Mid-Unit test - Lesson 5 Geology

An ________________________ volcano has not erupted for at least 10,000 years and is not likely to erupt.

• extinct

• active

• Dormant

An ________________________ volcano has erupted in the past 10,000 years and is likely to erupt.

• extinct

• active

• Dormant

A ________________________ volcano hasn't erupted for a long time but could erupt again.

• extinct

• active

• Dormant

Seafloor spreading is the process of oceanic plates moving _________________ very slowly.

• subducting

• converging

• together

• apart

When the seafloor dips down as one tectonic plates slides under another (subduction), a narrow, extremely deep valley trench called an ______________________ is created.

• subduction zone

• ocean trench

• mid-ocean ridge

• fault line

When oceanic plates move toward each other and form cracks in Earth's crust an underwater mountain called a ________________ is formed.

• subduction zone

• ocean trench

• mid-ocean ridge

• fault line

What are the numbers that describe the intensity of an earthquake called?

• Richter Scale

• seismic waves

• seismograph

What are the jagged up and down lines the show the energy of the seismic waves called?

• Richter Scale

• seismic waves

• seismograph

Geysers, volcanoes and hot springs all form along which TWO places?

• plate boundaries

• mountains

• ocean trenches

• hotspots

Volcano myths often explain activity by describing how _________________________ caused volcano related events .

• people

• global warming

• gods and goddess

• lava