This quiz works best with JavaScript enabled. Home > Soil Science > Fundamentals Research > Fundamentals Of Soil Science – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Fundamentals Of Soil Science Quiz 28 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The process by which minerals in soil are removed or washed away is called ..... A) Carbonation. B) Leaching. C) Fertilizing. D) Hydrolysis. Show Answer Correct Answer: B) Leaching. 2. When rain falls, water passes through the soil, washing minerals, humus and nutrients from the A horizon into the B horizon. This process is called? A) Leaching. B) Washing out. C) Deforestation. D) Transportation. Show Answer Correct Answer: A) Leaching. 3. Which layer of soil is the middle layer? A) Bedrock. B) Humus. C) Subsoil. D) Parent Material. Show Answer Correct Answer: C) Subsoil. 4. It is considered as the basic structural unit of soil. A) Peds. B) Aggregates. C) Land. D) Gravel. Show Answer Correct Answer: B) Aggregates. 5. Physical weathering is the alteration of the physical properties of the materials without changing its chemical composition. All of this are the processes of physical weathering EXCEPT. A) Unloading of erosion. B) Diurnal fluctuation in temperature. C) Alternate freezing and thawing. D) Solidification of materials due to heavy rain. Show Answer Correct Answer: D) Solidification of materials due to heavy rain. 6. Which answer choice describes the characteristics of sand? A) The middle size of the three compacts really well. Feels like flour and is smooth when wet. B) Is the biggest of the three particles does not compact well. Feels Gritty. C) The smallest and finest of the three particles. Packs extremely well. Feels slimy and sticky. D) None of above. Show Answer Correct Answer: B) Is the biggest of the three particles does not compact well. Feels Gritty. 7. What layer is also called the humus layer and is made up of plant remains like leaves and twigs? A) Organic. B) Bedrock. C) Parent material. D) Bedrock. Show Answer Correct Answer: A) Organic. 8. How does each soil types differ? A) Texture. B) Color. C) Both texture and color. D) None of above. Show Answer Correct Answer: C) Both texture and color. 9. Which soil is good for farming? A) Clay. B) Silty. C) Peat. D) Sandy. Show Answer Correct Answer: C) Peat. 10. Which type of soil does water have difficulty moving through easily? A) Sandy. B) Humus. C) Loam. D) Clay. Show Answer Correct Answer: D) Clay. 11. Soil horizons, in order, from the surface are: A) A, O, B, C, R. B) O, A, B, C, R. C) A, B, C, R, O. D) R, A, B, C, O. Show Answer Correct Answer: B) O, A, B, C, R. 12. Calculate the percent of volumetric moisture content if the gravimetric is 25%, bulk density of 1.20g/cm3 and water density of 1.00g/cm3. A) 15%. B) 20%. C) 25%. D) 30%. Show Answer Correct Answer: D) 30%. 13. The shape of a ped is called its A) Structure. B) Structure type. C) Structure grade. D) Structure class. Show Answer Correct Answer: B) Structure type. 14. What type of soil is good for the plants? A) Clay. B) Loam. C) Sand. D) None of above. Show Answer Correct Answer: B) Loam. 15. How many primary roots are in a taproot system? A) One. B) Two. C) Three. D) Bajillion. Show Answer Correct Answer: A) One. 16. How is the air found in soils different from the air in the atmosphere? A) Has no humid all Carbon Dioxide. B) Much more humid and moist and is rich in carbon dioxide but has less oxygen. C) Much more humid and moist and is rich in Oxygen but has less Carbon Dioxide. D) Has no humid all Oxygen. Show Answer Correct Answer: B) Much more humid and moist and is rich in carbon dioxide but has less oxygen. 17. What type of soil has the smallest particles? A) Clay. B) Peaty. C) Silt. D) Sandy. Show Answer Correct Answer: A) Clay. 18. Based on the problem above, calculate the pore space of a soil if the bulk density is 1.09g/cm3 and a particle density was 2.65g/cm3. A) 58.90%. B) 60.00%. C) 58.00%. D) 59.00%. Show Answer Correct Answer: A) 58.90%. 19. Which type of soil is used to make toys and pots A) Clayey soil. B) Loamy soil. C) Silty soil. D) Sandy soil. Show Answer Correct Answer: A) Clayey soil. 20. This term describes decayed organic matter such as dead plants and animals A) Topsoil. B) Subsoil. C) Humus. D) Soil. Show Answer Correct Answer: C) Humus. ← 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