Gas Giants
Jupiter, Saturn, Uranus, and Neptune
What are the four Gas Giants?
Mercury, Venus, Earth, and Mars
What are the four terrestrial planets?
a curved path followed by a satellite as it revolves around an object
What is an orbit?
the force that causes objects with mass to attract one another
What is gravity?
a celestial body that revolves around a planet
What is a moon?
this planet is the furthest from the Sun
What is Neptune?
this planet is closest to the Sun
What is Mercury?
this is the shape of the planets' orbit
What is an ellipse (or elliptical path)?
What causes gravitational attraction to strengthen?
a large celestial body that revolves around a star in a solar system
What is a planet?
this planet is the largest in the solar system and has the most moons
like Earth, this planet has dried-up riverbeds, lakebeds and mineral deposits
What is Mars?
theory in which planets orbit the Earth (incorrect)
What is the Geocentric Theory?
increasing distance between objects and decreasing mass has this effect on gravitational attraction
What causes gravitational attraction to weaken?
a star and the group of planets and other celestial bodies that are held by its gravitational attraction and revolve around it
solar system
this planet is tipped on its side- the likely result of a collision during its formation
What is Uranus?
these two planets have no moons
What are Mercury and Venus?
theory in which planets orbit the Sun
What is the Heliocentric Theory?
this object governs the movement of celestial objects in our solar system
What is the Sun?
large and small rocks or metallic masses orbiting the sun; made up of materials similar to those that formed the planets
What are asteroids?
this planet rotates backwards (retrograde rotation)
What is Uranus?
this planet rotates backwards (retrograde rotation)
What is Venus?
this planet takes 165 Earth years to complete its orbit around the Sun
What is Neptune?
basketball, tennis ball, and marble (respectively)
What are the Sun, planets, and moons?
1) The object is in orbit around the Sun.
2) The object has a nearly spherical shape.
3) The object has cleared the neighborhood around its orbit of smaller objects.
What are the three criteria that define a planet?