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Earth Science - Unit 1 Review Flashcards | StudBud
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Earth Science - Unit 1 Review
Earth Science - Unit 1 Review
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A review of our Unit 1 topic "Stars & Galaxies"
Flashcards
50 cards
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Practice quiz
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Host live
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Questions
50
Answers
1
What is the main factor that predicts how a star will die?
Its size
Its starting mass
The type of star
The number of planets it has
2
If point 3 represents a star, at which point will the planet's orbital speed be greatest?
2
1
3
3
What did scientists discover about the inflation of the universe?
It is expanding at a decelerating rate
It is expanding at an accelerating rate
It was expanding but is now shrinking
It is expanding at the same rate
4
The size of the universe…
Fluctuates
Is infinite
Has not changed
Is expanding
5
Which of the following is the closest wavelength to violet?
400 nm
200 nm
800 nm
600 nm
6
What is the main reason that mass decreases in a star?
Nuclear fusion converts some mass into energy
The star went on a diet
Gravity cannot hold on to it forever
Some mass disappears into a black hole
7
What does "falsifiable" mean?
Something that could be disproven
Something that cannot be proven right or wrong
Something that cannot be tested
Something that cannot be proven right
8
What do you call a rapidly spinning star that emits pulses of electromagnetic radiation?
White dwarf
Pulsar
Quasar
Neutron star
9
Where are stars born?
Between groups of planets
A planetary nebula
A stellar nebula
The cores of other stars
10
Parallax is used to determine a star's...
temperature
brightness
composition
distance from Earth
11
What is Kepler's 3rd law?
Planets are made of minerals
A planet's orbit is elliptical
A planet's speed changes during its orbit
A planet's orbital period depends on the distance from the sun
12
Which of the following points represents the
perihelion
of a planet's orbit?
2
1
3
13
In what stage of a star's life cycle are gravity and fusion kept at equilibrium?
Main Sequence
Red Giant
Protostar
White Dwarf
14
The doppler effect causes the _______ of a sound to change as the source moves past us.
Amplitude
Volume
Pitch
Color
15
When a massive star's core becomes all iron, it
collapses into a white dwarf because fusion has stopped.
expands until the star becomes a red giant.
expands into a neutron star.
collapses then bounces back in a supernova explosion.
16
What evidence for the BBT gives us the best guess at the AGE of the universe?
Cosmic microwave background radiation
Red-shift of light from distant objects
The Doppler effect
Ratio of hydrogen to helium is 3:1
17
Frequency is measured in __________.
Nanometers
Nanoseconds
Lightyears
Hertz
18
Which of the following definitions of a planet does Pluto break?
It must be the only large object in its orbit
It must have gravity
It must orbit the sun
It must be spherical
19
What happens when a star begins to run out of hydrogen for fuel?
It becomes a red giant
It triggers a supernova
It collapses into a neutron star
It creates more through fusion
20
Which of Kepler’s laws describes the shape of an object's orbit?
3rd
2nd
4th
1st
21
An exoplanet can be detected by the ________ of the star it is thought to orbit.
explosion
wobble
rotation
apparent magnitude
22
A small star…
Creates heavier elements
Has a stronger gravitational pull
Has a longer lifespan
Releases more energy
23
The Big Bang Theory predicts that the universe began _________ years ago.
150 million
8 billion
14 billion
21 billion
24
The color of a star is closely related to…
Its brightness
Its elements
Its temperature
Its age
25
What can scientists learn from the 'wobble' of a distant star?
How much mass is in the orbiting planet(s)
How eccentric the orbit is
What materials are in the star
How large a star is
26
What color is associated with a longer wavelength?
Green
Red
Violet
Yellow
27
Which of the following points represents a
focus
of the planet's orbit?
2
3
1
28
What kind of nucleosynthesis happens during fusion?
Elements are compressed into subatomic molecules
Heavy elements decay into lighter elements
Light elements combine into heavier elements
New elements are created from subatomic molecules
29
How big are neutron stars?
A few miles
The size of earth
1/10th the size of our sun
The size of BCHS
30
Which of the following elements was one of the first to form after the Big Bang?
Oxygen
Carbon
Neon
Helium
31
What do you call the distance from a star that hydrogen gas begins to condense?
The habitable zone
The hydrogen region
The frost line
The orbital radius
32
Which type of galaxy consists of the oldest stars?
Lenticular
Spiral
Elliptical
Irregular
33
What do you call the region around a star that liquid water might form in?
The water zone
The orbital radius
The habitable zone
The frost line
34
How many stars in the sky are main sequence stars?
74%
94%
25%
4%
35
Exoplanets are often discovered when a planet passes in front of its star. This method of detection is called...
radial velocity
transit
'wobble'
shadow watching
36
Which of the following would increase an object's gravity?
Increasing the distance
Increasing its size/volume
Increasing the force of nuclear fusion
Increasing its mass
37
Which of Kepler's Laws is this illustration describing?
2nd Law
4th Law
3rd Law
1st Law
38
What happens to matter that "falls" into a black hole?
It's crushed into subatomic parts
It teleports to other places in the universe
It experiences time and space differently
It travels back in time
39
What do scientists look for to determine if a distant exoplanet is terrestrial (rocky)?
volume
brightness
color
density
40
Which of the following is NOT something scientists can determine by watching an exoplanet pass in front of its star?
The planet's orbital period
The planet's mass
The planet's orbital distance/radius
The planet's size/volume
41
Scientists can determine the elements that make up a star by looking at ____________.
Absorption lines
Movement
Gravitational pull
Their orbits
42
What kind of stars will always end with a supernova explosion?
White dwarf
Stars with a lot of mass
Stars with low gravity
Red giants
43
As the wavelength of an object increases…
Frequency decreases
Pitch increases
Frequency increases
Volume increases
44
Wavelength is measured in __________.
Nanoseconds
Nanometers
Lightyears
Hertz
45
Which type of galaxy is often categorized by a bluish glow of hot gases?
Lenticular
Irregular
Elliptical
Spiral
46
A Hertzsprung-Russel diagram is a graph of which variables:
Temperature and mass
Temperature and brightness
Brightness and mass
Mass and time
47
Which of the following are all considered Jovian planets?
saturn, uranus, neptune
venus, uranus, neptune
jupiter, earth, mars
mercury, venus, mars
48
What do you call the orbital point that is farthest from the sun?
Heliocentric
Perihelion
Ecliptic
Aphelion
49
What range of the electromagnetic spectrum does the Hubble Space Telescope measure?
X-rays
Radio waves
Visible light
Gamma radiation
50
What was Edwin Hubble's great discovery?
Distant objects in space were moving away from us
E=mc2
Cosmic microwave background radiation
The presense of nebulae
