Science Quiz! The Solar System

The sun is the center of the solar system. It is a star that emits light and heat, and it is the largest celestial body in our solar system. The planets, including Earth, revolve around the sun due to its gravitational pull. The sun provides energy for life on Earth and plays a crucial role in the Earth's climate and weather patterns.

The objects in the solar system stay in orbit due to the sun's gravity. Gravity is a force that attracts objects towards each other, and the sun's massive size creates a strong gravitational pull. This gravitational force keeps the planets, moons, and other objects in orbit around the sun. The strength of the sun's gravity decreases with distance, so objects closer to the sun experience a stronger gravitational pull and orbit at higher speeds. This balance between the gravitational pull of the sun and the forward motion of the objects results in stable orbits.

The tilting of the Earth's axis causes seasons. As the Earth orbits the Sun, the axis remains tilted at an angle of about 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, resulting in the changing seasons. When a hemisphere is tilted towards the Sun, it experiences summer, while the hemisphere tilted away from the Sun experiences winter. The tilt also affects the length of daylight hours, with longer days in summer and shorter days in winter. The changing seasons are a direct result of the Earth's axial tilt.

The solar system is a system comprising of the sun and all the objects that orbit around it. This includes planets, moons, asteroids, comets, and other celestial bodies. The sun is at the center of the solar system and exerts gravitational force on all the objects, keeping them in their respective orbits. Therefore, the best description of the solar system is that it consists of the sun and objects that orbit around it.

The correct answer is "rocky on the surface". This is because inner planets, also known as terrestrial planets, are composed mainly of rock and metal. These planets, including Mercury, Venus, Earth, and Mars, have solid surfaces and are closer to the sun compared to the outer gas giants. They have a rocky composition due to their formation process and proximity to the sun, which prevented the accumulation of large amounts of gases.