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Vocabulary
Concept
Concept
Concept
Concept
100
Stars have this (a beginning, middle, end).
What is a life cycle.
100
Nuclear reactions make stars shine by releasing large amounts of _____.
What is energy.
100
In the center of a star, _____ reactions are occurring.
What are nuclear reactions.
100
A light-year is the distance light travels in a _____.
What is a year.
100
The most promising black hole is 8,000 ly from _____.
What is Earth.
200
An object whose gravity is so strong that even light cannot escape from it.
What is a black hole.
200
This pulls in on the star's gases.
What is gravity.
200
Surface temperature, size, and the distance from Earth determine a star's ______.
What is brightness.
200
This hunter is an example of a constellation.
What is Orion.
200
This celestial object has 99.8% of all the mass in our solar system.
What is the Sun.
300
Dark areas on the Sun caused by the Sun's rotation and its powerful magnetic field.
What are sunspots.
300
Our sun's life cycle will end in several _____ years.
What is billion years.
300
Our Sun is an inexhaustible source of _______ for our Earth.
What is energy
300
Producers such as _______ trap the Sun's energy to make its own food.
What are plants.
300
The Sun makes it possible for all of Earth's _________ to have a life cycle of their own.
What are living creatures
400
At the final stage, giants may become a _____
What is a white dwarf.
400
Stars spend most of their life cycle as this type of star.
What is a main sequence star.
400
This is the only way to "see" a black hole ....scientists observe their _________.
What is its effects.
400
Gas from the _______ stream towards its black hole.
What is companion star.
400
_____ leaving Alpha Centauri now will reach Earth in 4.3 yrs.
What is light.
500
This is the actual brightness of a star.
What is absolute magnitude.
500
This star is 4.3 ly from Earth.
What is Alpha Centauri.
500
The outermost part of the Sun.
What is the corona.
500
This is the layer under the Sun's corona.
What is the chromosphere.
500
This is the layer of the Sun between the core and the chromosphere.
What is the photosphere.