Gravity
Gravity is a(n) ________ force.
(Repulsive, attractive, sideways, fake)
Gravity is an attractive force.
Why does the Sun appear brighter than other stars in the sky?
The sun appears brighter because it is closer than any other star.
Kepler's first law states that all planets orbit the Sun in what kind of shape?
Kepler's first law states that all planets orbit the Sun in an Elliptical shape.
The solar system appears to have formed from a disk of __________, drawn together by ___________.
gravity, magnetism, hydrogen and oxygen, electricity, dust and gas, dust and oxygen.
The solar system appears to have formed from a disk of dust and gas, drawn together by gravity.
Some comets have very elliptical orbits. The force of gravity _________ as the comets get closer to the Sun.
Some comets have very elliptical orbits. The force of gravity increases as the comets get closer to the Sun.
If the distance between two objects increases, the force of gravity ______________.
If the distance between two objects increases, the force of gravity decreases.
Which object is NOT in our Solar System....
Halley's Comet
Pluto
The Milky Way
The Milky Way is not in our Solar System.
Kepler's second law states that objects a planet moves ___________ when it's closer to the Sun. And a planet moves _________ when it's further away from the Sun.
Kepler's second law states that objects a planet moves faster when it's closer to the Sun. And a planet moves slower when it's further away from the Sun.
If there were no other forces acting on a moving planet in space, it would move....
If there were no other forces acting on a moving planet in space, it would move in a straight line.
Moons orbit __________, and planets orbit _______.
(Name the space object they orbit.)
Moons orbit planets, and planets orbit the Sun.
If the mass of a objects increase, the force of gravity ______________.
If the mass of a objects increase, the force of gravity increases.
Why does Jupiter have more moons than Earth?
Because it has more mass, so it has more gravity to pull in moons.
Kepler's third law states that a planets year is related to ____________.
Kepler's third law states that a planets year is related to it's distance from the Sun.
The Milky Way is an example of a _________, which there are many of in the universe.
The Milky Way is an example of a galaxy, which there are many of in the universe.
The force of gravity depends on two things. What are they?
Gravity depends on the mass of the objects and the distance between them.
There is an asteroid belt between the Sun and Jupiter. The asteroids are held in place by the gravity of the Sun and the gravity of Jupiter. What would happen if Jupiter suddenly disappeared?
If Jupiter disappeared, the asteroids would be pulled in by the Suns gravity.
Which planet would you weigh the most on?
You would weigh the most on Jupiter.
What two forces work together to create a planet's orbit?