Which of the following is a key characteristic of all planets?(1 point) Responses They are made up of mostly ice and dust They are made up of mostly ice and dust They orbit the sun and shine by reflecting light They orbit the sun and shine by reflecting light They are small rocky objects the burn upon entering Earth's atmosphere They are small rocky objects the burn upon entering Earth's atmosphere They have a tail that extends as it moves through space
The key characteristic of all planets is that they orbit the sun and shine by reflecting light.
Which of the following best describes the role of gravity in the formation of planets, stars, and solar systems?(1 point) Responses Gravity causes the expansion of the universe. Gravity causes the expansion of the universe. Gravity prevents the formation of stars and planets. Gravity prevents the formation of stars and planets. Gravity brings together matter, leading to the formation of stars, planets, and solar systems. Gravity brings together matter, leading to the formation of stars, planets, and solar systems. Gravity is not involved in the formation of stars and planets.
