Science Space
By comparing the actual brightness of a star to its apparent brightness astronomers can determine a star's - A distance from Earth. B diameter in kilometers. C age compared to the Sun. D mass to the nearest kilogram.
A
Light years are used by astronomers to measure what property of celestial bodies? A Distance from Earth B Time since formation C Internal temperature D Absolute brightness
A
Stars are made mostly of which two elements? A Hydrogen and helium B Mercury and strontium C Iron and potassium D Krypton and bismuth
A
What percentage of visible stars are closer to Earth than the Sun? A 0% B 25% C 50% D 100%
A
Which of the following best describes the position of the Sun relative to other objects in space? A On the edge of the Milky Way Galaxy. B At the outer edge of our solar system. C Halfway between Venus and Jupiter. D Farther from Earth than any other star.
A
Which of the following components of the universe is best described as an interstellar cloud of dust and gases where stars can form? A A nebula B A planet C A meteor D A galaxy
A
A characteristic of a nebula is that it - A is at the center of the solar system. B is a region where stars are born. C forms halfway through a star's life cycle. D has the coolest temperature in space.
B
A nebula is a cloud of dust in space that does not emit any light. How can astronomers use spectral analysis to determine the composition of a nebula? A Sending high energy light waves to the nebula that reflect back to Earth. B Analyzing the light from stars behind the nebula which passes through. C Using the composition of clouds in Earth's atmosphere as a model. D Collecting samples of a nebula that happen to reach our solar system.
B
Astronomers can determine the chemical composition of stars by observing which of the following? A Speed of rotation of the star at its equator. B Wavelengths of light emitted by the star. C Time the star takes to move through the night sky. D The season of the year in which the star is seen.
B
Astronomers make observations in visible light, but also in other parts of the electromagnetic spectrum, such as radio and gamma waves. Scientists make observations in different wavelengths because - A the information provided by visible light is not a reliable source of data. B observations in different wavelengths provide different information about stars. C the equipment required for observations in other wavelengths is expensive. D visible light only provides information about the closest objects in our galaxy.
B
Many of the stars seen in the night sky are much larger than our Sun, but appear much smaller. The Sun appears larger than larger stars because the Sun is - A a yellow star. B much closer. C much hotter. D much cooler.
B
Proxima Centauri is a star that is 4.2 light years from Earth. Based solely on this information, which of the following conclusions can be drawn? A The diameter of this star is more than four times larger than the Sun. B Light we see from the star took more than four years to reach Earth. C This star takes a little more than four years to make one rotation. D The gravity of this star would make an object weigh four times more than on Earth.
B
Proxima Centauri is the closest star to Earth after the Sun and is located 4.3 light years away from Earth. How long does it take light from Proxima Centauri to reach Earth? A 1 year B 4.3 years C 43 years D 10 trillion years
B
Which of the following is an accurate description of the relationship between components of the universe? A Stars always contain galaxies. B Galaxies contain many stars. C Stars contain several nebulae. D Nebulae contain many galaxies.
B
A system of stars, gas, dust, and dark matter bound together by gravity is called - A an asteroid. B a nebula. C a galaxy. D a moon.
C
Galaxies are classified by their shapes into all of the following types EXCEPT - A spiral galaxy. B irregular galaxy. C oblong galaxy. D elliptical galaxy.
C
Light years are used by astronomers to measure what property of celestial bodies? A Temperature B Age C Distance D Brightness
C
Our Sun is what type of celestial object? A Planet B Comet C Star D Asteroid
C
Stars that are relatively close can be distinguished from stars that are much farther away by making observations at different times during the year. This is because - A closer stars will change a lot in size, while more distant stars appear the same size. B more distant stars always appear to be the same color, but closer stars change color. C closer stars will appear to shift more in relative position compared to more distant stars. D more distant stars move more quickly through the sky in some seasons than closer stars.
C
The stars and all the other matter in a galaxy are held together by which of the following? A Dark matter B Inertia C Gravity D Magnetism
C
To express the distance between the Milky Way galaxy and the Andromeda galaxy, the most appropriate unit of measure is the - A meter. B kilometer. C light year. D astronomical unit.
C
Which of the following best describes a galaxy? A galaxy is - A a particle of debris in the solar system that does not act as a satellite of any planet. B a visible body of liquid or frozen crystal droplets suspended above a planetary surface. C a massive system of stars, gas, dust and dark matter bound together by gravity. D the visible path of a meteoroid as it enters Earth's atmosphere.
C
A large celestial body made of gases that emits light due to nuclear reactions is called - A a galaxy. B a nebula. C a comet. D a star.
D
A light year is a reasonable unit for measuring the size of which of the following? A Asteroid B Planet C Star D Galaxy
D
An interstellar cloud of dust and gases that serves as a location for the formation of new stars is - A a meteor. B a planet. C a galaxy. D a nebula.
D
Astronomers can heat elements here on Earth and observe the wavelengths of light, which the elements emit. By then analyzing the light from distant stars, the astronomers can determine what property of these stars? A Average diameter B Distance from Earth C Overall shape D Chemical composition
D
Galaxies are classified into all of the following types by their shapes EXCEPT - A spiral. B elliptical. C lenticular. D crescent.
D
Stars are made mostly of which two elements? A Selenium and sodium B Astatine and arsenic C Chlorine and cesium D Hydrogen and helium
D
The wavelengths of light emitted by a star can provide information on all of the following characteristics of a star EXCEPT - A temperature of the star. B direction of movement of the star. C chemical composition of the star. D number of planets orbiting the star.
D
Which of the following best describes a nebula? A nebula is - A a region in the solar system that is occupied by irregularly shaped bodies. B a large and icy celestial body with an irregular orbit around the Sun. C a natural satellite created by the collision of two large asteroids. D an interstellar cloud of dust, hydrogen, helium and other gases.
D
Which of the following best describes a star? A star is a celestial body - A composed of rock and metal with a very high density. B that is too big to be an asteroid, but too small to be a planet. C that rotates on an axis and revolves around the Sun. D composed of gases that emit light due to nuclear reactions.
D
Which of the following best describes the relative size of our Sun? A Among the group of largest stars. B The largest star in our galaxy. C The smallest star in our galaxy. D Medium-sized compared to all stars.
D
Which of the following characteristics of elements is used by astronomers to determine the chemical composition of distant stars? All elements - A can be represented by chemical symbols. B are either metals, nonmetals or metalloids. C are composed of smaller particles, such as electrons. D emit certain wavelengths of light when heated.
D
Which of the following components of the universe is best described a system of stars, gases, and dust held together by gravity? A A nebula B A planet C A meteor D A galaxy
D
