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| 1. |
How does day and night happen? |
| Answer» The Earth is a sphere, or ball, which spins round and round as it travels around the sun. One side of the Earth faces the sun, while the other side faces away into space. The side facing the sun is bathed in light and heat—we call this daytime. The side facing away is cooler and darker, and experiences night. Because the Earth is constantly spinning, the line between day and night is always moving around the planet. A day on Earth lasts 24 hours—that is how long it takes for the planet to spin around once. | |