In the textbook of Beijing Normal University, which unit is the fourth grade science "Water can dissolve some substances"?

1, the weather we care about 1, some substances that can be dissolved by water.

2. weather calendar 2. How does a substance dissolve in water?

3. Temperature and air temperature 3. Dissolution between liquids

4. Wind direction and speed. Solubility of different substances in water

5. Measurement of precipitation. Fast and slow dissolution

6. Cloud observation. How many grams of salt can 100 ml dissolve?

7. Summarize our weather observation. Method of separating salt from water.

Sound, our bodies.

1, listening to sound 1, body structure

2. How is the sound generated? 2. Bones, joints and muscles

3. Changes in sound. What happens during exercise (1)

4. Explore the pitch change of the ruler. 4. What happens when you exercise (2)

5, the spread of sound 5, food travel in the body

6. How do we hear voices? Changes of food in oral cavity

7. Protect our hearing. Cooperative human organs