Activity 1: Identify the words being referred to. Choose your answer from the box. aphelion rotation perihelion revolution axis Earth summer solstice winter spring autumnal equinox seasons 1. It is the movement of object on its axis. 2. It is the movement of an object around the bigger object. 3. It revolves around the sun once a year. 4. Earth's orbit closest to the sun. 5. Earth's orbit farthest to the sun. 6. Are short periods of climatic changes caused by the changes in the amount of solar radiation an area receives. 7. It is when the North Pole tilts directly toward the sun. 8. It arrives with the winter solstice on December 22. 9. It happens on September 23 when night-time and daytime are equal. 10. It is the signal of the start of a new season.​