3. New words
• Solar system: is made up of the Sun, eight
planets, their moons and other objects that
revolve around the Sun, which is the center of
the solar system.
• A planet: is a large, ball-shaped body that
revolves or travels around the Sun.
• Orbit: the path an object takes as it revolves
around the Sun.
4. Sun
• Is a ball of hot glowing gasses called plasma.
• It is a star, and looks bigger and brighter
because it is much closer to the Earth than
other stars.
• All the planets travel in an orbit that is a slight
oval shape.
• The strong pull of the Sun’s gravity holds the
planets in their orbits.
7. • Asteroid: is a small chunk of rock that orbits
the Sun.
• Thousands of asteroids are found in the
asteroid belt between Mars and Jupiter, which
separates the inner planets and outer planets.