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