Chapter 8 - Minerals and Rocks

​ (a)   are natural, nonliving solid crystals that make up rocks.

• minerals
• rocks
• crystals
• ore

Scientists have identified over ​ (a)   minerals.

• 3,000
• 30
• 5,000
• 230

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Scientists use a special chart called the ​ (a)   for hardness.

• Mohs Scale
• Pentatonic scale
• Richter Scale
• Mercalli Scale

​ (a)   is the color of the powder that a mineral leaves when it is scratched on a special plate.

• streak
• luster
• orpiment
• talc

The eroded material that settles on land or on the bottoms of lakes, rivers, and oceans is called ​ (a)  

• sediment
• igneous
• metamorphic
• decay

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​ (a)   is made of hard skeleton and shells of sea animals that lived long ago.

• Limestone
• Mudstone
• Quartz
• Sandstone

Tags

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Fossils give scientists ​ (a)   .

• information
• contradictions
• incomprehension
• mystification

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The recycling of old rock into new is an ongoing process known as the ​ (a)  

• rock cycle
• crystal cycle
• mudstone cycle
• water cycle

Tags

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Rocks that have changed as a result of heat and pressure are known as ​ (a)  

• metamorphic rocks
• igneous rocks
• sedimentary rocks
• crystals

A ​ (a)   is a road that is built about water.

• causeway
• roadway
• highway
• cave