8th Grade Science Test 2

About 80% of the world’s earthquakes occur in the

• Alpine belt

• Indian Ocean belt

• circum-Pacific belt

• Middle Eastern belt

The earthquake zone stretching from southern Europe to Indonesia is the ______.

• Alpine belt

• Indian Ocean belt

• circum-Pacific belt

• Middle Eastern belt

Most of the earth’s surface is covered by deposits of sand and mineral fragments, usually laid down by water. These deposits are called _____.

• sediments

• silicates

• continents

• tectonic plants

The inner core of the earth is thought to be ______.

• gas

• liquid

• plasma

• solid

The scale that is considered the most reliable method for measuring the energy released by an earthquake is the ______ scale.

• EEW

• modified Mercalli

• moment magnitude

• Richter magnitude

The scale used to measure the damage an earthquake does is the _____ scale.

• EEW

• modified Mercalli

• moment magnitude

• Richter magnitude

Eighty-five percent of our earthquakes are _______ earthquakes.

• deep-focus

• shallow-focus

• intermediate-focus

• no-focus

A particle or block of solid volcanic ejecta is a(n) ______.

• aa

• pillow

• pyroclast

• pahoehoe

The middle of the earth’s three main layers is the _______.

• crust

• core

• mesoterre

• mantle

The earth’s outer layer made of solid rock is _______.

• crust

• core

• mesoterre

• mantle