Fast Facts
What is gravity?
A pulling force that draws objects toward the center of a planet or other celestial body.
According to Newton's first law of motion: unless acted on by an unbalanced force, an object in motion tends to stay in motion and an object at rest tends to......what?
stay at rest
is the path that an object follows as it travels around another body in space.
What object in our solar system governs the movement of all other objects?
The Sun
As the mass of an object increases, so does its .
gravitational pull
What does the force of gravity depend on?
A. Surface Area
B. Mass
C. Weight
D. Density
B. Mass
what would happen if we lost all gravity?
everything would float away into space
True or False: According to Newton's laws of motion, when one object exerts a force on another object, the second object exerts an equal force on the first object in the opposite direction.
True.
This force pulled gas and dust together to form the Sun and planets.
Gravity!
As the distance between celestial objects increase, their gravitational pull will ________.
Decrease
Jupiter has more mass than Earth...would you weigh more or less on Jupiter than on Earth?
More
These are large rocks in space.
Asteroids
Which planet has the most gravitational pull and therefore has the most moons in it's orbit?
Jupiter
Most planetary orbits are shaped like this, not perfect circles.
Ellipses
What is an area of such immense gravity that nothing -- not even light -- can escape from it?
A black hole
_____ galaxy types have a weak gravitational pull and typically contain young stars or Nebulas.
Irregular
Which planet has the shortest year?
Mercury
Who created the three laws that describe the predictable ways things move when acted on by forces?
Isaac Newton
Gravity holds the planets in .
orbit
If gravity did not exist, a galaxy like the Milky Way would most likely do this.
fall apart!
What is the Universal Law of Gravitation?
Everything in the universe that has mass, has gravity.
Which planet has the longest year?
Don't count Pluto, its only a dwarf planet :)
Neptune
A planet’s orbital motion is caused by a balance between gravity and this.
Momentum / Inertia / Forward motion