Study Questions: Earth's Seasons and Orbit

📚 Quick Study Guide

• 🌍 Earth's Orbit: Earth follows an elliptical path around the Sun. This means its distance from the Sun varies throughout the year.
• 🗓️ Earth's Axial Tilt: Earth is tilted on its axis at approximately 23.5 degrees. This tilt is the primary reason we have seasons.
• ☀️ Seasons: Seasons are caused by the varying amounts of sunlight that different parts of Earth receive as it orbits the Sun.
• 🌡️ Solstices and Equinoxes:
  • ☀️ Summer Solstice: Marks the longest day of the year in the Northern Hemisphere (around June 21st).
  • ❄️ Winter Solstice: Marks the shortest day of the year in the Northern Hemisphere (around December 21st).
  • 🍂 Autumnal Equinox: Day and night are approximately equal in length (around September 22nd).
  • 🌱 Vernal Equinox: Day and night are approximately equal in length (around March 20th).
• 📐 Angle of Incidence: The angle at which sunlight strikes Earth's surface. A more direct angle (closer to 90 degrees) results in more concentrated energy and warmer temperatures.
• ☀️ Perihelion and Aphelion:
  • 💫 Perihelion: The point in Earth's orbit when it is closest to the Sun (around January 3rd).
  • 🌌 Aphelion: The point in Earth's orbit when it is farthest from the Sun (around July 4th).

Practice Quiz

1. Which of the following is the primary cause of Earth's seasons?
   1. A. Changes in Earth's orbital speed
   2. B. Earth's distance from the Sun
   3. C. Earth's axial tilt
   4. D. Variations in solar output
2. During which solstice is the Northern Hemisphere tilted most directly towards the Sun?
   1. A. Winter Solstice
   2. B. Summer Solstice
   3. C. Autumnal Equinox
   4. D. Vernal Equinox
3. What is the approximate tilt of Earth's axis?
   1. A. 13.5 degrees
   2. B. 23.5 degrees
   3. C. 33.5 degrees
   4. D. 43.5 degrees
4. When does the Autumnal Equinox typically occur in the Northern Hemisphere?
   1. A. March 20th
   2. B. June 21st
   3. C. September 22nd
   4. D. December 21st
5. At which point in Earth's orbit is Earth closest to the Sun?
   1. A. Aphelion
   2. B. Perihelion
   3. C. Equinox
   4. D. Solstice
6. Which of the following best describes the shape of Earth's orbit?
   1. A. Perfect Circle
   2. B. Ellipse
   3. C. Square
   4. D. Triangle
7. How does the angle of incidence of sunlight affect temperature?
   1. A. A more direct angle results in cooler temperatures.
   2. B. The angle of incidence has no effect on temperature.
   3. C. A more direct angle results in warmer temperatures.
   4. D. The angle of incidence only affects temperature at the poles.