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