Gravity
What is gravity?
the force that pulls any two objects with mass together.
What is the most accepted theory of the creation of the universe?
The Big Bang Theory
Define galaxy
A collection of dust, gas, and stars
Describe the contents of our solar system?
It contains the sun, the 8 planets, the asteroid belt, stars, and the Kupier Belt
What are the order of our planets?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What is mass?
The amount of matter in an object.
Who came up with the Big Bang Theory
Edwin Hubble
What are the 3 types of galaxies?
Spiral, elliptical, and irregular
What is the theory that supports the formation of our solar system?
The Nebular Theory
What are the two "categories" of planets
Rocky planets and Gas giants
What are the two factors that affect gravity?
mass and distance
How was the universe formed and what is it composed of?
Billions of galaxies
How are galaxies classified?
What is the explosion of a star? What material does it give off?
supernova, iron
What separates the inner and outer planets?
The asteroid belt
If two objects are moving away from one another, what is happening to their gravitational pull?
It decreases
The Universe is constantly....
expanding
What is the name of the galaxy our solar system is located in? What type of galaxy is it?
The Milky Way Galaxy, a spiral galaxy
What holds our solar system together?
Gravity
The further out into the solar system a planet is, the ___________ its orbital path is?
larger/longer
How does gravity affect objects in our solar system?
pull them closer together
What does the Hubble Constant state?
That as objects move further out into the universe, they are moving at a faster rate.
Galaxies are held together by....
gravity
What does the nebular theory state?
The solar system was formed from a collapse of a giant dust cloud called the solar nebula.
Why is Pluto not considered a planet?
It does not meet the requirement of having a large enough mass to where its gravity pushes everything of similar size out of its orbit.