Across
- 5. An ancient model of the solar system which we know today is not correct. It puts earth at the center of the solar system and says that everything orbits around the earth.
- 8. A model of the solar system which puts the Sun at the center and says that the plants orbit around the sun.
- 9. An ancient tool used to tell time during the day. Part of it casts a shadow onto a flat surface marked in hours. It works due to Earth’s rotation.
- 10. A year with one additional day added. Our normal calendar has 365 days so every 4 years we have a leap year which adds an extra day.
- 11. is the path an object follows as it moves around another one. Earth moves in a circle around the sun once every 365.25 days. We call that path Earth’s orbit.
- 12. is made up of the sun, 8 planets and their moons. The planets all orbit around the sun and moons orbit around a planet.
Down
- 1. The action of the earth turning or spinning around its center.
- 2. A group of stars that form a recognizable shape such as the big dipper.
- 3. A tool that provides evidence that the earth is rotating. It is made of a heavy weight hanging from a long wire which swings back and forth. The direction of the swinging ball appears to change due to Earth’s rotation.
- 4. A dark shape made when an object blocks light. When you stand outside, your body blocks the sunlight.
- 6. The apparent shift of position of some stars through the year.
- 7. An area on Earth that has a specific time that all people living there can set their clocks to. There are 24 different zones.