Galaxies and the Universe
Physics ⇒ Earth and Space Physics
Galaxies and the Universe starts at 9 and continues till grade 12.
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See sample questions for grade 12
Describe the difference between dark matter and dark energy.
Describe the main difference between elliptical and spiral galaxies.
Describe what is meant by the term 'look-back time' in astronomy.
Explain what is meant by the term 'cosmic microwave background radiation'.
Explain why the night sky is dark, even though there are billions of stars in the universe (Olbers' Paradox).
Name the galaxy that is closest to the Milky Way.
The redshift of light from distant galaxies is evidence for which phenomenon?
Explain why the night sky is dark, even though there are billions of stars in the universe (Olbers' Paradox).
Which element was formed in the greatest abundance during the Big Bang nucleosynthesis? (1) Helium (2) Carbon (3) Oxygen (4) Iron
Which law relates the velocity of a galaxy to its distance from Earth? (1) Kepler's Law (2) Hubble's Law (3) Newton's Law (4) Ohm's Law
Which of the following best describes a galaxy? (1) A large group of stars, gas, and dust bound together by gravity (2) A single star with planets (3) A cluster of planets without stars (4) A cloud of gas only
Which of the following best describes a supercluster? (1) A group of stars (2) A group of galaxies (3) A group of galaxy clusters (4) A group of planets
Fill in the blank: The _______ is the region at the center of a galaxy where a supermassive black hole is often found.
Fill in the blank: The force that holds stars together in a galaxy is _______.
Fill in the blank: The process by which elements heavier than hydrogen are formed in stars is called _______.
The Milky Way is classified as a _______ galaxy.
True or False: All galaxies contain billions of stars.
True or False: Dark matter can be directly observed with telescopes.
True or False: Most of the mass in galaxies is made up of visible stars and gas.
True or False: The Local Group is a cluster of galaxies that includes the Milky Way.
