General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
61
Loamy soil is ideal for:
Answer:
Crop cultivation
Loam contains balanced proportions of sand, silt, and clay. It retains moisture and nutrients while allowing drainage. Farmers prefer it for most crops.
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62
The most abundant element in Earth’s crust is:
Answer:
bundant element in Earth’s crust is:
Oxygen makes up nearly half of Earth’s crust. It combines with silicon to form silicates. Silicate minerals dominate crustal composition.
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63
Rocks formed by cooled magma are:
Answer:
y cooled magma are:
Igneous rocks form when molten magma cools. Examples include basalt and granite. They are primary rocks in Earth’s crust.
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64
The breakdown of rocks by weather is known as:
Answer:
Weathering
Weathering breaks rocks into smaller particles. It is caused by wind, rain, temperature, and biological activity. It is vital for soil formation.
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65
Which of the following is NOT a type of rock?
Answer:
Metallic
Rocks are classified into igneous, sedimentary, and metamorphic. Metallic is not a rock type but refers to elements. Rock classification is based on origin.
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66
The deepest part of Earth is called:
Answer:
eepest part of Earth is called:
The inner core is solid due to immense pressure. It is made mainly of iron and nickel. Despite high temperature, it remains rigid.
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### Rocks, Minerals, and Soil
67
The asthenosphere is located:
Answer:
sthenosphere is located:
The asthenosphere is a semi-fluid zone that allows tectonic plates to move. It plays a central role in plate tectonics. This soft layer lies below the lithosphere.
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68
How many primary layers form the Earth’s internal structure?
Answer:
3
The main layers are crust, mantle, and core. Subdivisions exist, such as the lithosphere and asthenosphere, but overall classification remains three. This structure is studied in geology and seismology.
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69
The Earth’s core is mostly made of:
Answer:
Iron and nickel
The dense metallic composition of the core generates Earth’s magnetic field. The outer core is liquid, while the inner core is solid due to pressure. These metals dominate Earth’s interior.
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70
The outermost solid layer of the Earth is called:
Answer:
Crust
The crust is the thin, outermost layer where humans live. It includes both continental and oceanic types. It makes up less than 1% of Earth’s volume but is crucial for ecosystems.
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