Stars
The Life Cycle of Stars
Galaxies
Formation of the Universe
Vocabulary
100
What is the brightness of a star as seen from the Earth?
What is apparent magnitude.
100
What is a large, reddish star late in its life cycle?
What is a red giant.
100
What are large groups of stars, dust, and gas?
What is a galaxy.
100
What is the study of the origin, structure, and future of the universe called?
What is cosmology.
100
What is the distance that light travels in one year?
What is a light-year.
200
What is the brightness that a star would have at a distance of 32.6 light-years from Earth?
What is absolute magnitude.
200
Name two ways a star can be classified.
What is size, mass, brightness, color, temperature, spectrum, and age.
200
What type of galaxy has a bright center and very little gas and dust?
What is an elliptical galaxy.
200
What is the theory that the universe began with a tremendous explosion?
What is the big bang theory.
200
What is the band of color produced when white light passes through a prism?
What is a spectrum.
300
What is an apparent shift in the position of an object when viewed from different locations?
What is parallax.
300
What graph shows the relationship between a star's surface temperature and absolute magnitude?
What is the H-R Diagram.
300
What type of galaxy may be distorted by other galaxies?
What is an irregular galaxy?
300
What "leftover" from the formation of the universe is evidence that the big bang theory is true?
What is cosmic background radiation.
300
What is a group of older stars that looks like a ball and can contain up to one million stars?
What is a globular cluster.
400
What are lines that are made when certain wavelengths of light, or colors, are given off by hot gases?
What is emission lines.
400
What are three objects in space that are formed by a supernova?
What is a black hole, neutron star, and pulsar.
400
What is a luminous, starlike object that generates energy at a high rate?
What is a quasar.
400
The expansion of the universe is dependent on how much _______ the universe contains.
What is matter.
400
What is a large cloud of dust and gas in interstellar space?
What is a nebula.
500
What is produced when light from a hot solid or dense gas passes through a less dense, cooler gas?
What is an absorption spectrum.
500
Name a type of energy that a pulsar emits.
What is radio and optical energy.
500
Why is looking through a telescope like looking back in time?
What is because it takes time for light to travel throughout space.
500
Name two ways scientists can calculate the age of the universe.
1) Measuring the distance from Earth to various galaxies. 2) Calculating the ages of old stars.
500
What is an object so massive and dense that even light can't escape its gravity?
What is a black hole.
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