Q1
What causes volcanoes?
AMagma rising through crust weaknesses
BOnly earthquakes
COnly wind
DNothing specific
ICSEClass 9 (ICSE)GeographyCh 6 · Topic 2
Practice and Revision - Volcanoes and Earthquakes
Let us practise and revise what we learned about volcanoes and earthquakes. Volcanoes and earthquakes are powerful geological events caused
Core concept
Volcanoes form when magma rises through weaknesses in Earth's crust, erupting as lava, ash, and gases, often at plate boundaries.
How it works
Earthquakes occur when built-up stress along faults (cracks in the crust) is suddenly released, causing the ground to shake.
Why it matters
Most volcanoes and earthquakes occur along the 'Ring of Fire', a zone around the Pacific Ocean with many tectonic plate boundaries.
Key detail
Understanding these events helps us prepare for and mitigate their impacts, protecting lives and property in vulnerable regions.
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Quick notes
• Volcanoes form when magma rises through crust weaknesses.
• They erupt lava, ash and gases.
• This often occurs at plate boundaries.
• Earthquakes occur when fault stress releases suddenly.
• This causes the ground to shake.
• The 'Ring of Fire' is around the Pacific Ocean.
• Most volcanoes and earthquakes occur there.
• Understanding these events helps disaster preparedness.