Which of the following is volcanic glass which forms when very viscous magma becomes solid?
a) Obsidian
b) Tephra
c) Scoria
d) Lava
e) Tuff
Ans: a) Obsidian
Environmental & Atmospheric Sciences
You might also like to view...
What are some of the characteristics of animals that you would expect to find on an island? What are some characteristics of animals that you would not expect to find?
Environmental & Atmospheric Sciences
The Polynesian colonies used a system of shells and bamboo to represent island positions for navigation
a. True b. False
Environmental & Atmospheric Sciences
Which of the following acids has long been used as a test for proteins?
A) acetic B) boric C) nitric D) sulfuric
Environmental & Atmospheric Sciences
Which of the following is a correct statement about ocean currents?
A. They are warmest in the mid-latitudes. B. They are typically colder than the water 1 km below. C. They are not involved in La Niña events. D. They initiate Ekman spirals.
Environmental & Atmospheric Sciences