Home
Listening
Listen to an Announcement Test #069
Listen to an Announcement
1. What is the main topic of the lecture?
A) The Ring of Fire
B) The theory of plate tectonics
C) The composition of Earth's mantle
D) The causes of volcanic eruptions
2. What can be inferred about earthquakes?
A) They are rare and unpredictable
B) They only happen near oceans
C) They are related to plate movement
D) They are becoming more frequent
Professor: Today's topic is fundamental: plate tectonics. This is the theory that Earth's outer shell is divided into several plates that glide over the mantle. Most geological activity, such as earthquakes and volcanic eruptions, occurs at the boundaries where these plates interact. For instance, the 'Ring of Fire' around the Pacific Ocean is a direct result of these plate movements. Understanding this concept is crucial for grasping nearly all major geological processes we'll discuss this semester.
Highlights
| ID: | #io3298569278 |
Tags
New TOEFL