Tsunamis Fact File Template (teacher made) - Twinkl - Free Printable

Let’s go step by step to answer each question on the worksheet about tsunamis. We’ll use simple facts that are easy to understand and remember.

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What is a tsunami?

A tsunami is a series of huge ocean waves caused by sudden movements under the sea — like earthquakes, landslides, or volcanic eruptions. These waves can travel very fast across the ocean and become extremely tall when they reach shallow water near land. They’re not regular wind-made waves — they’re much bigger and more dangerous.

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What causes a tsunami?

Most tsunamis are caused by underwater earthquakes. When tectonic plates (huge pieces of Earth’s crust) suddenly shift under the ocean, they push up or drop down the seafloor. This moves a lot of water above it, creating powerful waves that spread out in all directions. Other causes include underwater landslides, volcanic explosions, or even meteorites hitting the ocean — but earthquakes are the most common cause.

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What damage can tsunamis cause?

Tsunamis can destroy homes, roads, bridges, and buildings. The force of the water can sweep away cars, boats, and people. Saltwater from the tsunami can ruin farmland and contaminate drinking water. Power lines and communication systems often get knocked out. In worst cases, thousands of lives can be lost. After the wave recedes, there’s often mud, debris, and pollution left behind.

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How can tsunamis be prevented?

We can’t stop tsunamis from happening — nature controls them. But we *can* reduce their damage by:

- Building early warning systems (like sensors in the ocean) to alert people before the wave hits.
- Making strong seawalls or breakwaters along coasts.
- Planning evacuation routes so people can run to higher ground quickly.
- Teaching communities what to do if a tsunami warning is issued.
- Not building houses or schools too close to the shore in high-risk areas.

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Which places are most at risk from tsunamis and why?

Places near active earthquake zones around the Pacific Ocean are most at risk — this area is called the “Ring of Fire.” Countries like Japan, Indonesia, Chile, Alaska, and the west coast of the USA (especially California and Oregon) are often hit because they sit right next to where tectonic plates collide. Also, islands in the Pacific (like Hawaii) can be affected even if the quake happens far away — because tsunami waves can travel thousands of miles across the ocean.

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What major tsunamis have occurred throughout history?

Here are some big ones:

1. 2004 Indian Ocean Tsunami – Caused by a massive earthquake off Sumatra, Indonesia. Killed over 230,000 people across 14 countries. One of the deadliest natural disasters ever.

2. 2011 Tohoku Tsunami (Japan) – Triggered by a 9.0 magnitude earthquake. Waves reached up to 40 meters high. Caused the Fukushima nuclear disaster. Over 15,000 died.

3. 1960 Chilean Tsunami – From the largest earthquake ever recorded (magnitude 9.5). Waves traveled across the Pacific and killed people as far away as Hawaii and Japan.

4. 1883 Krakatoa Eruption (Indonesia) – A volcano exploded and created huge tsunamis that killed about 36,000 people.

These events show how powerful and widespread tsunamis can be.

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Final Answer:
All answers filled in clearly and simply for each box on the worksheet using accurate, student-friendly explanations.