WorksheetsUnit 2: Universe and Stars Review
Total questions: 51
Worksheet time: 41mins
What components best define a Galaxy?
Gas, dust, and billions of stars
meteors, comments, and asteroids
planets, moons, and a single star
ice, rock, and dust
What do most astronomers believe to be true about the universe?
It is contracting
it is expanding
it is staying the same size
it is expanding and contracting regularly
The Barnard's star is 6 light years away from Earth. What unit of measurement does the light year represent?
Distance
Mass
Speed
Time
The photograph represents the shape of the Milky Way galaxy. Which shape best describes the Milky Way galaxy?
Circular
Elliptical
Irregular
Spiral
A researcher studies the light emitted by a distant star. The researcher finds that the light received from the star falls slightly closer to the red end of the electromagnetic spectrum when compared to a similar Source closer to Earth. The researcher claims that the star is moving away from Earth. Is the researcher correct?
No. All hot Stars emit red colored light
Yes. All moving objects emit red colored light
No. The red colored light emission is due to the composition of the star.
Yes. Light from any object moving away from Earth shifts to red colored light.
A student creates a model by placing raisins in bread dough and allowing the dough to rise for several hours. The student sketches the model before and after the dough Rises. The student claims that the model accurately describes the motion of the galaxies in the universe. What evidence from the model supports the students claim?
As the dough Rises, the size of the raisins increase, resembling the expansion of the galaxies.
As the dough Rises, the distance between the raisins decreases, indicating that the galaxy will collide.
As the dough Rises the size of the raisins decreases, resembling the emission of light from Stars.
As the dough Rises the distance between the raises increases, indicating that the galaxies are moving apart.
Diagram shows two readings of the spectral lines emitted from the same star in a galaxy.
Based on the diagram, students list claims and details in a table, as shown. Which claim is correct, and why?
Claim 1. The Galaxy is moving towards Earth.
Claim 2. The size of the Galaxy is increasing.
Claim 3. The universe is expanding.
Claim 4.. The temperature of the Sun is decreasing.
Claim 1; spectral lines can be obtained only from the stars that emit light towards the red end of the spectrum.
Claim 2; large galaxies only produce light that shows spectral lines for the red end of the spectrum.
Claim 3; galaxies move apart as the universe expands, which shifts the light towards the red end of the spectrum
Claim 4; the wavelength of light emitted from cool surfaces are long, which shifts the light towards the red end of the spectrum.
A student reads a list of several measurements. Which measurements are used as evidence of the age of the universe?
1 and 2
2 and 3
1, 2, and 3
1, 2, and 4
Stars in the universe very in size, luminosity, and temperature. The hertzsprung-russell diagram helps astronomers categorize the Stars.
The sun is a main sequence star. In approximately 5 billion years the Sun's temperature will decrease and its Luminosity will increase as a result of diminishing amounts of hydrogen. After another couple billion years, the Sun's temperature will be higher than it is today, while its Luminosity will be lower. What is the sequence of the sun's classification from now and into the future?
Main sequence, red giant, white dwarf
main sequence, blue giant, white dwarf
main sequence, white dwarf, read Giant
main sequence, blue giant, red giant
The graph shows the velocities and distances from Earth for several galaxies in the universe. What can be concluded from the graph?
The closer the Galaxy, the faster it moves toward Earth.
The coast of the Galaxy, the slower it moves toward Earth.
The farther the Galaxy, the faster it moves away from Earth.
The farther the Galaxy, the slower it moves away from Earth.
Which unit is commonly used to express distances between stars and galaxies?
Astronomical units (AU)
kilometers (km)
light years (LY)
nanometers (NM)
Which is the correct sequence from largest to smallest?
Universe, Milky Way, solar system
Milky Way, universe, so it's just
solar system, Milky Way, universe
Universe, solar system, Milky Way
A group of students makes different models to represent the Milky Way and the position of the sun, as shown. which students model correctly shows the shape of the Milky Way and the position of the sun?
Student 1
student 2
student 3
student 4
Which statement describes the sun's position?
It is the center of the universe.
It is the center of the Milky Way galaxy.
It is the center of the solar system.
It is the center of the big bear constellation.
