This quiz works best with JavaScript enabled. Home > Agriculture > Soil Science > Fundamentals Research > Fundamentals Of Soil Science – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Fundamentals Of Soil Science Quiz 18 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is a disadvantage of using hydroponics? A) Slower plant growth. B) Costs are higher than soil culture. C) Lower crop yields. D) Weeding and cultivation are required. Show Answer Correct Answer: B) Costs are higher than soil culture. 2. The average weather condition in an area over a long period of time is called A) Weather. B) Climate. C) Temperature. D) Humidity. Show Answer Correct Answer: B) Climate. 3. Soil has black color and its best for growing plants A) Clay. B) Sand. C) Organic. D) None of above. Show Answer Correct Answer: C) Organic. 4. In which soil type would water drain easily? A) Sand. B) Silt. C) Clay. D) None of above. Show Answer Correct Answer: A) Sand. 5. Which particle reduces the water holding capacity of soil? A) Sand. B) Silt. C) Clay. D) None of above. Show Answer Correct Answer: A) Sand. 6. Which of the following plants completes its life cycle in one year? A) Annual. B) Perennial. C) Fellial. D) Biennial. Show Answer Correct Answer: A) Annual. 7. The color of the soil indicates some chemical conditions. A) Dark or black color soil indicates high organic matter. B) Dark or black color soil indicates that the soil is high in oxides of iron. C) Dark or black color soil indicates that the soil is at oxidized state. D) All of the above. Show Answer Correct Answer: A) Dark or black color soil indicates high organic matter. 8. Why would you NOT find soils on Mars or Venus? A) Not all materials that make up soil can be found on other planets, such as water, organic materials. B) You can find soil on Mars or Venus. C) Mars and Venus have to much air. D) Mars and Venus does not have enough air. Show Answer Correct Answer: A) Not all materials that make up soil can be found on other planets, such as water, organic materials. 9. Which of these BEST describes the properties of clay-rich soils? A) Medium sized particles, very good drainage, feels rough and gritty. B) Small particles, good drainage, feels like flour. C) Different sized particles, good drainage, rich in organic matter. D) Very small particles, poor drainage, feels sticky when wet. Show Answer Correct Answer: D) Very small particles, poor drainage, feels sticky when wet. 10. Roots absorb which of the following? A) Sunlight. B) Pests. C) Water and nutrients. D) Water and sunlight. Show Answer Correct Answer: C) Water and nutrients. 11. The name for plants that have "identifiable flowers" and produce enclosed seed is: A) Gymnosperms. B) Angiosperms. C) Bryophyta. D) Thallophyta. Show Answer Correct Answer: B) Angiosperms. 12. You would probably find the most decomposers in the soil layer called A) Litter. B) Bedrock. C) Topsoil. D) Loam. Show Answer Correct Answer: C) Topsoil. 13. What are the three types of soil particles? A) Insects, sand, topsoil. B) Clay, sand, silt. C) Topsoil, subsoil, bedrock. D) Earthworms, sand, silt. Show Answer Correct Answer: B) Clay, sand, silt. 14. What must occur in order for plants to grow? A) The rate of photosynthesis must be greater than the rate of respiration. B) The rate of respiration must be greater than the rate of photosynthesis. C) The rate of photosynthesis must be equal to the rate of respiration. D) Alternating rates of photosynthesis and respiration. Show Answer Correct Answer: A) The rate of photosynthesis must be greater than the rate of respiration. 15. Which soil has the lowest water holding capacity? A) Clayey soil. B) Sand. C) Loamy soil. D) None of the above. Show Answer Correct Answer: B) Sand. 16. What is the soil that holds water very well? A) Sand. B) Loam. C) Clay. D) None of above. Show Answer Correct Answer: B) Loam. 17. Why are sand particles different colors? A) Because sand is made from silt, clay, and loam. B) Because the shells are brightly colored and rocks are dark. C) Because the particles come from different colored rocks. D) Because water changes the color of sand. Show Answer Correct Answer: C) Because the particles come from different colored rocks. 18. Mrs. Edwards is comparing soil for texture. Texture of a soil depends on- A) The sizes of the particles in the soil and how they feel. B) The amount of water the soil can hold. C) The color of the soil. D) The types of plants that will grow in that soil. Show Answer Correct Answer: A) The sizes of the particles in the soil and how they feel. 19. What living thing are in soil. A) Sand. B) Glass. C) Minerals. D) Earthworms. Show Answer Correct Answer: D) Earthworms. 20. What is a method for growing plants in water without soil? A) Hydroponics. B) Hydrosphere. C) Organic foods. D) Crop rotation. Show Answer Correct Answer: A) Hydroponics. 21. Water present in soil comes from ..... A) Rainfall or irrigation. B) Air. C) Drains. D) Watering plants. Show Answer Correct Answer: A) Rainfall or irrigation. 22. Your science teacher gives you a glass jar filled with water, decaying material, topsoil, dirt, and small rocks. She has the image of the soil profile on the board. Which layer in the jar would you find at Horizon A? A) Subsoil. B) Bedrock. C) Humus. D) Topsoil. Show Answer Correct Answer: D) Topsoil. 23. Calculate the dry density of the soil, if the bulk density is 2.0 Mg/m3 and Water content is 20%. A) 0.09 Mg/m3. B) 2.4 Mg/m3. C) 0.6 Mg.m3. D) 1.67 Mg/m3. Show Answer Correct Answer: D) 1.67 Mg/m3. 24. How can a plant become a part of soil? A) The plant's roots can grow deep in the ground. B) The plant's seeds can drop on the ground and get eaten. C) The plant's flower can stick pollen to a bee. D) The plant's leaves can decompose after they fall. Show Answer Correct Answer: D) The plant's leaves can decompose after they fall. 25. Medium-sized mineral particles of soil A) Sand. B) Silt. C) Clay. D) Horizons. Show Answer Correct Answer: B) Silt. 26. Why is water such an important component of soils? A) Soil formation would be possible without water. B) Water is a great help for soil. C) Soils doesn't need water. D) Soil formation would not be possible without water. Show Answer Correct Answer: D) Soil formation would not be possible without water. 27. The process by which minerals in soil are removed or washed away is called ..... A) Hydrolysis. B) Leaching. C) Carbonation. D) Fertilizing. Show Answer Correct Answer: B) Leaching. 28. 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) Washing out. B) Leaching. C) Deforestation. D) Transportation. Show Answer Correct Answer: B) Leaching. 29. Which layer of soil is the middle layer? A) Bedrock. B) Humus. C) Parent Material. D) Subsoil. Show Answer Correct Answer: D) Subsoil. 30. It is considered as the basic structural unit of soil. A) Peds. B) Aggregates. C) Land. D) Gravel. Show Answer Correct Answer: B) Aggregates. ← PreviousNext →Related QuizzesSoil Science QuizzesAgriculture 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books