Across
- 1. The two times in a year when day and night are nearly equal length, occurring when the Sun is directly above the equator.
- 4. The two times in a year when the Sun is at its greatest distance from the equator, resulting in the longest and shortest days of the year.
- 7. The collection of planets and other celestial bodies that orbit the sun. Our solar system includes Earth and seven other planets.
- 10. The time it takes for a planet to complete one full rotation on its axis. For Earth, this is 24 hours.
- 11. The angle at which a planet's axis is inclined from vertical. Earths is about 23.5 degrees and is responsible for the seasons.
- 12. The movement of a planet around the Sun. Earth's revolution takes about 365 days, defining a year.
- 13. an imaginary line around the middle of a planet, equidistant from the poles, dividing it into northern and southern hemispheres.
- 14. The force that attracts a planet towards the Sun, keeping it in orbit. It also holds everything on a planet's surface.
Down
- 2. The path a planet follows as it revolves around the Sun. Orbits can be circular or elliptical.
- 3. Half of a spherical body, like a planet. Earth is divided into the Northern and Southern Hemisphere.
- 5. An imaginary line through the center of a planet around which it rotates. Earth's axis is tilted, which affects the seasons.
- 6. The spinning of a plant on its axis. For Earth, this process takes approximately 24 hours, resulting in day and night.
- 8. An elongated circle or oval shape. Most planetary orbits are elliptical rather than perfect circle.
- 9. Relating to outer space or the universe beyond Earth's atmosphere. Celestial bodies includes planets, stars, and seven other planets.
- 15. The time is takes for a planet to complete one full revolution around the Sun. For Earth, this is approximately 365 .25 days