What is the effect of silica when it's in lava?

Question

BlackTom AI · Accepted Answer

When considering how silica content affects lava, the main concept to grasp is that silica tetrahedra form networks that make molten rock thicker and stickier.
Option 1: 'The greater the amount of silica in the lava, the more viscous it is.' This statement aligns with silica- rich lava forming a stronger silicate network, which increases viscosity and hinders flow.
Option 2: 'The viscosity of lava is not related to how much silica there is in the lava.' This is incorrect because silica content is a primary control on viscosity in most magmas; ignoring it overlooks a fundamental relationship in petrology.
Option 3: 'A lava that has no silica at all will never be able to melt.' This is false; silica-free lava is not a meaningful real-world concept, and melting behavior depends on temperature, pressure, and composition; silica presence is not a binary gate for melting.
Option 4: 'The greater the amount of silica in a lava, the less viscous it is' This contradicts well-established geology: increasing silica generally increases viscosity, not decreases it. The statement reverses the accepted trend and misrepresents the chemistry-structure relationship in silicate melts.

FA25: GEOL-103 Sec 02 - Earth Systems Quiz 1.2: Igneous Rocks (Due 9/23)

What is the effect of silica when it's in lava?

View Explanation

Log in for full answers

Similar Questions

Volcanic eruptions on Hawaii usually are relatively non-explosive because:

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler