten your wisdom, but you can also feel the colorful world and stimulate your interest in natural science.

4. "The Most Beautiful Science Popularization Four Seasons Clock Series": The author is Una Jacob of Germany. The complete set of books describes the growth process of plants and animals throughout the year in the image of the best and richest, revealing many secrets of animals and plants.

5. "52 Experiments to Ignite Creativity": A very interesting experimental book, which can cultivate children's interest, life-oriented, operable, and interesting. The author is Ulrik Berg from Germany.

6. "101 Magical Experiments": Written by Antia Sean and Ike Funge of Germany, it is a book that allows children to think about problems by hand. Let children solve one mystery after another in hands-on games, and engage children to explore the unknown world.

1.Raw dumplings sink and cooked dumplings float because hot air is lighter than cold air.

2.Salt is added to make potatoes and eggs float, and salt is added to increase the density of the water.

3.Parachutes made of plastic film can stay in the air for a long time because of the updrafts on the side of tall buildings.

4.We can see the blue sky because the blue light in the sunlight is the most penetrating.

5.A magnifying glass can ignite paper because the convex lens can focus.

6.The compass can guide because the south side is the north pole of the geomagnetic field.

7.Chains are wrapped around the wheels of snow driving to increase friction.

8.There are fewer and fewer stars at night because the universe is still expanding.

9.Air conditioning, car exhaust, concrete floors, and a large number of houses are the main culprits of the greenhouse effect.

10.Plants have the functions of producing oxygen, absorbing dust and noise, reducing the surrounding temperature, resisting wind and sand, and fixing soil and water, so a variety of trees and grasses should be planted.

The fourth-grade science experiments have the following:

1. How substances are dissolved in water.

2. Dissolution between liquids.

3. The solubility of different substances in the water.

4. The method of separating salt and water.

5. How is the sound produced by the state.

6. Measurement of precipitation.

7. Explore the pitch changes of the ruler.

8. The propagation method of sound.

9. Analysis of fast and slow factors of dissolution.