Unit 4 Natural Disasters Assessing Your Progress课件(共21张PPT，内镶嵌视频)-人教版(2019)必修第一册

(共21张PPT)
人教版2019必修一
Unit 4 Natural Disasters
---Assessing Your Progress
（Project: Give a presentation
on natural disasters）
Learning aims
① To consolidate words and grammar of this unit .
② To learn how to give a presentation on natural disasters.
Lead-in
What kind of natural disasters can you think of
a
s
u
n
m
i
Down:
2. a sudden violent movement of the ground
3. a strong wind that blows in a circle
5. hot liquid rock
7. (of a volcano) to explode out fire, lava, smoke, etc.
Cross:
1. A very strong wind in west Atlantic
3. tidal waves
4. a large amount of water covering an area that is usually dry
6. a very bad event, causing harm and death
8. move somebody from a dangerous place
9. a long period without rain
Crossword
Fill in the blanks with correct letters to constitute complete words.
u
r
r
i
c
a
n
a
r
t
h
q
u
a
k
e
a
a
d
o
o
l
f
a
o
r
n
o
e
i
s
s
t
r
e
a
v
c
a
t
d
o
r
u
g
h
t
r
p
e
1
2
3
6
h
t
d
v
4
5
7
8
9
u
1. Circle the correct word in each sentence.
1. The tornado that hit Mississippi last week caused a lot of damage/destroy.
2. The mother thanked the rescue/save worker who found her baby.
3. According to experts, the volcano could crash/erupt this week.
4. Thousands of people are suffering/trapping from illnesses after the disaster.
5. An emergency delivery/supply of food was transported to the area by the army.
6. The earthquake affected/effected an area of several hundred square kilometres.
7. During a natural disaster, the most important thing is to keep calm/quiet.
8. “She’s still breathing/surviving! Come and help me dig her out!” shouted the soldier.
2. Read the passage and fill in the blanks with relative pronouns.
who/that
which/ that
which/ that
who/that
which/ that
which/ that
who
who/ that
which/ that
REFLECTING
What did you learn about natural disasters in this unit that you did not know before
What else do you want to know about natural disasters
What did you find the most difficult in this unit
What in this unit motivated you most
Overall, I thought this unit was interesting useful so-so difficult.
*Project
Give a presentation on natural disasters
1. BRAINSTORM:Work in groups of three or four. Choose one of
the natural disasters below and brainstorm answers to the questions.
earthquake
tornado
wildfire
drought
landslide
avalanche
tsunami
flood
famine
typhoon
volcanic eruption
Understanding the disaster
Are there any known causes of the disaster What can be done to prevent it
Preparing for the disaster
What are the possible effects of the disaster What can be done to prepare for it
In the event of a disaster
What can you do to stay safe during the disaster What kind of help do survivors
2. RESEARCH: Which questions do you not know the answers to Which ones do you need more information on Use the Internet or your school library to find out more.
3. ORGANISE: Put together a presentation using the information you have gathered. Use the tips below to help you.
·Start your presentation with a "hook" (a story or fact to catch the
attention of your listeners).
On Monday, 5 September 20XX, 600 people disappeared when ...
·Reduce your ideas to three main points to help listeners remember
what you say.
So always remember to drop, cover, and hold on. ...
·Prepare visual aids for your presentation (photos, charts, tables, etc.).
4. PRESENT: Give a group presentation to your class.
Thousands of people in Northern California were told to leave their homes in November 2018 because of spreading wildfires. Officials said the fire started as a result of lightning strikes (雷击). This is just one of the many wildfires that happened in 2018. Then how much do you know about wildfires
Wildfires are usually caused by human and natural factors (like lightning, etc.). When wildfires begin, they may threaten people and /or their personal property. So we should try to prevent them. Forest managers should be hired to protect the forest and people should be educated about prevention of forest fires.
Then what should we do when a wildfire begin We should first inform people nearby about it and evaluate them to safe places. We should try to stay calm and move to safe places as soon as possible. After the wildfire, we should provide survivors shelters to rest and medicine help for the injured.
*Video Time
Look through the picture and introduction
PREDICTION
Read the sentences about the formation and effects of tsunamis. Then match each sentence with the correct picture.
A Tectonic plates push together.
B A series of waves expands in all directions.
C Whole sections of cities are destroyed.
BEFORE YOU WATCH
C
B
A
Watch this video
1 Decide whether the statements are true (T) or false (F).
1. There are few warning signs just before a tsunami hits.
2. A tsunami breaks just like an ordinary wave but is bigger.
3. Scientists at the Pacific Tsunami Warning Center monitor the earth’s movements 24 hours a day in order to track tsunami.
WHILE YOU WATCH
F
T
F
T
F
T
2 Circle the correct word(s) in each sentence.
1. An earthquake occurs when plates below the earth’s surface push together/pull apart.
2. Tsunami waves deep at sea move fast and rise only a few/hundreds of feet.
3. As these killer waves enter shallow waters, their speed is reduced/raised.
4. Most tsunami damage is caused when the waves come in from/move back out to the sea.
Work in pairs. Discuss the questions.
1. What have you learnt about tsunamis
They aren’t noticeable or strong until they hit the coast.
AFTER YOU WATCH
2. What kind of help do you think people who have suffered from a tsunami need
They need food, water, shelter, etc. They may also need medical help and emotional help if they have lost loved ones.
Watch another video together.
dangerous
destructive
deadly
disastrous
sudden
...
1. Make a poster to tell people about tsunamis.
2. Make a presentation on tsunamis.
HOMEWORK
Thanks for your watching