Rocks and the rock cycle - Grade 5

What is a rock?

• A natural solid that is made out of one or more minerals

• A manmade solid that is made out of one or more minerals

• A natural solid that is made out of one or more crystals

• A natural solid that is always made from one mineral

(a)   rock that forms when magma or lava cools and hardens.

The most common igneous rock is called ______

• Basalt

• Granite

• Limestone

• Shale

Which two rocks form beneath the earths surface and contain large crystals?

• gabbro and granite

• basalt and limestone

• obsidian and rhyolite

• shale and sandstone

Which of these rocks forms from cooling lava at the earths surface and has small crystals?

• rhyolite and basalt

• obsidian and gabbro

• obsidian and porphyry

• conglomerate and granite

Do igneous rocks that form underground have larger crystals than those that form at the surface? and why?

• Yes because the magma cools down more slowly underground, making larger crystals

• No because the magma cools down more slowly underground, making smaller crystals

• No because the magma cools down more quickly underground, making smaller crystals

• Yes because the magma cools down more quickly underground, making larger crystals

The magma below the Earth's surface can range in temperature from what to what?

• 7000°C to 12000°C

• 120°C to 700°C

• 12°C to 700°C

• 700°C to 1200°C

Tags

NGSS.MS-PS3-4

___________ ____ forms from particles that get cemented together under pressure

(a)  

(a)   is particles of weathered rock.

Which sedimentary rock is made from the finest sediment?

• shale

• conglomerate

• sandstone

• obsidian