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.