1.4 Tsunamis

1.4 Tsunamis
Page 14 and 15 of the textbook.

Recap volcanos
Check homework
Instruction
Quiz 1.1 - 1.4

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This lesson contains 28 slides, with interactive quizzes, text slides and 1 video.

time-iconLesson duration is: 60 min

Items in this lesson

1.4 Tsunamis
Page 14 and 15 of the textbook.

Recap volcanos
Check homework
Instruction
Quiz 1.1 - 1.4

Slide 1 - Slide

Slide 2 - Link

Volcano La Palma
Hotspot volcanos

Slide 3 - Slide

Slide 4 - Slide

Volcanoes in the ocean
Volcanos in the ocean:
  •  two parts of ocean floor move apart
  •  crack in the Earth’s crust
  •  filled with hot rock (lava)
  •  lava comes into contact with water
  •  lava solidifies
  •  a new piece of ocean floor is formed
  •  mid-oceanic ridge = sort of stretched out mountain range along the ocean floor

Slide 5 - Slide

Did you manage to do the homework?
Page 12 of the workbook (or 1.3 online): 3, 4 and 6.

Slide 6 - Slide

What do you know about tsunamis?

Slide 7 - Slide

Slide 8 - Video

How do tsunamis form?

Slide 9 - Slide

(1) Earthquake on ocean floor > oceanic plate gives water a push > wave movement in seawater

Slide 10 - Slide

(2) Wave approaches shallow coastal area > wave shoaling occurs > wave increases in height > suction at the front of the wave > water recedes from coastline

Slide 11 - Slide

(3) Super wave reaches coast > extremely powerful, high and devastating wave > wave with the same force goes back to sea > devastating suction effect

Slide 12 - Slide

Slide 13 - Slide

Consequences
Why is a tsunami so destructive?
  • wave moves extremely fast, therefore no time to flee
  • tidal wave so strong that it destroys everything in its path
  • due to damage escape routes blocked

Slide 14 - Slide

Rich and poor
Why are the consequences of a tsunami less severe in rich countries than poor countries?
  • rich countries have a better warning system
  • rich countries can build stronger dykes
  • in rich countries the buildings are more strongly built
  • due to better transport systems people can escape more quickly

Slide 15 - Slide

Complete the sentence
The tidal wave (=vloedgolf)/tsunami only becomes high in a ... coastal zone, because the water is ... and the trailing (=achterblijvend) water catches up along the ...


Slide 16 - Slide

Complete the sentence
The tidal wave (=vloedgolf)/tsunami only becomes high in a shallow (=ondiep) coastal zone, because the water is slowed down and the trailing (=achterblijvend) water catches up along the top.


Slide 17 - Slide

Complete the sentence
A tsunami has fewer consequences for the citizens of a rich
country than for citizens of a poor country, because ...

Slide 18 - Slide

Complete the sentence
A tsunami has fewer consequences for the citizens of a rich
country than for citizens of a poor country, because rich countries can pay for warning systems and
warn people faster in case of an approaching
tsunami.

Slide 19 - Slide

Volcanos
Which three things come out of a volcano?

Slide 20 - Slide

Plate tectonics
?
?
?
?

Slide 21 - Slide

Plate tectonics
Convergent
Convergent
Divergent
Transform

Slide 22 - Slide

How are earthquakes connected to plate tectonics?

Slide 23 - Slide

Epicentre
The earthquake is most powerful right above the place where the ocean floor was jammed. That is called the ...?




Slide 24 - Slide

The Richter Scale goes from
A
1-12
B
1-10
C
2-12
D
5-10

Slide 25 - Quiz

How do you call the movement of the tough rock within the Earth's mantle?
A
Currents
B
Magma currents
C
Plate tectonics
D
Convection currents

Slide 26 - Quiz

Next week
Small test about 1.1, 1.2, 1.3 + 1,4

Homework: study for the test

Slide 27 - Slide

One piece of Earth's crust please

Slide 28 - Slide