Solar System

Grade 5 · Science · Flashcards

Practice key vocabulary and facts about the planets, sun, and other objects in our solar system.

Flashcards

Solar System: The Sun and all the objects bound to it by gravity, including planets, moons, asteroids, and comets.
Sun: The star at the center of our solar system; provides light and heat energy to all planets.
Mercury: The smallest planet and closest to the Sun; has extreme temperature swings and no atmosphere.
Venus: The second planet from the Sun; the hottest planet due to its thick carbon dioxide atmosphere.
Earth: The third planet from the Sun; the only known planet with liquid water and life.
Mars: The fourth planet; called the 'Red Planet' because of iron oxide (rust) on its surface.
Jupiter: The fifth and largest planet; a gas giant with the Great Red Spot, a giant storm.
Saturn: The sixth planet; known for its spectacular rings made of ice and rock.
Uranus: The seventh planet; an ice giant that rotates on its side.
Neptune: The eighth and farthest planet from the Sun; an ice giant with the strongest winds in the solar system.
Asteroid Belt: A region between Mars and Jupiter containing millions of rocky objects called asteroids.
Orbit: The curved path an object takes around another object due to gravity, like a planet around the Sun.
Moon: A natural satellite that orbits a planet; Earth has one moon.