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RRISD Grade 8 Science Review on Components of the Universe Flashcards | StudBud
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RRISD Grade 8 Science Review on Components of the Universe
RRISD Grade 8 Science Review on Components of the Universe
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science review, universe, middle school #middleschoolscience #universe
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1
Which electromagnetic wave has the highest frequency and is often emitted from black holes?
ultraviolet
infrared
visible light
gamma
2
Which unit would you use to best measure distances between galaxies?
Astronomical Unit
kilometer
meter
light year
3
Energy is transferred from the Sun to Earth mainly by ___________________.
electromagnetic waves
density currents
red shifts
molecular collisions
4
Which of the following planets was first discovered using a telescope?
Uranus
Venus
Saturn
Jupiter
5
By studying the light from stars in distant galaxies, scientists know that _________________.
objects in the universe are moving apart
the sun is still the center of the universe
the universe has not changed over time
all objects in the universe are the same distance apart
6
Which unit would you use to best measure distances in our solar system?
Astronomical Unit
light year
meter
kilometer
7
What is the next step in the life cycle of a super high mass star after a main sequence?
black hole
neutron star
white dwarf
super nova
8
What planet in our solar system has the strongest gravity?
Neptune
Venus
Jupiter
Mercury
9
Which color of stars have the highest surface temperature?
white
yellow
red
blue
10
Which of the following best explains why stars are different colors?
the stars are in different galaxies
the stars are different distances away
the stars have different numbers of planets orbiting them
the stars are at different stages in their life cycles
11
What is the relationship between surface temperature and brightness of a Main Sequence star?
as temperature increases, brightness stays the same
when temperature remains the same, brightness increases
as temperature increases, brightness decreases
as temperature increases, brightness increases
12
Which statement best describes the Earth's sun?
It's a red giant that will soon become a black dwarf.
It's the glowing remains of an older, dying star.
It's a collection of stars held together by gravity.
It's average in terms of size and temperature.
13
How far is the Sun from Earth?
about 1 light year
about 8.3 light years
much less than one light year
more than 160 light years
14
What is the primary factor that determines which path stars take on the life-cycle diagram?
nuclear fusion
gravity
mass
chemical compostion
15
Which of these statements best supports the Big Bang theory?
Sun contains most of the mass that makes up the Solar System
galaxies show a red shift, indicating they are moving away
the 3 types of galaxies are spiral, ellipitical, & irregular
the North Pole of Earth points to Polaris, the North Star
16
In the diagram below, which type of wave has the most energy?
infrared
ultraviolet
visible
radio
17
Which cat?
Grumpy Cat
Cat in the Hat
Garfield
Hello Kitty
18
What type of galaxy is our Milky Way galaxy?
elliptical
groovy
spiral
irregular
19
What snail species is this?
burgundy snail
brown garden snail
garlic glass snail
rosy wolf snail
20
What information can astronomers obtain from spectrographs about stars?
size and distance
chemical composition and distance
temperature and chemical composition
temperature and distance
21
Which star is the hottest?
Deneb
Spica
Polaris
Betelgeuse
22
If a star's light takes 600 years to reach the Earth, we know the star is ____________.
showing a red shift
600 light years away
moving away from us
moving towards us
23
Which country does this flag represent?
Poland
Greenland
Indonesia
Monaco
24
How do the wavelengths and energy of infrared waves and x-ray waves compare?
infrared has longer wavelengths and higher energy than x-ray
infrared has shorter wavelengths and lower energy than x-ray
infrared has longer wavelengths and lower energy than x-rays
infrared has shorter wavelength and higher energy than x-ray
25
In what way is the life cycle of stars a "cycle?"
supernovas give off dust and gas, eventually forming nebula
the number of stars in universe is constant
black holes cause compression of matter and form new stars
all types of stars follow a predictable pattern of change
26
Which star is the coolest?
Deneb
Sirius B
Polaris
Betelgeuse
27
Where would you find our solar system in the Milky Way galaxy?
it changes year to year
near the center of the Milky Way
halfway between the center and edge of Milky Way
on the outermost arm of one of spirals
28
Studying red shift is important to astronomers because it provides evidence that __________.
the universe is expanding
the light year is a useful unit
the Sun is a star
the planets are rotating
29
Why does the sun appear larger than other stars?
high temperature
chemical composition
yellow color
its close distance to Earth
30
What is the correct order of the electromagnetic spectrum from highest to lowest frequency?
radio, microwave, infrared, ultraviolet, gamma
gamma, x-ray, UV, visible, infrared, microwave, radio
gamma, x-ray, ultraviolet, infrared, microwave, radio
radio, microwave, infrared, visible, UV, x-ray, gamma
31
What do all galaxies have in common?
they are made of stars
they travel around the sun
they are the same distance from Earth
they are the same shape
32
What type of galaxy is pictured below?
irregular
ellipitical
spiral
snazzy
33
In the visible light spectrum, which color has the lowest frequency?
green
violet
blue
red
34
Spiral galaxies contain which of the following?
all of the above
areas of new star formation
no gas and dust
mainly old stars
35
What type of galaxy is pictured below?
ellipitical
irregular
spiral
far out
36
Scientists believe that before the "Big Bang" the matter that makes up the universe __________.
did not exist
was located where it is today
was spread far apart
was packed tightly together
37
Which of the following best describes the composition of a nebula such as the Crab Nebula?
planets and moons
clouds of dust and gas
large asteriods
ice crystals
38
Which group, on the HR Diagram, does our Sun belong to?
giants
super giants
white dwarfs
main sequence
39
The distances between objects in the universe are measured in light years because ___________.
many objects in the universe radiate light seen from Earth
only waves, such as light, can travel in a vaccuum
many objects are in close proximity to Earth
other units result in values that are impractical and large
40
Which star is the brightest?
Vega
Deneb
Sirius B
Sun
41
In the diagram below, which number represents the wavelength?
1
2
4
3
42
Betelgeuse is 640 light years away. If it explodes (supernova), how soon will scientists know?
when the Sun is low on the horizon
between 4 am and 6 am
1000 years from now
640 years from now
43
A star is very bright, but has a low temperature. Where would you find it on the HR Diagram?
Main Sequence
super giants
giants
white dwarfs
44
Which dog?
Snoopy
Underdog
Pluto
Scooby
45
Which electromagnetic wave has the longest wavelength and is used to explore the universe?
ultraviolet
gamma
infrared
visible light
