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WorksheetsUnit 1: Discovering New Worlds Review
Total questions: 77
Worksheet time: 40mins
What is the primary energy source of stars?
Nuclear fusion
Gravity
Rotation
Revolution
Which diagram shows the relationship between the surface temperature and the luminosity of stars?
H-R diagram
Oort cloud
Kuiper belt
Asteroid belt
What term describes a star’s true brightness irrespective of the distance?
Absolute brightness
Apparent brightness
Super force
Satellite
What is the region beyond Neptune that consists of icy bodies called?
Kuiper belt
Asteroid belt
Oort cloud
Goldilocks zone
What is the approximate distance between Earth and the Sun called?
Astronomical Unit
Light-year
Orbit
Revolution
What is the path that an object takes around another object in space called?
Orbit
Rotation
Revolution
Satellite
What is also known as the habitable zone in the Solar System?
Goldilocks zone
Terrestrial planets
Gas giants
Oort cloud
Which planets are also known as rocky planets?
Terrestrial planets
Gas giants
Satellites
Planets
What is the force that holds all objects in place in our Solar System?
Gravity
Super force
Rotation
Revolution
What is a collection of gases, dust, and billions of stars called?
Galaxy
Constellation
Asteroid belt
Star
What is a set of stars with a recognized pattern in the sky called?
Constellation
Asterism
Star
Satellite
What is a smaller pattern of stars in a constellation called?
Asterism
Nucleosynthesis
Satellite
Planet
What term refers to the movement around an orbit of the planets and other celestial bodies?
Revolution
Rotation
Orbit
Nucleosynthesis
What is the distance light travels in one Earth year called?
Light-year
Astronomical Unit
Orbit
Satellite
What is the region beyond Pluto’s orbit where long-period comets originate?
Oort cloud
Kuiper belt
Asteroid belt
Goldilocks zone
Which of the following is not found in our Solar System?
asteroid
comet
exoplanet
meteor
Which object in our Solar System has the strongest gravitational force?
Jupiter
Mercury
Sun
Venus
What happens to the gravitational force between the Sun and the planet as the distance between them increases?
it increases
it decreases
it remains the same
it becomes negligible
To what galaxy does our Solar System belong?
Andromeda
Large Magellanic Cloud
Milky Way
Small Magellanic Cloud
Which of the following is not a criterion for a celestial object to be categorized as a planet?
It should orbit a star.
It should be able to generate its energy.
It should be big enough to have enough gravity to force it into a spherical shape.
It should be able to clear away any other objects of similar size near its orbit.
Which is a Jovian planet?
Earth
Mars
Mercury
Neptune
Where is the asteroid belt located?
between Earth and Mars
between Mars and Jupiter
between Mercury and Venus
between Neptune and Pluto
Which is also known as the North Star?
Altair
Antares
Polaris
Vega
Which statement describes circumpolar constellations?
These are constellations that are seen year-round.
These are constellations that are yet to be discovered.
These are constellations that are seen in a specific season.
These are constellations that are seen in a specific location only.
Which characteristic of a star usually determines its life span?
brightness
color
distance
size
Which color of the star is the hottest?
blue
orange
red
yellow
What is the correct sequence of stars from smallest to biggest?
neutron → white dwarf → giant → supergiant
white dwarf → neutron → supergiant → giant
neutron → giant → white dwarf → supergiant
supergiant → giant → white dwarf → neutron
In the Hertzsprung-Russel diagram, to what category does our Sun belong?
giants
main sequence
supergiant’s
white dwarfs
To what type of galaxy is the Milky Way categorized?
elliptical
irregular
satellite
spiral
Which of the following statements is true about the Sun?
The Sun is a typical blue dwarf star.
The Sun is the largest object within our Solar System.
The Sun is located at the edge of our Solar System.
The Sun has a solid surface.
What percentage of the Solar System’s mass is attributed to the Sun’s presence?
About 10%
About 50%
About 99.8%
About 75%
Which part of the Sun acts as a nuclear reactor producing its enormous energy?
The corona
The core
The photosphere
The sunspots
Which of the following statements about the Sun is FALSE?
The Sun does not have a solid surface.
The Sun’s core acts as a nuclear reactor.
The Sun is a typical blue dwarf star.
The photosphere is the outermost layer of the Sun’s atmosphere.
Which planet is known as the Red Planet?
Venus
Mars
Jupiter
Mercury
Which planet is the smallest in the Solar System?
Mercury
Mars
Earth
Neptune
Which planet is known as Earth’s twin due to its similar size and structure?
Mars
Venus
Jupiter
Saturn
Which planet is the largest in the Solar System?
Earth
Saturn
Jupiter
Uranus
Which planet is the only one known to have life?
Mars
Earth
Venus
Mercury
Which planet is nearest to the Sun and has the fastest revolution of all planets?
Mercury
Venus
Mars
Neptune
Which planet is the farthest from the Sun?
Uranus
Neptune
Saturn
Jupiter
Which planet is known for its unique rotation, appearing to roll rather than spin?
Uranus
Saturn
Mars
Venus
Which planet is popularly known for its beautiful rings, which are made up of ice and rocks?
