Birth of Rocks

Most of the volcanoes in the world are ________.

• anywhere where there are mountains

• along the coast surrounding the Pacific Ocean

• in Mexico near Paricutin

When are landslides most likely to occur?

• when the hill is really steep

• when there are houses nearby

• when there is a strong wind

• when it hasn't rained for a long time

Tags

NGSS.MS-ESS3-2

Is it possible for a volcano to erupt anywhere? If so, why and how likey is it to happen?

Tags

NGSS.MS-ESS3-2

Rocks at the bottom of a mountain tend to be rounder than the ones at the top because _____.

• people carve the rocks into round shapes

• the rocks melt into round shapes

• the round rocks are heavier so they end up at the bottom of the mountain.

• as the rocks tumble down the mountain the edges become more rounded

Tags

NGSS.MS-ESS2-2

Why are some volcanoes shaped like a shield?

• The shield shape helps protect the volcano.

• The shield shape makes it easier for the wind to pass over them.

• They are made from runny lava that spreads out widely.

• They are made from thick lava that is really heavy.

A landslide is when ________.

• sand slides into an ocean.

• sleds are able to go down a hill on a snowy day.

• water is carried down a stream.

• rocks or soil slide down a slope

Tags

NGSS.MS-ESS2-2

Why do mountatins not last forever?

• Water pushes the mountain up higher

• Rock will break into smaller pieces and roll down the mountain.

• Mountains will explode after a long time.

• The mountain will get too old.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

True or False: Some volcanoes explode and some do not.

• True

• False

The two types of volcanoes are _____ and ______.

(a)  

Some ways that solid rock can break into smaller pieces include:

• Seeds and water can enter cracks in the rock. As the seeds grow they can break the rock.

• The wind blows and causes the rock to break.

• Water enters the rocks and expands when it freezes.

• Rocks tumble down the mountain and the sharp edges can break off.