Longest Line of Latitude: Lines of latitude are imaginary horizontal lines that circle the Earth, helping measure how far north or south a location is from the Equator. These lines play a crucial role ...

Cardboard piece, 20-by-25 centimeters or larger (It should be either thick cardboard or two layers of regular cardboard so the pushpins do not stick through.) Two assistants (The activity can be done ...

Ever stood on the coastline, gazing out over the horizon, and wondered what's on the other side? Pondered where you'd end up if you could fly straight ahead until you hit land? Ever stood on the ...