Traditional Culture Encyclopedia - Weather forecast - 20 17 what does the first volume of the science textbook for the fourth grade of primary school include?
20 17 what does the first volume of the science textbook for the fourth grade of primary school include?
Water can dissolve some substances.
Lesson 2 How does water dissolve matter?
Lesson 3 Dissolution between liquids
Lesson 4 Solubility of Different Substances in Water
Lesson 5 Fast and Slow Dissolution
Lesson 6 How much salt can a glass of water dissolve?
Lesson 7 the method of separating salt from water
The second chapter, sound.
Listen to the sound
Lesson 2 How does sound come about?
Lesson 3 the change of sound
Lesson 4 Explore the Pitch Change of Ruler
Lesson 5 How does sound spread?
Lesson 6 How do we hear the sound?
Protect our hearing.
Chapter III, Weather
We care about the weather.
Lesson 2 Weather Calendar
Lesson 3 temperature and air temperature
Lesson 4 Wind Direction and Wind Speed
Lesson 5 Measurement of Rainfall
Lesson 6 Cloud Observation
Lesson 7 summarizes our weather observation.
Chapter IV Our Bodies
Body structure
Lesson 2 bones, joints and muscles
Lesson 3 What happens when you jump (1)
Lesson 4 What happens when you jump (2)
Lesson 5 Food Travel in the Body
Lesson 6 Changes of Oral Cavity
Lesson 7 Take care of our bodies.
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