WorksheetsDCA 4 Universe
Total questions: 40
Worksheet time: 22mins
Why do stars look brighter or dimmer in the sky?
Age of the Star
Orion has the brightest stars
distance - you can't tell how far away stars are when looking from Earth
Tha shape of the Star.
Astronomers observed a bright object with a fan-shaped tail.
comet
An asteriod
A meteor
A nebula
Regulus is a star with a temperature of 10,300 K what spectral does Regulus belong to?
Spectral class O
Spectral class B
Spectral class A
Spectral class M
What is the correct order of the visible light spectrum starting with the longer wavelength?
Red, yellow, orange, blue, violet, indigo
Violet, indigo, blue, green, yellow, orange, red
Green, yellow, blue, indigo, red, orange
Red, orange, yellow, green, blue, indigo, violet
Scientists observed a celestial object emitting a wavelength of 3 x 10-10m. What type of telescope did the scientists have to use to view this?
Radio wave
Infrared ray
X-ray
Gamma Ray
Scientists observed a celestial object emitting waves with a frequency of 1.41 x 108 Hz. What type of telescope did the scientists have to use to view this object?
Radio wave
Microwave
X-ray
Ultraviolet wave
The Sun is a medium-star and many stars are bigger and brighter. When looking through a telescope why do the other stars seem more dim than the Sun?
Yellow is more visible than other colors
The Sun is closer than the other stars
They are made up of different gases
light from stars travels through space and is reflected
True or False
When compared to the Sun, Star W has a lower luminosity?
True
False
True or False?
When compared to the Sun, Star W has a greater surface temperature.
True
False
Star W is classified as what kind of star?
Main Sequence
Giant
Supergiant
White Dwarf
On the HR Diagram the Sun is classified as?
Main Sequence
Giant
Supergiant
White Dwarf
Which 2 stars have a surface temperature and luminosity lower than our Sun?
Mira
Alpha Centauri B
Bernard's Star
Betelgeuse
Zeta Eridani
A star that is dimmer than the Sun with a temperature higher than 10,000K would be classified as
A main sequence star in spectral class G
A supergiant in spectral class K
A main sequence star in spectral class K or M
A white dwarf in spectral class B
A star that is brighter than the Sun with a temperature lower than 5,000K would be classified as
A main sequence in spectral class B
A supergiant in spectral class K
A main sequence in spectral class K or M
A white dwarf in spectral class B
A star was discovered that is brighter and hotter than the Sun. Why does the Sun appear to be brighter than the newly discovered star?
Different Colors
The Sun is older
The Sun is closer to Earth
The Sun is made of different elements
Which of these correctly compares the masses of the different objects in the universe?
A moon has less mass than a star and more mass than the planet it orbits
A planet has less mass than a galaxy and more mass than the star it orbits
A galaxy had less mass than a moon and more mass than a planet
A star has less mass than a galaxy and more mass than a planet
A telescope was picking up wave frequency of 14.1 x 109. What type of waves were being picked up?
(a)
How does Star 1 compare to Star 2?
Star 1 is cooler and less bright than Star 2
Star 1 is hotter and brighter than Star 2
Star 1 is cooler and brighter than Star 2
Star 1 is hotter and less bright than Star 2
Which of the following correctly describes a Nebula?
A collection of hot gases that sometimes produces light from nuclear reactions
A collection of hot gases that results from stars that have exploded
A collection of dust and gases that forms stars or results from dying stars
A collection of dust and gases that is found near stars
Which of the following correctly describes a Star?
A sphere of dust and gases that contains many elements and produces light from fusion and fission reactions
A collection of gases from several nebulae hot enough to cause a nuclear reaction
A sphere of matter with a density and a temperature great enough to cause a nuclear reaction at its center
A collection of hot gases that forms a sphere but produces no light
Which type of star belong to spectral class B and have the lowest luminosity?
Main Sequence
Giants
White Dwarfs
Supergiants
Which type of stars would belong to spectral class M and have the highest luminosity?
Main Sequence
Giants
White Dwarfs
Supergiants
Which describes the position of the Sun relative to other objects in space? Pick 2.
In a spiral arm of the Milky Way galaxy
Halfway between Venus and Jupiter
At the center of our solar system
At the center of the Milky Way galaxy
Further from Earth than any other star
What holds everything in the galaxy?
(a)
Why can't people on Earth see the Milky Way galaxy?
More stars exist outside of the galaxy
Earth is a part of the Milky Way galaxy
Our solar system is in the center of the galaxy
The center of the galaxy is a dense cluster of stars
Why do scientist use the electromagnetic spectrum to study space?
Visible light is all we need to learn about the objects
observations is different wavelengths provides different information about the stars
the equipment is too expensive
visible light only provides information about objects close to Earth
The diameter of the Sun would place it between?
LGM-1 and Gliese 229 B
Gliese 229 B and Proxima Centauri
Proxima Centauri and Arctutrus
Arcturus and Betelgeuse
Which of the following correctly places these in order from LARGEST to SMALLEST?
galaxy -- local group/cluster -- planet -- solar system -- universe
universe -- local group/cluster -- galaxy -- solar system -- planet
planet -- solar system -- galaxy -- local group/cluster -- universe
universe -- galaxy -- solar system -- local group/cluster -- planet
A galaxy which is either spherical (ball like) or a flattened disk is a ___ galaxy.
elliptical
humanoid
irregular
spiral
An explosion that occurs at the end of a stars life cycle is known as:
Superior Star
White Dwarf
Supernova
Neutron star
A galaxy that does not have a regular shape?
Spiral
Elliptical
Irregular
Quasar
What Galaxy is Earth located?
Andromeda
Milky Way
Sagittarius
Snickers
What unit is used to measure distances in space?
Light year
Kilometer
Miles
Solar unit
What shape is our galaxy?
oval
spiral
egg
square
Is the sun at the center of our galaxy?
Yes
No
