WorksheetsUnderstanding Igneous Rock Formation
Total questions: 10
Worksheet time: 5mins
What is the primary process through which igneous rocks are formed?
Sedimentation
Cooling and solidification of magma or lava
Metamorphism
Erosion
Which of the following is an example of an intrusive igneous rock?
Basalt
Granite
Pumice
Obsidian
What is the main difference between intrusive and extrusive igneous rocks?
Intrusive rocks form on the Earth's surface, while extrusive rocks form below the surface.
Intrusive rocks have larger crystals due to slower cooling, while extrusive rocks have smaller crystals due to rapid cooling.
Intrusive rocks are always darker in color than extrusive rocks.
Intrusive rocks are formed from lava, while extrusive rocks are formed from magma.
Which of the following is a characteristic of basalt?
Coarse-grained texture
Light color
Fine-grained texture
High silica content
What is the term used to describe the molten rock beneath the Earth's surface?
Lava
Magma
Sediment
Ash
Which of the following igneous rocks is known for its glassy texture?
Granite
Diorite
Obsidian
Gabbro
What is the primary mineral composition of granite?
Quartz, feldspar, and mica
Olivine and pyroxene
Calcite and dolomite
Halite and gypsum
Which of the following processes can lead to the formation of igneous rocks?
Melting and cooling
Weathering and erosion
Compaction and cementation
Evaporation and precipitation
What type of igneous rock is formed from lava that cools quickly on the Earth's surface?
Intrusive
Extrusive
Metamorphic
Sedimentary
Which of the following is a common use for pumice, an extrusive igneous rock?
Building countertops
Making jewelry
Polishing and cleaning
Road construction
