Basalt is an igneous rock formed in this way. Cross-section of a volcano. Would you expect rocks with large crystals to form, at A, B, or C?

No, I do not expect rocks with large crystals to form at A, B, or C. If the magma is erupted at the surface of the Earth, for example, at a volcano called lava. Lava at the Earth's surface cools and solidifies quickly. This means the crystals does not have time to grow and the crystals are small.

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Cambridge Lower Secondary Science Stage 7 : Student's Book>Chemistry>Chapter 6 - The Earth>Exercise 5

Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 5: Exercise 5

Author:Mark Levesley, Chris Meunier, Fran Eardley & Gemma Young

Mark Levesley Science Solutions for Exercise - Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 5: Exercise 5

Attempt the free practice questions from Exercise 5: Exercise 5 with hints and solutions to strengthen your understanding. Cambridge Lower Secondary Science Stage 7 : Student's Book solutions are prepared by Experienced Embibe Experts.