Ch 3 - Our Fascinating Earth (3.5 - 3.10)

Name the three broad categories of rock.

What are the individual substances that make up rocks?

What type of rock forms when molten rock solidifies?

List the differences between extrusive and intrusive igneous rocks and give an example of each.

Name the well-known igneous rock that contains quartz, feldspar, and mica.

What do we call rock formed from sediments that have been pressed together?

What is a rough, crumbly rock sometimes used to make glass?

What rock is formed from mud or clay and is often ground up and used to make bricks?

What kind of rock is made from pebbles cemented together?

What is another name for rock salt?

What soft, white rock is formed from the cemented skeletons of microscopic sea animals?

What do we call any trace left in a rock by a plant or animal?

What is the only stone formed by living animals?

What do we call an igneous or sedimentary rock that has been changed by extreme pressure or heat?

What weather-resistant, waterproof rock is formed by metamorphosis of shale?

What is a beautiful rock that withstands weathering well and is commonly used for statues?

What do we call the rarest, most durable and beautiful gems?

Which gemstone is the hardest of all known minerals?

What do we call any rock containing a metal together with impurities?

What do we call metals such as gold, silver, and platinum that are known for their durability, rarity, and beauty?

What is the most commonly used metal?

What reddish-orange metal is a good conductor of electricity?

What do we call the hard, shiny, black coal that is expensive to mine?

What is the most common type of coal, also known as “soft coal”?