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 9
Describe the main difference between a spiral galaxy and an elliptical galaxy.
Describe what is meant by a galaxy cluster.
Explain what is meant by the term 'observable universe'.
Explain why astronomers use light-years instead of kilometers to measure distances in space.
Explain why galaxies do not collapse under their own gravity.
What force holds galaxies together?
What is a black hole?
What is a light-year?
The Milky Way is an example of which type of galaxy? (1) Elliptical (2) Spiral (3) Irregular (4) Lenticular
What is the approximate age of the universe according to current scientific understanding? (1) 1 billion years (2) 4.5 billion years (3) 13.8 billion years (4) 100 billion years
Which of the following best describes a galaxy? (1) A large group of stars, gas, and dust held together by gravity (2) A single star and its planets (3) A cloud of gas in space (4) A planet orbiting a star
Which of the following best describes an irregular galaxy? (1) Has a well-defined shape (2) Lacks a regular shape (3) Is always the largest type (4) Contains no stars
Fill in the blank: A __________ is a huge explosion that marks the end of a massive star's life.
Fill in the blank: A __________ is a system of millions or billions of stars, together with gas and dust, held together by gravity.
Fill in the blank: The __________ is the name given to the explosion that started the universe.
Fill in the blank: The __________ is the name of our galaxy.
True or False: A nebula is a region of space filled with gas and dust where new stars can form.
True or False: All galaxies have the same shape.
True or False: Dark matter can be seen with telescopes.
True or False: Most galaxies are part of larger groups called clusters.
