O'Connor - ESPS Astronomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The early universe was primarily made up of what elements? | Helium and Hydrogen
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| What is the ratio of hydrogen to helium in the early universe? | Hydrogen made up approximately 73% of the early universe while Helium made up 25%. The other 2% were the other elements.
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| What does the process of nuclear fusion release? | Nuclear fusion releases energy
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| Describe what kind of star creates a supernova explosion? | Red giants and red supergiants.
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| How does a star's mass and elements change over it’s lifetime? | The mass becomes greater and the elements become heavier.
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| What does an H-R diagram represent? | The luminosity against their surface temperature or their color against their absolute magnitude.
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| What does analyzing the light that a star emits tell a scientist? | The luminosity and the elements that the star is composed of.
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| What color are the hottest stars? | The hottest stars are blue.
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| What is the difference between absolute magnitude and apparent magnitude? | Absolute magnitude is how bright something actually is and apparent magnitude is how bright something appears from Earth.
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| In a main sequence star what fuses together? | Helium and hydrogen nuclei.
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| What color are the coolest stars? | The coolest stars are red.
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| What is a Nebula? | A cloud of dust and/or gas in outer space.
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| What is a Neutron Star? | The collapsed core of a giant star that had between 10-29 masses.
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| What is a Black Hole? | A part of space that has such a great gravitational pull that nothing can escape it, not even light.
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| What is a Supernova? | A star that's brightness suddenly gets bigger and then loses all fo it's matter.
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| What is a Protostar? | A contracting mass made up of gas that's in the early stage of becoming a star.
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| What's a White Dwarf? | A small extremely dense star that is normally the size of a planet.
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| What is a Red Giant? | A very large star that's extremely bright but has very low surface temperature.
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| In the equation E=mc^2 what does E stand for? | E stands for energy.
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| In the equation E=mc^2 what does m stand for? | m stands for mass.
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| In the equation E=mc^2 what does c stand for? | c stands for the speed of light in a vacuum.
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