The only planet currently capable of supporting life
Earth
The sun and all of the bodies that orbit the sun.
Solar System
All objects are attracted to each other by the force of ?
Gravity
Our sun is made mostly of
what is hydrogen
The sun and all of the bodies that orbit the sun.
What is the Solar System?
Model that used Earth as the center,
Geocentric
The smallest Gas giant planet
Neptune
The strength of gravity depends mainly on
mass and distance
Our yellow dwarf star will expand into a ________
Red Giant
The northern hemisphere has this season when tilted away from the sun
winter
The largest (confirmed) planet
Jupiter
The hottest planet
Venus
The tendency of an object to resist a change in its motion
inertia
After our star blows off its red giant shell, it will become a ___________
white dwarf
A body that orbits a another is a ___________
satellite
The planet covered with ferrous oxide
Mars
Rotates 90o on its axis
Uranus
The two main forces that keep Earth and the moon in their orbits
gravity and inertia
What kind of star is our star?
Yellow Dwarf
Earth has seasons because
It's axis is tilted as it moves around the sun
The orbit of a planet or other body around the sun is an ellipse, and the sun is one focus of the ellipse is known as
What is Kepler's First Law?
Inner planets are also called
terrestrial planets
Our current model of the solar system
Heliocentric
When our star finally runs out of fuel it will turn into a __________.
Brown Dwarf
Who first calculated the circumference of the earth.
Eratosthenes
which term best describes the shape of the orbits of planets in our solar system?
Ecliptical
Which of the following has the least moons?
Jupiter, Mars, Saturn, Uranus
Mars
What role did gravity play in forming the sun?
Gravity caused the solar nebula to collapse toward the center, causing the center of thesun to be dense and hot.
This force is a force that makes a body follow a curved path
Centripetal
Which configuration will result in the greatest gravitational force?

1. large masses close together (the larger the mass + the closer the distance = the mos amount oft gravity.
In what order would you put Ceres, Pluto, and Eris from fastest to slowest?
Ceres, Pluto, Eris
A small, irregularly shaped body made of rock or organic material that orbits the sun?
Astroid

Which of these objects is pictured in the diagram?
A comet
What is a shooting star, really?
A meteoroid that burns up in Earth’s atmosphere
Where is the Oort cloud located?
beyond the orbit of Pluto