Mystery Science: Birth of Rocks

When a growing seed slowly breaks rock apart, it's called...

• plant wedging

• root erosion

• ice wedging

• root wedging

Tags

NGSS.MS-ESS2-2

If you looked at rocks at the top of a mountain and at the bottom of a mountain, what might you see?

• The rocks at the top will be covered in snow.

• The rocks at the bottom will probably be smoother or rounder.

• The rocks at the bottom will be affected by wind erosion.

• The rocks at the top are probably bigger.

Tags

NGSS.MS-ESS2-2

This kind of rock forms from lava eruptions.

• slate

• lava rocks

• obsidian

• basalt

Will a mountain last forever?

• Yes, a mountain will last forever. It is made of solid rock.

• No, a mountain won't last forever. Thunder and lightning can make it crumble.

• Yes, a mountain will last forever. Rocks can never break apart.

• No, a mountain won't last forever. Ice wedging and root wedging break rock apart.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Rock that forms when minerals form from solutions or sediment from older rocks get pressed and cemented together.

• Sedimentary Rock

• Metamorphic Rock

• Igneous Rock

What rocks are created by melting and cooling?

• Igneous

• Metamorphic

• Sedimentary

Erosion, wind, and weathering form this type of rock.

• sedimentary

• igneous

• metamorphic

Tags

NGSS.MS-ESS2-2

What is magma?

• Molten material inside Earth that cools and hardens to form rock

• Material ejected from volcanoes during an eruption

• A type of crystal formed under high pressure

• A sedimentary rock that forms from crystallized elements

Tags

NGSS.MS-ESS2-1

Rocks that are "born from fire" because they are formed from lava or magma.

• Igneous

• Sedimentary

• Metamorphic

How did obsidian and pumice form?

• Molten rock inside the Earth hardened

• Lava from erupting volcanoes cooled and formed hard rocks

• Rocks inside the Earth were changed under heat and pressure

• Tiny particles of sand and shells were stuck together over time