Galaxies and the Universe

Physics ⇒ Earth and Space Physics

Galaxies and the Universe starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Galaxies and the Universe. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

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?

What is cosmic background radiation?

What is the main evidence that the universe is expanding?

What is the name of the theory that explains the origin of the universe?

What is the role of dark matter in galaxies?