Mafic igneous rocks are enriched in ___.

a) silica
b) quartz
c) magnesium, iron and calcium
d) sodium
e) potassium


Ans: c) magnesium, iron and calcium

Environmental & Atmospheric Sciences

You might also like to view...

Most of India's rapidly growing electricity demand is being met by what source?

A) coal B) nuclear C) wind D) dung E) hydropower

Environmental & Atmospheric Sciences

Critical Thinking Which two terrestrial ecosystems in the accompanying figures produce the least kilocalories of energy per year?

What will be an ideal response?

Environmental & Atmospheric Sciences

How long will it take to add another billion people to the world's population given the current  growth rate?

A. 12 years B. 2 years C. 22 years D. 50 years

Environmental & Atmospheric Sciences

What is a wave period?

a. The horizontal distance between two successive crests or troughs b. The number of waves passing a fixed point per second c. The time for a wave to move the distance of one wavelength d. The end of a wave train

Environmental & Atmospheric Sciences