This quiz works best with JavaScript enabled. Home > Soil Science > Fundamentals Research > Fundamentals Of Soil Science – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Fundamentals Of Soil Science Quiz 15 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How does soil form? A) Soil forms as rock is broken down by weathering and mixed with other materials on the surface. B) Soil forms when someone takes a shovel and breaks rocks, and then mixes it with dirt. C) Soil forms when an you throw rocks and dirt into a pond. D) Soil forms when you mix water and rocks together, then add air. Show Answer Correct Answer: A) Soil forms as rock is broken down by weathering and mixed with other materials on the surface. 2. In which layer of soil do plant roots grow? A) Humus. B) Topsoil. C) Subsoil. D) Bedrock. Show Answer Correct Answer: B) Topsoil. 3. If you dug up some soil and put it in a warm place what would happen to the dirt? A) It would become rocks. B) The water would evaporate from the soil. C) It would become clay. D) It would become humus. Show Answer Correct Answer: B) The water would evaporate from the soil. 4. Which of these is the correct definition for the term sustainable? A) The responsible development and management of areas. B) Improvement of a run down area. C) Meeting the needs of people without damaging the ecological, economic, or social components of the environment. D) People take responsibility for improving their living conditions. Show Answer Correct Answer: C) Meeting the needs of people without damaging the ecological, economic, or social components of the environment. 5. Breaking down of rocks is called ..... A) Weathering. B) Soil erosion. C) Photosynthesis. D) None of above. Show Answer Correct Answer: A) Weathering. 6. What term refers to the living organisms in soil? A) Biota. B) PH. C) Parent material. D) Topography. Show Answer Correct Answer: A) Biota. 7. Water can drain easily through - A) Sandy soil. B) Loamy soil. C) Clayey soil. D) None of above. Show Answer Correct Answer: A) Sandy soil. 8. Which soil has the smallest particles? A) Clay. B) Loam. C) Sand. D) Silt. Show Answer Correct Answer: A) Clay. 9. Which of the following items is a primary ingredient of humus? A) Dead plant material. B) Rocks from Earth's crust. C) Minerals. D) Metals. Show Answer Correct Answer: A) Dead plant material. 10. What are plants? A) Living things like radishes, trees, roses, and grass. B) Rocks in soil. C) Animals. D) None of above. Show Answer Correct Answer: A) Living things like radishes, trees, roses, and grass. 11. How does soil play an important role to life on Earth? A) The soil helps clean our water. B) Plants get nutrients from soil to grow. C) Soil releases gas such as carbon dioxide into the air. D) All of the above. Show Answer Correct Answer: D) All of the above. 12. Which particle is the most porous and allows for the most water to travel between them? A) Silt. B) Sand. C) Clay. D) Loam. Show Answer Correct Answer: B) Sand. 13. The two main factors that determine the rate of weathering are the TYPE of rock and ..... A) Music. B) Climate. C) Size of rock. D) Weight of rock. Show Answer Correct Answer: B) Climate. 14. What is the total value of crops exported from South Dakota annually? A) $ 1.4 billion. B) $ 431.2 billion. C) $ 5 billion. D) $ 225 billion. Show Answer Correct Answer: A) $ 1.4 billion. 15. Why is soil important to living things? A) Forms part of the earth where animals live. B) Provides the necessary nutrients needed by plants. C) Serves as a place where people live. D) All of the above. Show Answer Correct Answer: D) All of the above. 16. Soil is composed of three particle sizes. Which answer shows the arrangement from largest to smallest? A) Sand, Silt, Clay. B) Clay, Silt, Sand. C) Sandy, Clay, Silt. D) Silt, Sand, Clay. Show Answer Correct Answer: A) Sand, Silt, Clay. 17. Based on the virtual museum experiment, which type of soil retained the most water? A) Sand. B) Gravel. C) Clay. D) None of above. Show Answer Correct Answer: C) Clay. 18. Which of the following is a term for heterosis? A) Homozygous. B) Hybrid vigor. C) Heterosis. D) Heredity. Show Answer Correct Answer: B) Hybrid vigor. 19. Place the following layers in order from top to bottom:bedrock, topsoil, subsoil, organic, parent material. A) Organic, Topsoil, Subsoil, Parent Material, Bedrock. B) Organic, Topsoil, Parent Material, Subsoil, Bedrock. C) Topsoil, Organic, Subsoil, Parent Material, Bedrock. D) Topsoil, Organic, Parent Material, Subsoil, Bedrock. Show Answer Correct Answer: A) Organic, Topsoil, Subsoil, Parent Material, Bedrock. 20. Which particle holds the least amount of water? A) Clay. B) Silt. C) Sand. D) None of above. Show Answer Correct Answer: C) Sand. ← PreviousNext →Related QuizzesSoil Science QuizzesFundamentals Of Soil Science Quiz 1Fundamentals Of Soil Science Quiz 2Fundamentals Of Soil Science Quiz 3Fundamentals Of Soil Science Quiz 4Fundamentals Of Soil Science Quiz 5Fundamentals Of Soil Science Quiz 6Fundamentals Of Soil Science Quiz 7Fundamentals Of Soil Science Quiz 8Fundamentals Of Soil Science Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books