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Stars and Galaxies

8th grade study guide for stars and galaxies

QuestionAnswer
What is the apparent movement of a star used to measure its distance from Earth? Parallax.
What is the stage in a star's evolution formed as the core of a main sequence star uses up its helium and the outer layers escape into space? White Dwarf.
What is the galaxy type without definite shape? Irregular Galaxy.
What is the process that produces energy in the Sun? Fusion.
What is the distance measurements based on the speed of light; used for objects in space? Light-year.
What is the recent evidence that suggests the Milky Way Galaxy may be this type? Barred Spiral Galaxy.
What is about 100,000 light-years across? Milky Way Galaxy.
What is the classification of most stars on the H-R diagram? Main Sequence
What is the graph that shows the relationship of a star's temperature to its absolute magnitude? H-R Diagram.
What is the largest known galaxy type? Elliptical Galaxy.
___ are patterns of stars in the sky. Constellations.
A main sequence star becomes a ____ after is uses up the hydrogen in its core. Giant.
The ___ states between 15 and 20 billion years ago, the universe began expanding out of an enormous explosion. Big Bang Theory
The positions of the constellations appear to change throughout the year because ____. Earth revolves around the Sun.
The hottest stars in space are ____ in color. Blue.
___ is the apparent shift in the position of an object when viewed from two locations. Parallax.
The coolest stars in the sky are ___ in color. Red.
The sun produces energy by forming ___ in its core. Helium.
A star beings as a ___; a large cloud of gas and dust. Nebula.
Prominences and flares on the Sun are related to sunspots because they are all cause by ___. intense magnetic fields.
A group of stars, gas, and dust held together by gravity is a ___. Galaxy.
The Sun produces energy by fusing hydrogen atoms into ___ atoms in its core. Helium.
As Earth travels in its ___, different constellations are visible at different times of the year. Orbit.
The number of observed sunspots, prominences, and flares increases in a cycle that occurs every ____ years. 20.
About 90 percent of the stars in space are ___ stars. Main Sequence.
Our Sun is considered average because its temperature and absolute magnitude place it in the ___ rang of the H-R diagram. Main Sequence.
A red shift in the spectrum of the light from an object indicates the object is moving ___ you. Away from.
The Big Bang theory or the formation and expansion of the universe is supported by the observed ___. Red Shift.
A ___ is a region so dense that nothing, including light, can escape its gravity field. Black Hole.
The intense magnetic fields of sunspots cause archlike eruptions called ___. Prominences.
Dark, cooler areas on the Sun's surface are called ___. Sunspots.
Two stars orbit each other in a ___ star system. Binary.
The distances to nearby stars can be measured by using ___. Parallax.
The spiral shape of the Milky Way Galaxy CANNOT be seen from Earth because ___. We are located within one of its spiral arms.
 

 



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