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Test: Stars & The Universe - Year 11 MCQ


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10 Questions MCQ Test Physics for GCSE/IGCSE - Test: Stars & The Universe

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Test: Stars & The Universe - Question 1

What types of radiation are emitted by the Sun?

Detailed Solution for Test: Stars & The Universe - Question 1
The Sun emits many kinds of radiation - not just the light that we can see. We can look at the Sun with special telescopes designed to see different wavelengths of light
Test: Stars & The Universe - Question 2

What is blueshift?

Detailed Solution for Test: Stars & The Universe - Question 2
Each new wave is emitted from a point a little closer than if the object was stationary so the wavelength appears to be shorter than it would have been
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Test: Stars & The Universe - Question 3

If scientists find new evidence that doesn’t support the Big Bang Theory, what should other scientists do?

Detailed Solution for Test: Stars & The Universe - Question 3
This is the scientific method
Test: Stars & The Universe - Question 4
How long does it take the light from the sun to reach us?
Detailed Solution for Test: Stars & The Universe - Question 4
Due to the distance between us and the Sun and the fact that light travels at 3 x 108 m/s, it takes around 8 minutes for the light emitted by the Sun to reach us
Test: Stars & The Universe - Question 5
How do we know black holes exist if we cannot see them?
Detailed Solution for Test: Stars & The Universe - Question 5
The idea of black holes was first suggested in 1916 by a scientist called Scwarzchild
Test: Stars & The Universe - Question 6
The shift seen when an object is moving towards us is not red, it is …
Detailed Solution for Test: Stars & The Universe - Question 6
The faster the object is approaching, the greater the blueshift
Test: Stars & The Universe - Question 7
What happens to the wavelength of light from stars that are moving away from us?
Detailed Solution for Test: Stars & The Universe - Question 7
Each successive light wave crest or trough starts from a little further away than it would have done if the star was stationary so the wavelength is a little longer
Test: Stars & The Universe - Question 8
The faster a star or galaxy is moving (relative to us), we say that the redshift is …
Detailed Solution for Test: Stars & The Universe - Question 8
The light waves are 'stretched' more by faster moving objects
Test: Stars & The Universe - Question 9
How do we know that the Universe is currently expanding?
Detailed Solution for Test: Stars & The Universe - Question 9
When an object moves away from an observer, the waves that the object emits have a longer wavelength due to the speed of the object. Using this fact we can see that distant objects are moving away
Test: Stars & The Universe - Question 10
"In space no one can hear you scream" was a famous movie quote, but is that actually true and why?
Detailed Solution for Test: Stars & The Universe - Question 10
Sound is a longitudinal wave and requires a material medium so you could not hear a scream directly in space. Electromagnetic radiation can travel through a vacuum so if the person screaming had their communications radio switched on, you would be able to hear their scream. Assuming the spacesuit of the person screaming was still pressurised, if you touched your helmet to theirs, you could hear them scream. But how would that work? And would you really want to be that close ... it could be your turn next!
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