Ontario Grade 9 Science Class Practice Exam

What are comets made of?

Gas and dust only Lava and rock Ice, rock, and dust Liquid water and minerals

Correct Answer:

Ice, rock, and dust

Explanation:

Comets are astronomical objects made of ice, rock, and dust. Option A is incorrect because comets are not exclusively made of gas and dust. While they may have a gas-like appearance due to the sublimation of ice, they also contain solid materials. Option B is incorrect because comets do not have a molten or liquid interior, and are not composed of lava. Option D is incorrect as comets are not known to have liquid water as a component, and minerals only make up a small fraction of their overall composition. Therefore, the best answer is C which includes all three components commonly found in comets.

Access more questions from this quiz

Continue to Ontario Grade 9 Science Class Practice Exam for more practice questions and the full quiz experience.

Access More Questions