Earthquakes
The sudden shaking of the ground caused by seismic waves.
What is an earthquake?
An opening in Earth’s crust where lava erupts.
What is a volcano?
A giant ocean wave caused by displaced water.
What is a tsunami?
A sudden downhill movement of rock and soil.
What is a landslide?
Scientists use this tool to detect small earthquakes before eruptions.
What is a seismometer?
These boundaries are where most earthquakes occur.
What are plate boundaries?
Molten rock below Earth’s surface.
What is magma?
Most tsunamis are caused by this natural event under the ocean.
What is an earthquake?
A landslide made mostly of wet mud.
What is a mudslide?
This device measures volcano swelling to predict eruptions.
What is a tiltmeter?
The tool scientists use to measure earthquakes.
What is a seismograph (or seismometer)?
Molten rock after it reaches Earth’s surface
What is lava?
The Japanese word that means “harbor wave.”
What is tsunami?
This force pulls rocks and soil downhill.
What is gravity?
One safe action during an earthquake.
What is taking cover under a desk or table?
The scale used to describe the size of an earthquake.
What is magnitude?
The area around the Pacific Ocean with many active volcanoes.
What is the Ring of Fire?
Device placed in the ocean to detect tsunami waves
What is a tsunameter?
Wildfires can increase landslides because they remove this.
What is vegetation (or plant roots)?
Where boats are safer during a tsunami: shallow water or deep water?
What is deep water?
Loose, water-soaked soil that behaves like liquid during strong shaking
What is liquefaction?
A volcano that has not erupted in a long time but could erupt again.
What is a dormant volcano?
Why tsunami waves grow taller near shore.
What is the water becoming shallower (or the wave slowing and rising in shallow water)?
Structures built to hold back soil on slopes.
What are retaining walls?
One way communities reduce landslide risk on hillsides.
What is planting deep-rooted vegetation? (or building terraces/retaining walls)