Understanding Tsunamis: Nature's Powerful Force
Exploring the devastating impact of tsunamis, this chapter delves into the causes, effects, and responses to these seismic sea waves. Through real-life narratives and new vocabulary, readers gain insights into the science and aftermath of natural disasters like tsunamis.
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Chapter 2 THE TSUNAMI
INTRODUCTION: A tsunami also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices), landslides, glacier calving, meteorite impacts and other disturbances above or below water all have the potential to generate a tsunami Unlike normal ocean waves which are generated by wind or tides which are generated by the gravitational pull of the Moon and Sun, a tsunami is generated by the displacement of water.
Objectives To develop the understanding of natural disasters like tsunami To enable the students identify the reason a tsunami occurs and its affects To enable the students to react in natural disasters like tsunami. To enable the students answer the questions appropriately.
Textual Points Sanjeev was a life-guard serving in the Katchall island of the Nicobar group of islands. Meghna was brought to the shore by a wave. Almas Javed had gone with her family to celebrate Eid in Nancowry Island. The tsunami waves were triggered by a massive earthquake off Northern Sumatra.
Textual Points contd. The hotel building in which Tilly was staying withstood the surge of four tsunami waves. Tilly's geography lesson saved many lives. Many animal carcasses were found on the Patanangala beach inside the Yala National Park in Srilanka. Animals can sense an approaching disaster long before humans realise what's going on.
NEW WORDS Archipelago-a group of many islands and the surrounding sea Tremor- the earth s shakes during an earthquake Chaos- complete disorder or confusion Recede- move back from where it was Traumatised- greatly shocked and distressed
New words contd. Resort- a place where people go to enjoy holiday Refuge-shelter or protection from daanger Withstood- endured without collapsing Surge- force; momentum Swelling- increasing (in our context) Forewarned- prior information of a possible future danger or problem