Proxima Centauri is a star about 4/25 light years from Earth. What does the unit of a light year measure?
The speed of light emitted from the star.
The time taken for light to travel.
The length of a year on the star.
The distance light travels in one year.
What is the final stage of a low mass star?
White Dwarf
Black Hole
Red Giant
Neutron Star
What is the final stage of a high mass star?
White Dwarf
Black Hole
Red Giant
Neutron Star
Which star is likely to be the hottest? Use the H-R diagram
Type B Star
White Dwarf
Red Giant
Type G Star (Sun)
Which mass of star will have the shortest life span?
Low Mass Star
Medium Mass Star
High Mass Star
Very High Mass Star
Which stage of life is the sun currently in?
White Dwarf
Planetary Nebula
Main Sequence
Red Giant
What is the name of the cosmic cloud of dust and gas that is the first stage in the birth of a star?
Protostar
Spiral Galaxy
Quasar
Stellar Nebula
A stellar nebula will eventually condense into a hot ball of mostly hydrogen called a __________. At this point, nuclear fusion has not yet started but it will soon.
Protostar
White Dwarf
Brown Dwarf
Main Sequence
In a low-medium mass star, at the end of the red giant stage, the red giant's atmosphere expands outward to create a...
White Dwarf
Planetary Nebula
Supernova
Neutron Star
In a low-medium mass star, after the end of the red giant phase, a hot inner core of the star is left over. This core is a called a __________. There is no longer nuclear fusion happening at this stage.
White Dwarf
Planetary Nebula
Supernova
Neutron Star
In a high mass star, at the end of the red giant phase, the gravity causes the star to rapidly collapse. This collapse causes a massive explosion called a __________
White Dwarf
Planetary Nebula
Supernova
Neutron Star
In a very high mass star, a supernova triggers the formation of a __________ which has a gravitational pull so strong that even light cannot escape.
White Dwarf
Neutron Star
Stellar Nebula
Black Hole
Which elements are found in a main sequence star?
Hydrogen (H)
Helium (He)
Carbon (C)
Oxygen (O)
Which is one of the heaviest element found in a red giant star?
Nitrogen (N)
Iron (Fe)
Sulfur (S)
Magnesium (Mg)
Elements heavier than iron are not formed in Main Sequence or Red Giant Stars. Where are heavier elements like silver, gold, and lead formed?
White Dwarfs
Stellar Nebulae
Neutron Stars
Supernovae
What Galaxy is Earth located?
Andromeda
Milky Way
Sagittarius
Snickers
The distance light can travel in one year is ______________
15,000 kilometers
1 light-year
15 Astronomical Units
6,000 miles
Most scientists believe the Big Bang Theory explains which of the following questions?
How our planets and moons formed
How our universe began
How the sun turns hydrogen into helium
How fast light travels through space
Which statement is true?
The galaxies are moving toward us.
The galaxies are moving away from us.
The universe remains static or unchanged in motion.
None of the above
As galaxies move away from our galaxy
a shift on the electromagnetic spectrum is noticed. This phenomena is
called _____________.
redshift
blueshift
Nature of the Universe
Big Bang Theory
Cosmology
Cosmetology
Choose the correct explanation(s)
Blue stars are actually colder than red stars. Their low temperature makes them have a chilly environment which results in an outward blue colour.
As the star gets hotter, the wavelength will decrease and moves further to the left, the ultraviolet end of the spectrum. Thus, bluer stars which are on the left of the spectrum are hotter than red stars.
Blue stars are hotter than hot stars because they generally have a greater mass. This means that they have more energy to burn up for fusion in the core, resulting in higher temperatures than red stars.
None of the above
What kind of star has the longest lifespan?
A very massive star, like a blue giant
An average sized star, like our Sun
A star with low mass, like a red dwarf
Which stage of life is the sun currently in?
White Dwarf
Planetary Nebula
Main Sequence
Red Giant
What galaxy do we live in?
Irregular Galaxy
Spiral Galaxy
Elliptical Galaxy
The toilet
Which type of galaxy is most common
giant elliptical
spiral
irregular
Which type of galaxy has the most dust and gas
elliptical
spiral
irregular
they are about the same
