The material world is rich in content, mainly involving the following aspects: light, shadow, color, fire, heat, temperature, electricity, magnetism, sound, force and movement. Light, shadow and color. Light is a common phenomenon in nature, which is closely related to the growth and life of human beings and everything on earth. Shadows related to light often attract children's attention and exploration. Besides, there are rich colors and their wonderful changes, which are children's favorites.
Know all kinds of natural and artificial light sources, such as the sun, the moon, lightning, individual creatures (fireflies) and electric lights, flashlights, candles and so on. , and understand their differences.
We have a preliminary understanding of the close relationship between light and human life, and the importance of light to human life. By fiddling with various optical instruments (such as prisms, flat mirrors, convex lenses and concave lenses) and articles and toys in daily life, such as kaleidoscope and telescope, we can explore, feel and understand simple optical phenomena, such as reflection and refraction.
Explore the relationship between light and shadow through experiments and games, and feel and understand the shadow formed after the light is blocked. Such as the game of stepping on shadows in the sun, the game of indoor lighting and objects. The phenomenon of color and its change, such as the superposition of pigments and its color change, is explored through experiments.