1. Which of these things happen because Earth spins fully on its axis every 24 hours? It gets colder in the winter than in the summer. Shadows get longer and shorter throughout the day. Different parts of the world experience different climates. Stars appear very small in the sky even though they are really very large.

The phenomenon that happens because Earth spins fully on its axis every 24 hours is: **Shadows get longer and shorter throughout the day.** This is due to the rotation of the Earth, which causes the position of the Sun in the sky to change, resulting in varying lengths and angles of shadows throughout the day. The other options are influenced by different factors: - The temperature differences between winter and summer are primarily due to the tilt of the Earth's axis, not its rotation. - Different parts of the world experiencing different climates is also related to the tilt of the Earth's axis and its orbit around the Sun. - Stars appearing small in the sky is due to their vast distances from Earth, not directly related to the Earth's rotation.