Earth Forces

The Earths crust is the....

• Closed to the core

• Thinnest layer

• Thickest layer

Choose which statement is correct. The Epicentre is....

• Where the Earthquake is the strongest

• The point on the earth's surface vertically above the focus of an earthquake.

• Both statements are correct

• Neither statement is correct

Aftershocks are...

• are earthquakes that follow the largest shock of an earthquake sequence.

• can continue over a period of weeks, months, or years

• Both are true

The mantel is where magma chambers are

• True

• False

Lava is only Lava when

• Its flows out of the valcano above the crust

• When its in the magma chamber

• when it cools and becomes rock

The Ritcher scale is logarithmic

• True

• False

Seismographs

• Measure the movement of the Earths surface

• are used to measure Earthquakes

• Both are true

The Mercalli Scale measures what?

• the desruction caused by Tsunmais

• the desruction caused by Earthquakes

• the desruction caused by Volcanic eruptions