Certify Teacher Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

The statement that describes the sun as a medium size star made of gas and located at the center of our solar system is correct. The sun is indeed classified as a medium-sized star, specifically a G-type main-sequence star (G dwarf), primarily made up of hydrogen and helium. This classification highlights its average size and temperature compared to other stars.

Additionally, the sun is at the center of our solar system, and its gravitational pull keeps the planets, including Earth, in orbit around it. While the sun plays an essential role in various Earth processes, such as the water cycle through evaporation and photosynthesis, the direct driving force behind the water cycle is more accurately attributed to the input of solar energy that facilitates evaporation, which leads to cloud formation and precipitation.

This option accurately encapsulates the fundamental characteristics of the sun and its vital role in our solar system. The other statements contain inaccuracies regarding the nature of the sun and its physical dynamics.