Which of the Following Locations Five Kilometers from the Crater

question 18

Multiple Choice

Which of the following locations five kilometers from the crater of a volcano would likely be safe from a large pyroclastic flow,if any?

• A) far side of a steep-sided, 100-meter-high hill
• B) far side of a five-kilometer-wide lake
• C) behind a large tree with an 80-centimeter-diameter (2½ feet) trunk
• D) None of the locations are safe: ash flows can flow over large hills, can cross large expanses of water, and can fell very large trees.
• E) All of the locations are safe: ash flows cannot flow over large hills, cannot cross large expanses of water, and cannot topple very large trees.

---

Definitions:

Products

Substances that are formed as a result of a chemical reaction, found on the right side of a chemical equation.

Constant Temperature

A condition or process that occurs at an unchanging temperature, regardless of other varying factors.

Chemical Reaction

A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Constant Pressure

A condition or process in which the pressure remains unchanged over time.