MCQs Soil Science-51 Posted on May 10, 2025August 30, 2025Author agropublishers 0 1. __________ is an essential component of both mica and clay minerals Silicon Calcium Iron Sodium 2. What defines a soil series? Soils with highly variable profiles Soils classified by climate Soils grouped by vegetation type Soils with similar profile characteristics 3. ____________ can vary within a soil phase Only organic matter Soil color but not texture Only mineral content Slope, erosion, and gravel content 4. _______ is a soil particle that feels gritty and allows rapid water drainage Organic Matter Sand Silt Clay 5. What evidence suggests that many layers of rock on Earth have been deformed? They form in horizontal layers but are now folded or tilted We can observe rock deformation in real-time during earthquakes Rocks on other planets show similar deformation Earth’s size reduction over time caused rock deformation 6. Glucose and fructose are examples of ___________ Proteins Fats Carbohydrates Nucleic acids 7. __________ is a direct source of river water Residential sewer discharge Groundwater springs Ocean tides Volcanic eruptions 8. Scientific evidence, based on the study of meteorites and moon rocks, indicates that Earth was formed approximately ___________ 460,000 years ago 46,000 years ago 4.6 million years ago 4.6 billion years ago 9. The presence of alluvial deposits is primarily characteristic of ________ Desert River valleys Ocean basins Glacial moraines 10. Which of the following cellular components allows the selective movement of substances to enter and exit the cell? Vacuole Endoplasmic reticulum Cell wall Cell membrane Loading … Question 1 of 10
