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WorksheetsYear 10 Cosmology Review 1
Total questions: 15
Worksheet time: 9mins
Who confirmed Democritus' theory that the milky way was made up of distant stars?
Einstein
Galileo
Isaac Newton
Richard Feynman
Which are the correct dimension currently estimated for the Milky Way?
200-400 million stars and 100,000 million light years across
2-4 million stars and 100 light years across
200-400 billion stars and 100,000 light years across
200-400 million stars and 100,000 light years across
what is useful about at Cepheid variable star?
very large
very small
variable brightness
constant brightness
How do astronomers use Cepheid Variables?
to measure distances to other galaxies
to measure the brightness of stars
to measure the size of stars
to measure the distance between planets
The steady ---------------- theory suggested that the universe is infinite in extent and has always existed in the same form as observed today.
(a)
A peice of evidence for the this theory is that....
galaxies don't seem to move
galaxies are spread relatively evenly across space
galaxies are all the same age
galaxies spin on their axes
Edwin Hubble first discredited this theory by showing that-------------------------------------------
(a)
Hubble showed this by measuring the...
mass of other galaxies
the red-shift of light from other galaxies
gravitational waves from other galaxies
number of black holes
Which of these is NOT evidence for the Big Bang theory?
the detection of cosmic microwave radiation
the detection of cosmological redshift
the detection of dark matter
the discovery that galaxies are accelerating away from each other
True or false: the expansion of the universe can be thought of as stars and galaxies expanding into space
true
false
When the Universe was a tiny dot it would’ve been unimaginably, ___
highly blueshifted
highly redshifted
chillingly cold
hellishly hot
The sudden expansion of the Universe from a dense point was coined “the Big Bang” by which astronomer?
Arno Penzias
Fred Hoyle
Robert Wilson
Edwin Hubble
Visible light from the early Universe that reaches us billions of years later should be ___
redshifted into microwave wavelengths
blueshifted into x-ray wavelengths
redshifted into infrared wavelengths
blueshifted into ultraviolet wavelengths
From any galaxy, it looks like all the others are ___
contracting
expanding
rushing towards you
rushing away from you
Currently, the best measurement we have of the age of the Universe is ___
13.82 million years
312.8 million years
13.82 billion years
312.8 billion years
