History & Gravity
What is a heliocentric model?
Earth and other planets orbit the sun.
The sun is a hot ball of what?
Gas
What are the 4 terrestrail planets in order from closest to the sun?
Mercury, Venus, Earth, Mars
Name all four gas giant planets in order from the sun.
Jupiter, Saturn, Uranus, Neptune
How many dwarf planets are there?
5
A force of attraction between objects that is due to their masses and the distance between them is known as what?
Gravity
How many layers does the sun have?
6
What is used to measure distance in the solar system?
astronomical unit
The gas giants planets have atmospheres that are composed of what two gases?
Hydrogen and Helium
Comets come from two places in the solar system, what are those two places?
Kuiper Belt and Oort cloud
Copernicus
Dark areas that form on the surface on the sun are called what?
Sunspots
Which terrestrial planet has the most volcanoes in the solar system?
Venus
Which gas giant rotates the fastest?
Jupiter
The asteroid belt orbits between what two planets?
Mars and Jupiter
What is a geocentric model?
Earth is the center of the universe.
What is an explosive release of energy that can extend outward as far as the suns atmosphere?
Solar flares
What two things make life on Earth possible?
Water and oxygen
Seasons on Uranus last for how long?
21 years
4
How did the solar system form?
From a solar nebula
What two zones create energy in the sun?
Radiative zone and convection zone
Which terrestrial planet has the largest volcanoe and mountain range in the solar system?
Mars
What are Saturn's "rings" made of?
Orbiting particles
What is a meteoroid called that reaches the Earth's surface without burning up called?
Meteorite