Earth History Final Test

What is the Ring of Fire?

• An area in the Atlantic Ocean where most earthquakes begin

• An area in the Pacific Ocean where most volcanoes are found

• An area in the Indian Ocean where most tornadoes begin

• An area in the Arctic Ocean where most volcanoes and earthquakes begin

Which of the following is true of volcanoes?

• They do not need magma to form

• They are full of lava at the base of the mantle

• They form where plates converge

• They form in a dry, humid area

Subduction is when...

• Two plates buckle up whey they collide

• continental crust moving over a divergent area

• a colliding plate goes under another

• Two plate diverge

Once a volcano has erupted, what builds up along the side and base of the volcano?

• magma

• cinder ashes

• molt

• lava

What is the mixture of gases and hot molten rock inside a volcano?

• molt

• eruptive material

• magma

• lava

When one tectonic plate moves under another tectonic plate, it is called....

• reduction

• preduction

• eruption

• subduction

Mountain ranges, ocean trenches, mid-ocean ridges, rift valleys and volcanoes are caused by....

• mountains eroding over time

• movement of tectonic plates

• movement of tree roots over time

• movement of sediment by constant wind

What is erosion?

• large rocks gathered at the base of a tree

• rocks sitting at the base of the ocean crust

• movement of plants and trees caused by tectonic plates

• movement of rocks, soil or materials

What is sediment?

• tiny particles of rocks at the bottom of the water

• itty-bitty particles of gases floating on the top of the mantle

• small fragments of wood

• large masses of debris floating atop the ocean

What determines the age of the rock layer?

• fault lines in the rock layer

• sedimentary rock deposits

• fossils

• tracings