The Solar System
These are the (8) planets, from closest to furthest from the sun.
What are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
This planet takes the longest to get around the sun.
neptune
Define Heliocentric
Sun-centered
Define Geocentric
Earth Centered
The more mass = the _______ gravitational pull
more
Name (3) characteristics of inner planets.
Rocky, smaller, fewer moons, no rings, more dense
This planet takes the shortest time to get around the sun.
Mercury
This astronomer first proposed the idea of a heliocentric model but his work was banned upon his death
Copernicus
Who first created the geocentric model of the solar system
Aristotle
The more mass a planet has the ________ moons it has
more
This is a mixture of frozen gas, ice, and dust
Mercury has a ___________ temperature than saturn
higher
This heliocentric astronomer used the telescope to look at the sky
Galileo
planets orbit in __________ not circles
Ellipses
Jupiter and Saturn have the greatest _________ which means they have the greatest gravitational pull
Mass
The four outer planets have atmospheres made up of helium and hydrogen, this is why they are called what?
Gas Giants
Why do planets orbit the sun.
The sun's gravitational pull, it pulls planets toward it.
In a heliocentric model, the __________ is at the center
Sun
telescope
Rockets and telescopes are examples of _______ to help us understand the solar system
Technology
This planet has volcanos, rocky surface, and is too hot to support life.
Venus
what roll did gravity play in creating the solar system.
it pulled the dust and gas together.
What did Galileo first see through the telescope. (hint, planet and something near it)
Jupiters moons
The less mass the what of the gravitational force?
the weaker
What two subjects in school help develop our understanding of the solar system.
Math and Science