What causes Earth's seasons?

Earth's seasons are caused by the tilt of the Earth's axis relative to its orbit around the Sun. Here's a breakdown of the key components:

Step 1: Define the Problem

Identify what causes the change in seasons on Earth.

Step 2: Break Down the Problem

1. Earth's Tilt: The Earth is tilted at an angle of approximately 23.5 degrees relative to its orbital plane.
2. Orbit Around the Sun: As the Earth orbits the Sun, different parts of the Earth receive varying amounts of sunlight throughout the year.

Step 3: Apply Relevant Concepts

• Axial Tilt: The tilt causes different hemispheres to receive more direct sunlight at different times of the year.
• Solar Energy Distribution: When the Northern Hemisphere is tilted toward the Sun, it experiences summer due to more direct sunlight and longer days. Conversely, when it is tilted away, it experiences winter.

Step 4: Analysis, Verify and Summarize

• Seasonal Changes: The combination of Earth's axial tilt and its orbit around the Sun leads to the cyclical pattern of seasons.
• Equinoxes and Solstices: These are key points in the Earth's orbit that mark the transition between seasons.

Final Answer

Earth's seasons are caused by the tilt of its axis, which leads to varying angles and durations of sunlight received by different parts of the Earth as it orbits the Sun.