This lesson contains 28 slides, with interactive quizzes, text slides and 1 video.
Lesson 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
nos.nl
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?