Puzzle 35: Seasons

The Northern Hemisphere and Southern Hemisphere experience opposite seasons throughout the year.

For example: When it's summer in Europe and North America, it's winter in Australia, and vice versa.

The seasons have nothing to do with how close we are to the sun, but are caused by the Earth's tilt. In summer, the part of the Earth you are on is tilted towards the sun so the sunlight is more direct and warms the earth and atmosphere more. In winter, it's tilted away so that the same amount of sunlight is spread over a larger area, and this means it cannot warm things up as much.

NASA: What Causes the Seasons?