Earth's Orbit and Rotation

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Across
  1. 4. A tool that provides evidence that the earth is rotating.
  2. 5. 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.
  3. 8. A model of the solar system which puts the Sun at the center and says that the plants orbit around the sun.
  4. 9. A year with one additional day added every 4 years because one orbit of the earth around the sun is 365.25 days. Our normal calendar has 365 days so every 4 years we add an extra day.
  5. 10. the sun, 8 planets and their moons
  6. 12. The action of the earth turning or spinning around its center.
Down
  1. 1. The apparent shift of position of some stars through the year.
  2. 2. A group of stars that form a recognizable shape such as the big dipper.
  3. 3. 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.
  4. 6. An area on Earth that has a specific time that all people living there can set their clocks to.
  5. 7. the path an object follows as it moves around another one.
  6. 11. A dark shape made when an object blocks light.