Unit 1a
The theory that states the universe began with a tremendous explosion 13.7 billion years ago
What is the Big Bang Theory
The theory that states the Earth is the center of the solar system.
What is Geocentric?
This force is what keeps objects in space continuing along its path in universe
What is Inertia
A small body of ice, rock, and cosmic dust loosely packed together that follows an elliptical orbit around the sun and that gives off gas and dust in the form of a tail as it passes close to the sun is called
What is a comet
A bright streak of light that results when a meteoroids burns up in the Earth's atmosphere is called an
What is a meteor
Ptolemy believed that the ______ was the center of the universe.
What is the Earth
The larger the mass, the ________
What is the stronger the gravitational pull?
The path that a body follows as it travels around another body is space is called
What is Orbit
The planet that is capable of supporting life.
What is Earth?
Spiral
What is the shape of the Milky Way Galaxy?
This astronomer was the first to use a telescope to observe objects in space
Who is Galileo
This is one complete trip along its orit
What is revolution
A meteoroid that reaches Earth surface without burning up completely is called an
What is a meteorite
This is a small, rocky object that orbits the sun, usually in a band between the orbits of Mars and Jupiter
What is an Asteroids
Planets discovered outside our Solar System
What astronomer believed that the sun was the center of the solar system?
Who was Copernicus?
Our solar system located where in our galaxy.
What is on an outer arm called Orion Spur?
This is the large wide region between Mars and Jupiter
What is the Asteroid Belt
The Four Inner planets include ___
What is Mercury,Venus, Earth,Mars?
One complete spin on an axis; creates a day
Every object in the universe is a part of a larger system. Earth is part of our solar system, which is in turn part of this galaxy
What is the Milky Way galaxy
The two invisible forces that keeps all objects in orbit.
What is gravity and inertia?
Name the four Outer Planets
What is Jupiter, Saturn, Uranus, and Neptune
The 3 characteristics that something needs to be considered a planet include___.
What is 1) Orbit a star, 2) Have enough mass to be nearly spherical, and 3) Not have cleared the area around its orbit of smaller objects.
Theory that states the sun is the center of the Solar System.
What is Heliocentric