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WorksheetsSCI10 Astronomy Revision
Total questions: 46
Worksheet time: 55mins
What is the first phase in the life cycle of a star?
nebula
protostar
main sequence star
white dwarf
Once a star uses up all of the _________ in its core, the star will expand into a giant or supergiant
light
heat
energy
hydrogen
What determines if a star becomes a giant or a supergiant?
star mass
star temperature
star color
star luminosity
After a low mass star sheds its outer layers into a planetary nebula, it leaves behind its core, called a
White Dwarf
Neutron Star
Protostar
Zero-age main sequence
How do star clusters form?
by nebulae in interstellar space
by a congregation of mass through black holes
through massive shock waves
through worm holes in space/time
What is the doppler effect?
a change in the frequency of sound, light or other waves to cause a change in pitch
A change in pitch that causes frequency, sound, light and other waves to disappear
I have no idea
A change in sound that alters frequency
when a noise if moving away from an observer...
the pitch is lower
the pitch is higher
the noise is smoother
the energy is lower
when the frequency is higher what happens to the wavelength?
the wavelength gets longer
The wavelength gets shorter
the wavelength doesn't change
I have no idea
When pitch is lower what is happening to the frequency?
the pitch crescendos
It is unchanged
None of these
It is also lower
What is Redshift
Objects move away us, give off red light
Objects move towards us, give off blue light
Objects move towards us, give off red light
Objects move away us, give off blue light
What is Blueshift
Objects move away us, give off red light
Objects move towards us give off blue light
Objects move away us, give off blue light
Objects move towards us, give off red light
What is the time interval between waves passing called?
frequency
pitch
period
wavelength
As galaxies move away from our galaxy
a shift on the electromagnetic spectrum
(EMS) is noticed. This phenomena is
called _____________.
redshift
blueshift
unshift
blackshift
How does Cosmic Microwave Background Radiation support the Big Band Theory?
Microwaves are found everywhere in the universe.
Microwaves occurred at the time of the Big Bang
Microwaves are useful in our everyday lives
Only A & B
How does the abundance of hydrogen and helium support the Big Bang Theory.
Hydrogen and helium are elements on the Periodic Table
Hydrogen and helium are in the same ratio throughout the universe.
Hydrogen and helium have many current uses today
sort of cool, dim (not too much light), and red?
Which area of the diagram represent the white dwarfs?
Area M
Area X
Area P
Area Z
Which area represents Supergiants?
Area Z
Area P
Area M
Area X
Which area represents main-sequence?
Area Z
Area P
Area X
Area M
Which area represents Giants?
Area P
Area Z
Area X
Area M
Cosmic Microwave Background Radiation is a form of _________.
Matter
Electromagnetic Radiation
gravitational waves
Water
Why is the light from distant galaxies red-shifted?
They produce more red light than nearby galaxies
They are moving away from us
The longer wavelengths are filtered out more by dust
They are moving toward us
What happens to the wavelengths of energy if they are moving AWAY from a source?
The waves stretch out and get longer.
The waves compress and get shorter.
What is CMB?
electromagnetic atoms
radiation that fills the universe and can be detected in every direction
a faint glow of light that fills the universe
entire universe
CMB existed before the big bang?
True
False
