Across
- 2. The divisions of the year marked by changes in weather, ecology, and daylight, resulting from Earth's tilt and orbit.
- 8. The North Star, located nearly directly above Earth's North Pole.
- 10. The day with the shortest period of daylight, marking the beginning of winter.
- 12. The state when ocean water reaches its highest level at a specific location.
- 15. The day with the longest period of daylight, marking the beginning of summer.
- 17. An event in which the moon passes between the Earth and the sun, blocking the sun's light.
- 18. The day in spring when day and night are of approximately equal length, marking the start of spring.
- 19. The amount of solar radiation reaching a given area of Earth's surface.
- 20. The spinning of an object around its axis.
- 21. Earth's natural satellite that orbits the planet and influences tides.
Down
- 1. A tide with the greatest difference between high and low tides, occurring when the sun, moon, and Earth are aligned.
- 3. A tide with the least difference between high and low tides, occurring when the sun and moon are at right angles to each other.
- 4. An event in which the Earth passes between the sun and the moon, casting a shadow on the moon.
- 5. The day in autumn when day and night are of approximately equal length, marking the start of fall.
- 6. The state when ocean water is at its lowest level at a specific location.
- 7. A repeating sequence, such as the changing phases of the moon or seasons.
- 9. The imaginary line around which a planet rotates.
- 11. The angle between the direction of an object in the sky and true north, measured along the horizon.
- 13. The point directly overhead in the sky.
- 14. The movement of an object around another object in a path or orbit.
- 16. The star at the center of our solar system that provides light and heat to Earth.