english material

1. Precise Explanations
Bahasa Inggris kelas XI
Bab 3
Teacher Support Resource by:

2. Tujuan Pembelajaran
• Identify the social function, text structure, and language features of explanation texts related to natural
and social phenomena correctly and accurately.
• Differentiate the social function, text structure, and language features of explanation texts related to
natural and social phenomena correctly and accurately.
• Create spoken and written explanation texts related to natural and social phenomena correctly and
accurately.
• Use relevant vocabulary appropriately.
• Feeling grateful for having an opportunity to learn and speak English appropriately and fluently.
• Behaving bravely, confidently, and politely when speaking with people.

3. Precise Explanations
• Explanation Text
• Assessment
• Student Activity
• Computational Thinking

4. Explanation Text
Read the following text, aloud.
Hurricanes are the most violent storms on Earth. People call
these storms by other names, such as typhoons or cyclones,
depending on where they occur. The scientific term for all these
storms is tropical cyclone. Only tropical cyclones that form over
the Atlantic Ocean or eastern Pacific Ocean are called
“hurricanes.”
Tropical cyclones are like giant engines that use warm, moist
air as fuel. That is why they form only over warm ocean waters
near the equator. The warm, moist air over the ocean rises
upward from near the surface. Because this air moves up and
away from the surface, there is less air left near the surface.
Another way to say the same thing is that the warm air rises,
causing an area of lower air pressure below.
How do Hurricanes Form?

5. The air from surrounding areas with higher air pressure pushes in to the low pressure area.
Then, that “new” air becomes warm and moist, and rises, too. As the warm air continues to rise,
the surrounding air swirls in to take its place. As the warmed, moist air rises and cools off, the
water in the air forms clouds. The whole system of clouds and wind spins and grows, fed by the
ocean’s heat and water evaporating from the surface.
Storms that form north of the equator spin counterclockwise. Storms south of the equator spin
clockwise. This difference is because of Earth’s rotation on its axis.
As the storm system rotates faster and faster, an eye forms in the center. It is very calm and
clear in the eye, with very low air pressure. Higher pressure air from above flows down into the
eye. When the winds in the rotating storm reach 39 mph, the storm is called a “tropical storm.”
And when the wind speeds reach 74 mph, the storm is officially a “tropical cyclone” or hurricane.
Tropical cyclones usually weaken when they hit land, because they are no longer being “fed”
by the energy from the warm ocean waters. However, they often move far inland, dumping many
inches of rain and causing lots of wind damage before they die out completely.

6. Answer the following questions.
1. What is the text about?
2. What is the purpose of the text?
3. What does paragraph one tell us about?
4. Which paragraphs explain the formation of the natural
phenomenon?
5. What tense is used in the text?
6. Why does the text use the tense?
7. What kinds of verbs are used in the text: action,
verbal, or mental?
8. Why does the text use such verbs?
9. What conjunctions or sentence connectors are used
in the text?
10. What are technical terms in the text and what do they
mean?

7. Identify the structure of the text in Slide 2 and 3.
Purpose : To describe how or why a certain phenomenon happens or occurs.
Content : Provides a sequence of events (explaining how) and reasons for
a process or phenomenon (explaining why).
Types : 1. Sequential explanation
2. Cause-effect explanation
STRUCTURE
• Title/Introduction : identifies the topic to be explained.
• General Statement : identifies the process to be explained.
• Sequence of Explanation : describes how and why.
• Conclusion : puts all the information together (optional).
Do the activities in your PR Bahasa Inggris on pages
40–54.

8. Teacher Support Resource
by:
Terima Kasih