Models of the Universe
This model placed Earth at the center of the universe.
What is the Geocentric Model?
The smallest planet and fastest to orbit the Sun.
What is Mercury?
The shape of the Milky Way galaxy.
What is a spiral galaxy?
Unit used to measure distance between planets in the same solar system.
What is an Astronomical Unit (AU)?
A meteoroid that enters Earth’s atmosphere is called this.
What is a meteor?
This astronomer supported the Heliocentric Model with telescope evidence.
Who is Galileo?
The planet famous for its ring system.
What is Saturn?
Our solar system is located here in the Milky Way.
What is on a spiral arm (the Orion Arm), halfway between the center and edge?
Distance between stars in different solar systems is measured in this unit.
What is a light year?
Another name for meteors.
What are shooting stars?
In the Heliocentric Model, what is at the center of the universe?
What is the Sun?
The four terrestrial planets.
What are Mercury, Venus, Earth, and Mars?
The largest structure: planet, solar system, galaxy, or universe.
Answer: What is the universe?
Order from largest to smallest: solar system, planet, universe, galaxy.
What is universe → galaxy → solar system → planet?
Main difference between asteroids and meteoroids.
What is asteroids are larger, meteoroids are smaller?
Johannes Kepler discovered planets move in this shape of orbit.
What is an ellipse?
These planets are made mostly of gas and have no solid surface.
What are gas giants?
In the balloon model of the expanding universe, the oldest objects are found here.
What is near the edges/farthest away?
Distance between a planet and its moon is measured in this unit.
What is kilometers?
The alignment of the Sun, Earth, and Moon during a solar eclipse.
What is Sun → Moon → Earth?
This theory explains how the universe began from a small, hot, dense point.
What is the Big Bang Theory?
Order the planets from largest mass to smallest mass.
What is Jupiter, Saturn, Neptune, Uranus, Earth, Venus, Mars, Mercury?
True or False: All planets are nearly the same composition
What is False?
Which force keeps planets in orbit around the Sun?
Answer: What is gravity?
What would happen if the Sun did not heat Earth?
What is there would be no weather?