Waec Model Questions Vol1 2020 Geography Question 34
Practice objective / multiple choice question 34 from the 2020 Waec Model Questions Vol1 Geography examination.
A rock sample contains 45 % quartz, 30 % feldspar, 15 % mica and 10 % amphibole. According to the following classification rules, determine the rock type: - Igneous: (quartz + feldspar) > 70 % - Metamorphic: (mica + amphibole) > 30 % If the rock is classified as metamorphic, compute its metamorphic‑grade index = (mica % + 2 × amphibole %)/100. What is the rock type, and if applicable, the grade index (to two decimal places)?
Answer Options
About This Question
This is Waec Model Questions Vol1 2020 Geography Question 34. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.