Final answer:
The tilt of Earth's axis causes the seasons to change due to changes in the angle of sunlight and the duration of daylight. This leads to warmer summers in the United States.
Step-by-step explanation:
The tilt of Earth's axis is responsible for causing the seasons to change. There are two main ways that this happens:
- Firstly, the tilt of the axis causes the angle at which sunlight strikes the Earth to change throughout the year. During the summer in the United States, the Northern Hemisphere is tilted towards the Sun, which means the sunlight is more direct and concentrated in a smaller area, leading to hotter temperatures.
- Secondly, the tilt of the axis also affects the duration of daylight. In the summer, the Northern Hemisphere is tilted towards the Sun, which means the days are longer. This allows for more time for the Sun's rays to heat up the Earth, leading to warmer temperatures.