Natural Disasters

At what layer of the Earth does a volcano begin forming?

• In the mantle, below the crust

• At the hot inner core

• At the level of the crust

• A true volcano starts at the core and breaks through to the surface

What is magma called when it reaches earth's surface?

• lava

• still just magma

• liquid magma

• magnesium

Where do we find most active volcanoes?

• Along the Ring of Fire bordering the Indian Ocean.

• Along the Ring of Fire bordering the Atlantic Ocean.

• Along the Ring of Fire bordering the Pacific Ocean.

• Along the Ring of Fire bordering the Antarctic Ocean.

Earthquakes tend to occur on lines where tectonic plates meet. What are these lines called?

• Tectonic lines

• Faults

• Seismic lines

• Slips

There are 9 major tectonic plates

• True

• False

Fill in the blank with the best answer... Earthquakes occur when tectonic plates suddenly slip past one another, creating ______________________ that cause the ground to shake.

• rising magma

• a ripple effect

• seismic waves

• fault lines

Which of the following natural disasters change the surface of the Earth?

• Volcanic eruptions

• Earthquakes

• Landslides

• Hurricanes

What usually triggers a tsunami?

• An underwater earthquake

• Giant tides from the moon

• Underwater volcanoes

• Many things

List 4 reasons landlines can happen.

What is the effect of climate change on natural disasters?

• Climate change causes more volcanic eruptions.

• Climate change has decreased the frequency of many natural disasters.

• There is no effect

• Climate change has increased the frequency of many natural disasters.