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Quiz about Taken for Granite
Quiz about Taken for Granite

Taken for Granite Trivia Quiz


Geology rocks my world! Here are ten questions to spark your interest in the world beneath our feet.

A multiple-choice quiz by jry63. Estimated time: 3 mins.
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Author
jry63
Time
3 mins
Type
Multiple Choice
Quiz #
377,354
Updated
Dec 03 21
# Qns
10
Difficulty
Average
Avg Score
8 / 10
Plays
393
- -
Question 1 of 10
1. The molten rock that sits below the earth's surface is called what? Hint


Question 2 of 10
2. Which sedimentary rock reacts with hydrochloric acid? Hint


Question 3 of 10
3. A gneiss is what type of rock? Hint


Question 4 of 10
4. Which mineral has a hardness of 2 on the Mohs hardness scale? Hint


Question 5 of 10
5. The Red Sea is an example of what type of large-scale geological feature? Hint


Question 6 of 10
6. Australia's Uluru is a monolith composed of what type of rock? Hint


Question 7 of 10
7. A caldera is the result of what geological event? Hint


Question 8 of 10
8. The thin plate-like mica mineral muscovite was traditionally used for which purpose? Hint


Question 9 of 10
9. What are the names of the two main types of basaltic lava flows that occur on Hawaii? Hint


Question 10 of 10
10. Granite is mainly composed of which two minerals? Hint



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Quiz Answer Key and Fun Facts
1. The molten rock that sits below the earth's surface is called what?

Answer: Magma

Magma is generally formed via the partial melting of the Earth's crust and the upper mantle (athenosphere). The temperature range of magma is 700 - 1300 degrees Celsius, depending on its composition. Mafic magmas (high iron and magnesium) have a much higher temperature than felsic magmas (high silica).
2. Which sedimentary rock reacts with hydrochloric acid?

Answer: Limestone

The White Cliffs of Dover are made of chalk - a type of limestone. This limestone is composed dominantly of coccoliths (phytoplankton with calcium carbonate 'shells') and was formed during the Cretaceous Period (145 million years ago - 65 million years ago).
3. A gneiss is what type of rock?

Answer: Metamorphic rock

Gneiss is a metamorphic rock, which has formed under extremely high pressures and temperatures. Gneiss (pronounced 'nice') has a distinctive striped/layered appearance. The alternating layers are comprised of light-coloured felsic minerals (e.g. orthoclase) and dark-coloured mafic minerals (e.g. biotite). Gneiss is the highest grade regional metamorphic rock.
4. Which mineral has a hardness of 2 on the Mohs hardness scale?

Answer: Gypsum

Frederic Mohs was a German mineralogist who developed one of the most well-known and frequently used systems of mineral identification. In 1812 he gathered ten of the most commonly available minerals and tested their 'hardness', placing them in order from softest (1 - talc) to hardest (10 - diamond); thus the Mohs hardness scale was born.
5. The Red Sea is an example of what type of large-scale geological feature?

Answer: Continental rift valley

The Red Sea covers an area of approximately 450,000 sq km. The sea gets its name from the red-brown colour it becomes following the death of an invading algal bloom (trichodesmium erythraeum).
6. Australia's Uluru is a monolith composed of what type of rock?

Answer: Sandstone

Uluru is approximately 700 million years old and was named Ayers Rock when white settlers first discovered it in 1873 - Sir Henry Ayers was the Chief Secretary of South Australia. It is believed that Indigenous Australians first lived in the area surrounding Uluru approximately 10,000 years ago.
7. A caldera is the result of what geological event?

Answer: Collapse of a volcano

This collapse follows a volcanic eruption, after the magma chamber has emptied. A caldera formed after the 1883 eruption of Krakatau and a new volcanic island (Anak Krakatau) emerged from the caldera in 1927. This island remains a site of active volcanism.
8. The thin plate-like mica mineral muscovite was traditionally used for which purpose?

Answer: Window panes

Muscovite was mined in the 1700s near Moscow and used for window panes, due to its transparent nature. This glass became known as 'Muscovy glass'. Muscovy was the original European term used from the 1300s for the Principality of Moscow.
9. What are the names of the two main types of basaltic lava flows that occur on Hawaii?

Answer: Pahoehoe and a'a

Hawaiian Shield volcanoes produce low viscosity, high temperature basaltic lavas. The two key controlling factors that determine whether a'a or pahoehoe lava flows occur are the viscosity and cooling rate following an eruption. Fast cooling, high viscosity lavas form the rough, blocky a'a and slow cooling, low viscosity lava forms the smoother, ropey pahoehoe.
10. Granite is mainly composed of which two minerals?

Answer: Quartz and potassium feldspar

Granite is a coarse-grained intrusive igneous rock. The grain size of granite is determined by its cooling rate; slow cooling results in large grains/crystals. A batholith (or pluton) is a large granitic intrusion that exists below the Earth's surface and is formed when highly silicic magma intrudes pre-existing large scale weaknesses in the Earth's crust. Most batholiths are between 10 - 15 km thick.

The Idaho Batholith covers an area of 40,000 square kilometres.
Source: Author jry63

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