Hello everyone! Today we are going to learn Unit 4 Earthquake Zones.

Before reading the text, let’s have a prevision of the vocabulary.

The first one, random.This word can be both an adjective and a noun. As an adjective, random refers to done, chosen, etc. without somebody deciding in advance what is going to happen, or without any regular pattern. There is an example sentence. The information is processed in a random order. As a noun, random is always use as an Idioms, at random. Let’s see an example sentence. A small boy appears utterly confused as the ears twirl apparently at random above him.

The second word, massive.As an adjective, it has two meanings. Firstly, massive means very large, heavy, and solid. Let’s look at an example sentence. He reached the massive door of the barn and pushed. It yielded. Secondly, massive means extremely large or serious. There is an example sentence. The explosion made a massive hole in the ground.

Then, the third word, zone.As a noun, zone refers to an area or a region with a particular feature or use. Let’s take a look at an example sentence. The new treaty establishes a free trade zone. As a verb, zone refers to keep an area of land to be used for a particular purpose. There is an example sentence. This small town has been zoned as a shopping area.

Then, precise. It is an adjective, which has three meanings. Firstly, it means clear and accurate. Let’s take a look at an example sentence. She gave me clear and precise directions. Secondly, it is used to emphasize that something happens at a particular time or in a particular way. There is an example sentence. At the precise moment that I put my foot on the step, the bus started.Thirdly, precise means taking care to be exact and accurate, especially about small details. For example, I could pinpoint his precise location on a map.

The fifth word is laboratory. It is a noun, which means a room or building used for scientific research, experiments, testing, etcetera. Let’s look at an example sentence. Laboratory and field tests have been conducted.

The sixth word detect. Detect is a verb. It means to discover or notice something, especially something that I’d not easy to see, hear, etcetera. There is an example sentence. We are trying to detect and understand how the climates change.

Next one, drill. Drill can be used as both a noun and a verb. As a noun, it has four meanings. Firstly, drill refers to a tool or machine with a pointed end for making holes. Let’s look at an example sentence. The drill is strong enough to bore through solid rock. Secondly, drill refers to a way of learning something by means of repeated exercises. There is an example sentence. A fire drill will be conducted in your residence hall every semester. Thirdly, drill means a practice of what to do in an emergency, for example if there is a fire. There is an example sentence. This is not a fire drill-it’s for real. Fourthly, it means military training in marching, the use of weapons, etcetera. Let’s take a look at an example sentence. Vietnam then held a live military drill on the disputed zone, apparently sending a message to China.

Drill can also be used as a verb, which has there meanings. Firstly, it means to to make a hole in something, using a drill. Let’s take a look at an example sentence. The dentist drilled my tooth. Secondly, it drills means to teach somebody to do something by making them repeat it a lot of times. There is an example sentence. I’m drilling her on English conversation at dinnertime. Thirdly, it means to train soldiers to perform military actions. For example, the recruits drilled regularly.

Then, schedule. Schedule can be used as both a noun and a verb. As a noun, it has three meanings. Firstly, schedule refers to a plan that lists all the work that you have to do and when you must do each thing. There is an example sentence. We have a very crowded schedule. Secondly, schedule means timetable. Let’s look at an example sentence. I needed to accommodate to the new schedule. Thirdly, schedule refers to a list. Let’s take a look at an example sentence. Everything went according to schedule.

As a verb, it has two meanings. Firstly, it refers to arrange for something to happen at a particular time. There is an example sentence.The meeting is scheduled for Friday afternoon. Secondly, schedule means to include something in an official list of things. Let’s take a look at an example sentence. The substance has been scheduled as a poison.

Then, data.It is a noun. It has two meanings. Firstly, it means facts or information, especially when examined and used to find out things or to make decisions. Let’s look at an example sentence. They had hacked secret data. Secondly, data means information that is stored by a computer. There is an example sentence. The data are stored in the computer's memory.

The last word, track. Track can be used as both a noun and a verb. As a noun, track has three meanings. Firstly, it means to a rough path or road, usually one that has not been built but that has been made by people walking there. There is an example sentence. It was a bumpy ride along the farm track. Secondly, track means to marks left by a person, an animal or a moving vehicle. Let’s take a look at an example sentence. We followed the bear's tracks in the snow. Thirdly, track means rails that a train moves along. There is an example sentence. India has thousands of miles of track.

As a verb, track has three meanings. Firstly, it means to find somebody or something by following the marks, signs, information, etc. that they have left behind them. There is an example sentence. The radar beam can track a number of targets almost simultaneously. Secondly, track means to follow the movements of somebody or something, especially by using special electronic equipment. Let’s take a look at an example sentence. We continued tracking the plane on our radar. Thirdly, tracks means to follow the progress or development of somebody or something. There is an example sentence. The research project involves tracking the careers of 400 graduates.

Those are the ten words you have to know in your prevision. Can you remember all of them? To ensure you have mastered each word, please complete the Vocabulary Practice on page 70.

Thanks for your attention!