Igneous Rock

What is an igneous rock? 

• rock that forms from magma & lava
• rock that forms from weathering and erosion
• rock that forms from weathering and compaction
• rock that forms from heat and pressure

What does “igneous” mean? 

• cooling
• Ice
• fire
• pressure

How are igneous rocks classified? 

• color, sharp edges, & mineral composition
• color, texture, & mineral composition
• Luster, texture, & mineral composition
• color, texture, & cooling temperature

What is an extrusive rock formed from? 

• lava ON Mars’ surface
• lava IN Earth’s surface
• lava ON Earth’s crust
• lava ON Earth’s surface

What is the most common extrusive rock? 

• Slate
• basalt
• coal
• sand

Basalt forms much of the crust beneath what? 

• ocean floor
• space
• soil
• mountains

What is an intrusive rock formed from? 

• water ON Earth’s surface
• weathering from other rocks
• lava ON Earth’s surface
• magma UNDER Earth’s surface

What is the most common intrusive rock? 

• granite
• coal
• sand
• clay

What forms fine-grained (small crystals) igneous rocks?

• A person named crystal
• weathering by ice
• fast cooling lava
• slowly heated rocks

What forms coarse-grained (large crystals) igneous rocks? 

• fast cooling lava
• slow cooling magma
• weathering by ice
• erosion of sand