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The Natural Realms of the Earth -Lithosphere

Kerala Board · Class 9 · Social Science

Flashcards for The Natural Realms of the Earth -Lithosphere — Kerala Board Class 9 Social Science. Quick Q&A cards covering key concepts, definitions, and formulas.

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Card 1Natural Realms

What are the four natural realms of the Earth?

Answer

The four natural realms are: 1. Lithosphere (solid crust made of rocks and minerals), 2. Hydrosphere (realm of water including rivers, oceans, groundwater), 3. Atmosphere (thin layer of air containing

Card 2Lithosphere Definition

Define Lithosphere and explain its Greek origin

Answer

Lithosphere is the solid crust or hard top part of the Earth made up of rocks and minerals and covered with soil. The term comes from Greek words 'Litho' (meaning stone or rock) and 'sphaira' (meaning

Card 3Landforms Classification

What are the three orders of landforms? Give examples.

Answer

First Order Landforms: Primary division into continents and oceans. Second Order Landforms: Mountains, plateaus, and plains formed by internal Earth processes. Third Order Landforms: Features carved b

Card 4Plate Tectonics

Name the seven major tectonic plates of the Earth

Answer

The seven major tectonic plates are: 1. African Plate, 2. North American Plate, 3. South American Plate, 4. Indo-Australian Plate, 5. Antarctic Plate, 6. Eurasian Plate, 7. Pacific Plate. There are al

Card 5Sea-floor Spreading

Explain the process of sea-floor spreading with its stages

Answer

Sea-floor spreading occurs at mid-ocean ridges where new oceanic crust is formed. Stages: 1. Continental cracks due to convection currents, 2. Cracked portion collapses to form rift valley, 3. Oceans

Card 6Mountain Formation

How were the Himalaya mountains formed according to plate tectonics?

Answer

The Himalayas were formed when the Indian plate pushed into and went under the Eurasian plate. This process is like pushing a cloth sheet on a table - it folds to form mountain-like formations. The co

Card 7Volcanoes and Earthquakes

What is the Pacific Ring of Fire and why is it significant?

Answer

The Pacific Ring of Fire is the edge of the Pacific Ocean basin where about 3/4 of all active volcanoes in the world are located. It's significant because plate boundaries are found all around the Pac

Card 8Weathering

Define weathering and explain its types

Answer

Weathering is the gradual disintegration of rocks by atmospheric or weather forces. It occurs through: 1. Temperature changes - rocks expand when heated and contract when cooled, making them brittle,

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What are the important topics in The Natural Realms of the Earth -Lithosphere for Kerala Board Class 9 Social Science?
The Natural Realms of the Earth -Lithosphere covers several key topics that are frequently asked in Kerala Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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