WorksheetsUnit 5: The Universe review 2025
Total questions: 48
Worksheet time: 32mins
What is the leftover energy from the Big Bang?
Black Hole
Nebula
Cosmic Background Radiation
Universe
What is the spiral galaxy of which the Sun and the solar system are a part of?
Spiral Galaxy
Elliptical Galaxy
Irregular Galaxy
Milky Way Galaxy
What is a galaxy with no identifiable shape or structure?
Spiral Galaxy
Elliptical Galaxy
Irregular Galaxy
Milky Way Galaxy
What is the distance light travels in one year?
Kilometers
Light year
Miles
Centimeters
What is a huge collection of stars, gas, and dust held together by gravity?
Universe
Star
Galaxy
Nebula
What is a graph that plots luminosity v. temperature of stars?
Hertzsprung-Russell Diagram
Nelson Chart
Lightyear
Black Hole
What is a star that fuses hydrogen into helium in its core?
Giant Star
Main Sequence
Supergiant Star
White Dwarf
What is a star that forms as the core of a giant star no longer
supports fusion and the star’s outer layers escape into space,
leaving a hot and dense core?
Giant Star
Main Sequence
Supergiant Star
White Dwarf
What is an enormous explosion that destroys a star?
Nebula
Gravity
Supernova
Black Hole
What is a massive sphere of gas (mostly hydrogen and helium) held together by gravity, undergoing constant thermonuclear fusion, and producing both heat and light?
Star
Planet
Moon
Supernova
What is a cloud of dust and gas in space that develops into a star?
Nebula
Protostar
Supernova
Planetary Nebula
What is a cloud of dust and gas?
Protostar
Galaxy
Neutron Star
Nebula
What spectral class do the hottest stars belong in?
B
F
M
O
How do scientist know the universe is still expanding?
Most objects in space have a redshift
Most objects in space have a blueshift
We can measure how far away things are using lightyears
It is not expanding
What stage will our sun enter when it runs out of hydrogen?
White Dwarf
Red Giant
Red Super Giant
Super Nova
The path that the earth revolves in is due to-
the gravitational attraction between the earth and the moon
the gravitational attraction between the sun and the moon
the gravitational attraction between the sun and the earth
the rotation of the earth
If Earth's orbit were suddenly interrupted by a mega-giant-spaceship that interfered with all of the gravitional pull of the universe, and negated all star and planetary gravity, what would happen to earth?
Politicans would say "don't look up. Nothing's happening."
The Moon would continue orbiting Earth because it likes us so much.
According to Newton's Laws, velocity would cause Earth to fly in a straight line tangent to its direction at the moment gravity stopped.
According to Newton's Laws, apples fall from trees because the curvature of the Earth is only happening when the Moon is in view.
Why can we not see the entire shape of the Milky Way galaxy from Earth?
because Earth is a part of the MIlky Way
because the galaxy is spiraling
because we do not have the technology
because there is a black hole in the center
Hotter stars look more ___________.
Bluish
Reddish
Yellowish
White
Why does the sun appear to be brighter than any other star in the Milky Way?
It is the closest star to Earth.
It is the hottest star.
It is the brightest star.
It has the most energy of all stars.
It is the oldest star.
Our Sun is one of the many stars that has been classified as average. Its luminosity and its temperature place it in the middle of which area of the H-R diagram.
Red Super Giant
Red Giant
White Dwarfs
Main Sequence
Some used to believe that Earth was the center of the universe. Some also used to believe that all stars become white dwarves, neutron stars, or black holes because of how close the stars were to Earth. Is this true?
Yes. Earth is the center of the universe, and all universal events are due to human intelligence.
Yes. A star's proximity to Earth determines is final life stages.
No. Earth's political leadership determine the star's final life stages. Everyone knows that.
No. Earth's proximity to any star has no bearing on it's final life stages. That is the result of the mass of the star.
Look at the H-R Diagram. Where is Pollux?
In the main sequence
with the Super Giants
with the Giants
with the White Dwarfs
Red stars are the _____________.
hottest
coolest
biggest
Blue stars are the _____________.
hottest
coolest
smallest
Where is the Earth found in our Milky Way Galaxy?
In the middle of the galaxy
On the Edge of a Spiral arm
In Andromeda
Earth is moving side to side of the galaxy
Sven Yordelberger argued that a star's mass is what determines whether it will become a white dwarf or a black hole. Grugel Liversport argued that it's based on chemical composition. Which one is correct?
Grugel
Sven
Compared to the rest of the stars, our sun is considered...
Extremely Large and Cold
Small with a medium temperature
Medium size with medium temperature
What determines the color of a star?
It's size
It's temperature
It's composition
They are all the same color
What type of galaxy is this?
Spiral
Elliptical
Irregular
Irrational
Which description best describes area B
Brighter and Hotter
Brighter and Cooler
Dimmer and cooler
Dimmer and Hotter
Which best describes stars located in area A
Bright and Hot
Cooler and bright
Dim and hot
Dim and colder
What is the approximate surface temperature of the Sun?
3,000 C
5,500 C
10,000 C
20,000 C
Which type of star has the following life cycle:
Nebula-Protostar-Main Sequence-Red Supergiant-Supernova-Black Hole / Neutron Star
Large Mass Star (Massive)
Small Mass Star
The Sun
The Moon
Which type of star has the following life cycle?
Nebula-Protostar-Main Sequence-Red Giant-Planetary Nebula-White Dwarf-Black Dwarf
Large Mass Star (Massive)
Small (Low) Mass Star
The Moon
Jupiter
What is the force that holds a galaxy together?
heat
dark energy
light
gravity
Which answer correctly compares the masses of two objects in the universe?
A galaxy has less mass than nebulae and more mass than a star
A star has more mass than a planet and less mass than a galaxy
A moon has more mass than a star and less mass than a planet
A universe has less mass than a galaxy and more mass than a planet
Which of these statements is true concerning the Milky Way galaxy?
Earth is located in the center of the Milky Way galaxy.
The Sun is one star that can be found in the Milky Way galaxy.
There are approximately one million stars in the Milky Way galaxy.
There are nine planets in the Milky Way galaxy.
Where in the Milky Way is the Sun found?
in the center
at the outer edge on an arm
What evidence indicates that galaxies are moving away from Earth?
Cosmic Microwave Background
Redshift
Light Element Abundance
In a chemical reaction, nothing is lost, nothing is gained. It's the Law of Conservation of Mass! Everything just changes forms! So, if we mix 24 g of magnesium with 38 g of fluorine it will produce magnesium fluoride. So cool! How many grams will be produced?
10
24
14
62
A chemical reaction occurs with 88 g of strontium reacts with 160 g of bromine. This will produce _______ g of strontium bromide.
72
240
248
80
Its fancy name is dihydrogen monoxide, and it can kill you if inhaled. We mostly call it water! It has a simple chemical formula containing 3 atoms: H2O. Sucrose is a form of sugar and has the formula C12H22O11 . How many atoms are in a molecule of sucrose?
44 atoms total
37 atoms total
45 atoms total
3 atoms total
