What is a Rock?

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What is the characteristic feature of granite?

Coarse-grained crystals

What is the common use of polished granite slabs?

Decoration of buildings

What is the colour of the crystals of feldspar found in granite?

White or pink

What is the term used to describe minerals that do not affect the classification of granite?

<p>Accessory minerals</p> Signup and view all the answers

What is the minimum size of crystals in granite?

<p>5 mm across</p> Signup and view all the answers

What type of rocks are used in the sport of curling?

<p>Granite</p> Signup and view all the answers

What is the primary mineral found in granite?

<p>Quartz</p> Signup and view all the answers

How do granite formations originate?

<p>Through slow cooling of magma</p> Signup and view all the answers

What happens to granite over time, especially in humid climates?

<p>It is easily weathered and decomposes</p> Signup and view all the answers

What can be found in the region surrounding a granite batholith?

<p>A variety of minerals, including tin, copper, and zinc</p> Signup and view all the answers

What process can expose granite at the Earth's surface?

<p>Weathering and erosion</p> Signup and view all the answers

What can cause the transformation of earlier-formed rocks into metamorphic rocks?

<p>Pressure and heat deep underground</p> Signup and view all the answers

What type of rock can be formed from mud and sand on the beach or in a riverbed?

<p>Sedimentary rock</p> Signup and view all the answers

What can sedimentary rocks become through geological processes?

<p>Both igneous and metamorphic rocks</p> Signup and view all the answers

What is the process by which magma cools to form crystalline igneous rock?

<p>Magma cooling</p> Signup and view all the answers

What is the location of magma?

<p>Underground</p> Signup and view all the answers

What do geologists sometimes call igneous rocks?

<p>Primary rocks</p> Signup and view all the answers

What is the characteristic of the crystals in igneous rocks?

<p>They are usually welded together</p> Signup and view all the answers

Where do intrusive igneous rocks form?

<p>Underground in large masses</p> Signup and view all the answers

What do extrusive igneous rocks build?

<p>Mountains of ash and dust</p> Signup and view all the answers

What is the texture of igneous rocks?

<p>Mosaic</p> Signup and view all the answers

What is a rock composed of?

<p>A mixture of mineral particles</p> Signup and view all the answers

How are the ages of rocks determined?

<p>By studying the fossils they contain or the breakdown of radio-active elements</p> Signup and view all the answers

What is the first step in the rock cycle?

<p>The formation of igneous rocks</p> Signup and view all the answers

What happens to sedimentary rocks if they are buried deep in the Earth's crust?

<p>They melt and become igneous rocks</p> Signup and view all the answers

What is the process of extreme heat or pressure that alters rocks?

<p>Metamorphism</p> Signup and view all the answers

Approximately how old are the oldest radiometrically dated rocks?

<p>3900 million years old</p> Signup and view all the answers

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