Plate Tectonics and Volcanoes

Hotspots are found ___.

• at divergent boundaries

• at convergent boundaries

• at transform boundaries

• within a plate (intraplate)

Before lava reaches the surface, the molten material is called ____.

• rock

• magma

• volcanic ash

• liquid fire

Tags

NGSS.MS-ESS2-1

Molten material that leaves a volcano's vent is called ___________.

• gas

• magma

• lava

• liquid fire

The difference between magma and lava is _____

• where it is found (above or below the surface)

• how hot the molten rock is (lava is hotter than magma)

•  the type of boundary where it forms

• the viscosity of the molten rock (lava has a lower viscosity)

TRUE or FALSE: Volcanoes form along the mid-ocean ridges, where two plates move together.

If false change the underlined word to make it true.

• TRUE

• FALSE: apart

• FASLE: past each other

Tags

NGSS.MS-ESS2-3

Where does magma form?

• Crust

• Upper mantle

• Upper mantle and crust

• Asthenosphere

What do you call geographical regions with very high levels of volcanic activity, formed along the boundaries of Earth's plates?

• volcanic belts

• island arcs

• lava spots

• magma belts

Tags

NGSS.MS-ESS2-3

Which of the descriptions below is for an island arc?

• a curved chain of volcanic islands usually formed along converging plates where subduction takes place near a deep ocean trench.

• a major volcanic belt formed by the many volcanoes that rim the Pacific Ocean.

• Geographical regions with very high levels of volcanic activity, formed along the boundaries of Earth's plates

• an area where material from within the mantle rises and then melts, forming magma.

What do you call a weak spot in the crust where molten material comes to the surface?

• earthquake

• volcano

Lava is a molten material that has reached the surface of a volcano

• True

• False