Gravity is what keeps us from flying off into space. We are always being pulled towards the center of the earth. The moon is also pulled by the earth’s gravity. That’s why it’s always so close to us.
Briefly describes how school in the United States has changed through the years, including such topics as transportation, supplies, and subjects taught.
Briefly describes how toys and games have changed through the years, including such topics as how playgrounds differ and how today's toys relate to those of the past.
Young readers will learn how we send and receive messages using light and sound in this accessible, photo-filled book. Simple text explains different methods of sending messages and shows how light and sound make sending these messages possible. Vibrant photos bring basic science concepts to life and encourage kids to explore light and sound on their own.
Young readers will learn how vibrations make sound that we can hear in this accessible, photo-filled book. Simple text and vibrant photos bring basic science concepts to life and encourage kids to engage with the sounds they hear.