Theories
TRUE OR FALSE: Galileo's model, B, was called the heliocentric model.
False: The geocentric model proposed that the Earth did not move but the other planets did.
True of False: In our solar system, objects can orbit various planets, not just Earth.
False: The planets vary in size and composition.
Name the planets that are considered TERRESTRIAL?
This is a terrestrial planet and the innermost and smallest planet in the solar system, orbiting the Sun once every 88 days.
Mercury
The student wonders why planets are generally spherical, while most asteroids are not. How would you explain this shape difference?
Asteroids have too little gravity to form a spherical shape.
Trur or False: Initially, heliocentric meant that the Sun was the center of the universe, but as astronomers studied the movement of the planets, that was changed.
True
Then ORDER the terms, beginning from smallest to largest. Remember, Earth orbits the Sun!
1. Sun
2. Solar System
3. Milky Way Galaxy
4. Universe
Which Planets are considered GAS?
Saturn, Uranus and Neptune
The second-closet planet to the Sun, it is also classified as a terrestrial planet and it is sometimes called Earth's "sister planet" because the two are similar in size, gravity, and composition.
Venus
Although Neptune is the farthest planet from the Sun, it travels in a fixed orbit around the Sun and never changes its path. What is the reason for this?
The gravitational pull of the Sun holds Neptune in its orbit.
True or False:The Big Bang Theory- The universe expanded from its origin during the Big Bang.
True
The Milky Way galaxy (pictured above) is an example of a(n) __________________ galaxy. At the center of the galaxy is a galactic bulge that is around 20,000 light years long. In the very center of the galaxy is a massive _______________ that is 4 million times the mass of the sun and has a huge gravitational pull.
spiral, black hole
Name the planets in order starting from the Sun.
(My Very Educated Mother Just Served Us Nachos)
Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
This is the fifth planet from the Sun and is the largest one in the solar system, containing more matter than all of the other planets combined.
Jupiter
Most of us have probably seen meteors or shooting stars. A meteor is the flash of light that we see in the night sky when a small chunk of interplanetary debris burns up as it passes through our atmosphere. "Meteor" refers to the flash of light caused by the debris, not the debris itself.
What do we call the debris just before it enters the Earth's atmosphere?
meteoroid
This is the ______________ Model.
The Heliocentric Model
Galaxies are systems of stars, gases, and dust that exist in a wide variety of shapes and sizes. The simplest classification scheme devised by Edwin Hubble recognizes four basic types of galaxies; elliptical, spiral, barred spiral, and irregular. Identify the shape of Earth’s galaxy.
Spiral
What is the 3rd planet from the Sun?
Earth
This is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter and is one of the four Jovian planets.
Saturn
The white ring seen here, within our solar system, is a(n) ________ belt.
asteroid
The_____________ theory that the Earth is the center of the universe, with the sun and planets revolving around it.
The geocentric model
The diameter of Saturn is almost ten times that of the Earth, but its density is much less. This can best be explained by the fact that Saturn—
is a gaseous planet.
This is is the fourth planet from the Sun in the solar system and is a terrestrial planet with a reddish color.
Mars
This is the eighth and farthest planet from the Sun in the solar system.
Neptune
A small body starts its life as a _______ floating through space between the planets until it makes a bright streak of light in Earth’s atmosphere as a _______ and then, if it isn’t consumed by frictional heating, finally lands on the ground as a ________.
Fill in the blanks to correctly identify the relationship between meteors, meteorites, and meteoroids.
meteoroid; meteor; meteorite