Explore how sound changes as it travels through various materials. Make a telephone using cups and string to explore how sound travels. Design ways of changing the sound of their voices. Use different objects to talk through and explain why each object made the resulting change in sound. The Sky Above Us Day, night, and seasonal changes affect human activity.
Students are interested in and aware of the sun, moon, planets, stars, and other objects in the sky.
Through demonstrations and models, they distinguish the unique features of the Earth and develop an awareness of how day, night, and the seasons are caused by the Earth's movement around the sun. Activities Role play the positions of the sun, moon, and Earth. Use a globe, a flashlight, and a small ball to demonstrate the day and night positions of the Earth, sun, and moon. Use flashlights and graph paper, to compare the amount of light that covers a surface that is flat and a surface that is slanted. Explain how the Earth's seasons are caused by the differences in the angle of the sun's rays striking the Earth.