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 11
Describe the role of gravity in the formation and evolution of galaxies.
Describe what is meant by a light-year.
Describe what is meant by the term 'cosmic microwave background radiation'.
Explain the difference between a galaxy cluster and a supercluster.
Explain the difference between a spiral galaxy and an elliptical galaxy.
Explain the significance of redshift in the study of galaxies.
A student reads that the Andromeda Galaxy will collide with the Milky Way in about 4 billion years. Is this statement true or false?
Context: Astronomers observe two galaxies, A and B. Galaxy A is 100 million light-years away and appears twice as bright as Galaxy B, which is at an unknown distance. Assuming both galaxies have the same intrinsic luminosity, estimate the distance to Galaxy B.
The Milky Way is classified as which type of galaxy?
(1) Elliptical
(2) Spiral
(3) Irregular
(4) Lenticular
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 cloud of gas in space
(4) A planet orbiting a star
Which of the following best describes dark matter?
(1) Matter that emits light
(2) Matter that does not emit or absorb light but has mass
(3) Matter found only in black holes
(4) Matter that is made of antimatter
Which of the following best explains why galaxies do not collapse under their own gravity?
(1) The presence of dark energy
(2) The rotation of galaxies and the distribution of mass
(3) The repulsion between stars
(4) The expansion of the universe
Fill in the blank: The center of most galaxies contains a __________ black hole.
Fill in the blank: The closest galaxy to the Milky Way is the __________ Galaxy.
Fill in the blank: The force that holds galaxies together is __________.
Fill in the blank: The observable universe is estimated to be about __________ billion years old.
A student reads that the Andromeda Galaxy will collide with the Milky Way in about 4 billion years. Is this statement true or false?
True or False: All galaxies contain billions of stars.
True or False: Most of the mass in galaxies is made up of visible matter.
True or False: The Sun is located at the center of the Milky Way galaxy.
