Tsunami!

What causes a tsunami?

• shaking of the water during an earthquake or volcano

• Seismic energy released by tectonic plates

• a really big boat

Which word do we use to describe how big an earthquake is?

• seismic

• meteorologic

• lithosphere

• magnitude

The scale that we measure magnitude is ...

• The Reinhart Scale

• The Roosevelt Scale

• The Richter Scale

• The Rose Scale

The 2011 earthquake in Japan (that you watched the Edpuzzle video about) measured 9.2 on the Richter scale. This means

• buildings fell down

• windows broke

• catastrophic damage

• it was the biggest earthquake ever

What's the lithosphere?

• The crust and upper mantle, which are affected by earthquakes.

• The crust and the atmosphere, where we see shaking occurring.

• The atmosphere and the biosphere.

• The upper and lower mantle, where volcanic magma is made.

Why do tsunami waves get so big?

• Seismic energy is released in the water

• The further the waves go from the epicentre, the bigger they get

• As the waves get closer to shore, friction lowers the speed but raises the height