This is released as light and heat from nuclear reactions.
What is energy?
100
A cloud of gas and dust formed by medium-mass stars and is made up of carbon, oxygen, and other light elements.
What is a nebula?
100
These objects are made through geologic processes, but the elements all come from high-mass stars.
What is carbon?
100
This element is required for almost all life, is found in the water, is found in many rocks and in the atmosphere and is produced in medium-mass stars as they die.
What is hydrogen?
100
The explosive death of a red supergiant. It is so bright that it can sometimes be seen during the day.
What is a supernova?
200
A force that holds the nucleus together.
What is gravity?
Or...
What is strong nuclear force?
200
A cloud of condensed gas and dust that is hot enough to glow.
What is a protostar?
200
These objects are made through geologic processes, but the elements all come from high-mass stars.
What are heavy elements?
200
We use it for engines, to make plastics, and to make gasoline. It is made from compressed plants, harnessing tons of energy that originally came from the sun.
What are fossil fuels?
200
A star that is middle-aged and spends most of its time making helium. The sun is a star like this.
What are main sequence stars?
300
An element used to make helium by fusion.
What is hydrogen?
300
These stars produce heavy elements, like gold and silver when they die in Supernova explosions.
What are heavy-mass stars?
300
This element acts like a fire extinguisher, killing the stars that produce it.
What is iron?
300
Made of gases, this part of the Earth came from a medium-mass star. It is held on by gravity and contains nitrogen, carbon dioxide, argon, oxygen, and other traces of elements.
What is the Earth's atmosphere?
300
Stars that only make helium and live the longest lives of all stars.
What are low-mass stars?
400
What equations represents the generation of energy after fusion?
What is E=mc^2?
400
An old star that is making heavier elements and will soon die. It is often bigger than it used to be.
What is a red giant?
400
An element used in all life on earth and produced by medium-mass stars like our sun.
What is carbon?
400
Stars produce this in abundance from all their nuclear reactions. Plants need it to grow and animals need it to see.
What is carbon?
400
When nuclear fusion stops, all matter collapses to the core, and the core burns brightly, this is formed.
What is a white dwarf?
500
What causes a star to "brighten" again?
What is nuclear fusion?
500
These sometimes rocky and sometimes gaseous space objects are usually large enough to have gravity and are made of dead star leftovers.
What are planets?
500
This yellowish, rare element is only produced in supernovae and is found in rocks, usually clumped together.
What is gold?
500
Stars also produce this through nuclear reactions and transmit it by radiation. Without it, life could not exist because the earth would be frozen solid.
What is solar energy?
500
A very large and bright star whole color depends on its temperature.