The Four Seasons: Summer, Autumn, Winter, Spring

The Four Seasons

• Seasons are yearly weather patterns caused by Earth's position and movement around the Sun.
• The four main seasons are Summer, Autumn, Winter, and Spring.
• Each season lasts approximately three months.

Learning Objectives

• Understand what seasons are and why they occur.
• Identify the four seasons and their characteristics.
• Learn how Earth's movement affects the seasons.
• Discover how seasons differ in the Northern and Southern Hemispheres.

What are Seasons?

• Yearly weather patterns occur due to Earth's position and movement around the Sun.
• The main seasons are Summer, Autumn, Winter, and Spring.

Summer: The Hottest Season

• The hottest season of the year.
• Has the most hours of daylight.
• Warm temperatures.
• Lots of outdoor activities.

Autumn: The Cooling Season

• Also known as Fall.
• Weather gets cooler.
• Fewer hours of daylight.
• Leaves change color and fall from trees.

Winter: The Coldest Season

• The coldest season of the year.
• Fewest hours of daylight.
• Snow in many places.
• Many animals hibernate.

Spring: The Warming Season

• Weather starts to warm up.
• Daylight hours increase.
• Plants start to grow and bloom.
• Animals become more active.

Earth's Movement: Rotation and Revolution

• Earth rotates on its axis, causing day and night.
• Earth revolves around the Sun, taking one year.
• Earth's axis is tilted at an angle, causing the seasons.
• The tilt of Earth's axis causes the seasons.

Northern and Southern Hemispheres

• Earth is divided into Northern and Southern Hemispheres.
• Seasons are opposite in each hemisphere.
• When it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere.
• This is due to the tilt of Earth's axis.

How Earth's Tilt Affects Seasons

• Earth's tilt causes one hemisphere to face the Sun more directly, resulting in summer.
• The hemisphere tilted away from the Sun experiences winter.
• Spring and autumn occur when both hemispheres receive similar amounts of sunlight.

Cool Fact: Extreme Seasons at the Poles

• Seasons near the North and South Poles are extreme.
• Summer: several months of constant daylight (Midnight Sun).
• Winter: several months of constant darkness (Polar Night).
• This is due to Earth's tilt and shape.