Saturn
Mars
Venus
Mercury
Which planet's thick atmosphere traps heat from the Sun, making it the hottest planet in the Solar System?
Venus
Earth
Jupiter
Neptune
What is also known as a minor planet?
Asteroid
Comet
Meteoroid
Moon
Which of the following is an icy body that releases gas or dust?
Comet
Asteroid
Meteoroid
Planet
What is a boulder floating in space called?
Meteoroid
Asteroid
Comet
Satellite
Which object usually originates from the Kuiper Belt or Oort Cloud?
Comet
Asteroid
Meteoroid
Planet
Where is a huge collection of asteroids found in the Solar System?
Between the orbits of Mars and Jupiter
Between the orbits of Earth and Venus
In the Kuiper Belt
In the Oort Cloud
Which object is also known as a dirty snowball?
Comet
Asteroid
Meteoroid
Moon
Which object does not remain in a certain region in the Solar System?
Comet
Asteroid
Planet
Moon
What comprises a nucleus, coma, and tail?
Comet
Asteroid
Meteoroid
Planet
Which object is often called a "space rock"?
Meteoroid
Asteroid
Comet
Planet
How are meteoroids classified?
According to composition or location
By their color
By their speed
By their size only
What makes stars different from other celestial bodies?
They produce their own light and energy.
They orbit planets.
They are always smaller than planets.
They are made entirely of rock.
How do scientists categorize stars?
By their color, size, and brightness.
By their distance from Earth only.
By the number of planets they have.
By their ability to support life.
What does the color of a star indicate?
Its temperature.
Its distance from Earth.
Its age.
Its shape.
What is the difference between absolute brightness and apparent brightness?
Absolute brightness is the true brightness of a star; apparent brightness is how bright it appears from Earth.
Absolute brightness is how bright a star looks from Earth; apparent brightness is its true brightness.
Absolute brightness is measured in kilometers; apparent brightness is measured in miles.
Absolute brightness refers to the color of a star; apparent brightness refers to its size.
What does the size of a star indicate?
Its mass and stage in its life cycle.
Its distance from the Sun.
Its ability to support planets.
Its color.
Which type of galaxy is described as a rotating disk of stars and dust?
Spiral
Elliptical
Irregular
Lenticular
Which type of galaxy possesses little gas and dust and includes older stars that are not actively forming stars anymore?
Spiral
Elliptical
Irregular
Barred Spiral
Which type of galaxy is neither disk-like nor elliptical?
Spiral
Elliptical
Irregular
Dwarf
Which of the following is the correct sequence for the life cycle of a low-mass star?
Nebula → Protostar → Red Giant → Planetary Nebula → White Dwarf → Black Dwarf
Nebula → Protostar → Supergiant → Supernova → Neutron Star
Nebula → Protostar → Supernova → Black Hole
Nebula → Red Giant → Supergiant → Black Hole
Which of the following is a possible final stage in the life cycle of a massive star?
Black Hole
Planetary Nebula
White Dwarf
Black Dwarf
Which type of galaxy has lots of gas and dust and many young stars, making it one of the brightest in the universe?
Elliptical galaxy
Irregular galaxy
Spiral galaxy
Dwarf galaxy
Which type of galaxy has very little dust but lots of bright young stars?
Elliptical galaxy
Spiral galaxy
Irregular galaxy
Barred spiral galaxy
Which type of galaxy is a collection of stars and dust with no definite shape?
Spiral galaxy
Elliptical galaxy
Irregular galaxy
Lenticular galaxy
Which type of galaxy has a shape that varies from nearly circular to very elongated shapes?
Elliptical galaxy
Spiral galaxy
Irregular galaxy
Ring galaxy
Which type of galaxy has several arms that branch out of the center, making it appear like a pinwheel?
Elliptical galaxy
Spiral galaxy
Irregular galaxy
Dwarf galaxy
What is the Goldilocks zone?
The area in a galaxy with the most stars
The region around a star where conditions are just right for life
The coldest part of a planet
The center of a black hole
Why is life possible on a planet that resides in the Goldilocks zone?
It is the closest to the sun
It has extreme temperatures
It has conditions suitable for liquid water and life
It is the largest planet in the system
Which of the following is NOT a condition necessary for life to thrive on a planet?
Presence of liquid water
Suitable temperature range
Lack of atmosphere
Availability of essential chemicals
Which of the following best describes how the presence of an atmosphere supports life on a planet?
It blocks all sunlight
It provides oxygen and protects from harmful radiation
It makes the planet heavier
It causes the planet to spin faster
What are exoplanets?
Planets that orbit stars outside our solar system
Moons that orbit planets in our solar system
Asteroids found between Mars and Jupiter
Comets that travel through the solar system
Why do scientists continue to explore and discover exoplanets?
To find new types of minerals for mining
To learn more about the possibility of life beyond Earth
To discover new moons for our solar system
To measure the distance between stars
Which type of star has low temperature and high luminosity?
Blue Giants
Red Giants
White Dwarfs
Red Supergiants
Which category of stars are very hot, but not very bright?
Blue Giants
Red Giants
White Dwarfs
Red Supergiants
Which star is considered a supergiant?
Sirius B
Sun
Betelgeuse
Van Maanan's Star
