A Solar System is Born
The Earth Takes Shape
The Planets
Formation of the Universe
A Little Bit of Everything
100
Is composed of the sun, planets, and other bodies that travel around the sun.
What is the solar system?
100
How many layers make up the Earth's composition?
What is three?
100
According to your textbook, there are ________ planets in our solar system.
What are nine planets?
100
The study of the origin and future of the universe is called __________.
What is cosmology?
100
The average distance between the Earth and the sun is called the ______________.
What is the astronomical unit (AU)?
200
The measure of the amount of matter in an object.
What is mass?
200
This layer of the earth contains the heaviest materials (nickel and iron).
What is the core?
200
Mercury, Venus, Earth, and Mars make up the inner or _________ planets.
What are the terrestrial planets?
200
This theory that states that the universe began with a tremendous explosion is known as ___________.
What is the Big Bang Theory?
200
Around 4.6 and 3.9 billion years ago, _________ began on Earth.
What is life?
300
The motion around the sun along its orbit.
What is revolution?
300
This gas is said to be a good greenhouse gas.
What is carbon dioxide?
300
Has a similar rotation to Earth's, with a rotation of 24 hours and 37 minutes.
What is Mars?
300
How many years ago that scientists state the big bang occurred.
What is 12 to 15 billion years ago?
300
The clockwise direction of a planet's rotation.
What is retrograde rotation?
400
The name of the nebula that formed our solar system.
What is the Solar Nebula?
400
_________ brought carbon, hydrogen, oxygen, and nitrogen into the Earth's atmosphere.
What are comets?
400
With no known surface, Jupiter, Saturn, Uranus, and Neptune are called the _________________.
What are the gas giants?
400
______________ is considered supporting evidence that the big bang theory is correct.
What is cosmic background radiation?
400
There is no measurable center and no apparent edge to ____________.
What is the universe?
500
Bits of dust that collide and start forming tiny building blocks of planets are called _____________.
What are planetesimals?
500
_________ formed when lighter materials gathered on the surface and rose above sea level.
What are continents?
500
Hydrogen, Helium, Methane, Ethane, and Ammonia make up this planet's atmosphere.
What is Saturn?
500
_______________ and _______________ discovered cosmic background radiation.
Who are Robert Wilson and Arno Penzias?
500
The collapsing of the universe into its original state is called ____________.
What is the "big crunch"?
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