9th - 12th grade
Played 89 times
Compared to human experience, the Universe has been around a long time, nearly ___
The notation used for numbers that are really big is called ___
Scientific notation is a shorthand way of expressing numbers using powers of ___
With scientific notation, every time the exponent goes up by one the actual number is ___
A million is 10 to the sixth, a billion is 10 to the ___
10¹⁸ isn't twice as big as 10⁹, it's ___
Astronomers Fred Adams and Greg Laughlin wrote about very long time scales in their book, ___
The first epic of the Universe, covering from the Big Bang up until the formation of stars, is called ___
The current era, where stars are the dominant objects, is called ___
How long can the lowest mass red dwarf fuse hydrogen into helium?
Near the end of the Stelliferous Era, what will happen to the light emitted by galaxies?
When the last star dies, the only objects left in the universe generating appreciable energy will be ___
When most objects are supported by various forms of degeneracy pressure, the Universe will appear ___
In the Degenerate Era, binary white dwarf orbits will decay and the stars will merge and ___
During the Degenerate Era, which subatomic particle of normal matter will decay?
At the end of the Degenerate Era, the only big objects that will be left are ___
In the 1970s, which physicist worked out the math of black holes and discovered that they can emit particles?
Approximately how long will a black hole, with three times the Sun's mass, take to evaporate?
Even supermassive black holes in galactic centers evaporate. It takes them about ___
The theoretical model where the cosmic horizon shrinks until it’s smaller than a subatomic particle is called ___
The term "multiverse" refers to the hypothesis that the Universe ___