GED Science Practice

Disable ads (and more) with a membership for a one time $4.99 payment

Prepare for the GED Science Test with our comprehensive quizzes. Study with flashcards and multiple-choice questions, each providing hints and explanations. Ensure your success on the GED Science Exam!

Start Multiple Choice Practice Test
Start Flash Cards

Practice this question and more.

Which type of rock is limestone mainly composed of based on the text?

  1. Iron

  2. Silica

  3. Calcium

  4. Magnesium

The correct answer is: Calcium

Limestone is mainly composed of calcium. It primarily consists of calcium carbonate (CaCO3), which is formed from the remains of marine organisms, such as coral and shells. This composition not only gives limestone its characteristic properties but also plays a vital role in various geological processes, such as forming sedimentary rocks. The abundance of calcium in limestone makes it an important rock in the study of geology and environmental science, as it is involved in nutrient cycles and can influence soil and water chemistry.

More Questions Like This