These solid pieces of material are made of minerals.
What are rocks?
100
This type of sedimentary rock forms when water rich in dissolved minerals evaporate, leaving the mineral behind.
What is chemical sedimentary rocks?
100
A material formed from the remains of dead plants and animals that can be burned for engergy.
What are fossil fuels?
100
These small rectangular blocks are not rocks. They are made of clay and other sediments.
What are bricks?
100
When magma and lava cool, these can form.
What are crystals?
200
These rocks form when hot, melted material cools and hardens.
What are igneous rocks?
200
Sedimentary rocks sometimes contain these remains or evidence of an organism that lived long ago.
What are fossils?
200
Three types of fossil fuels.
What are oil, natural gas, and coal?
200
An open pit at Earth's surface from which certain rocks are removed.
What is a quarry?
200
This factor that causes rocks to change deals with "squeezing" sediments together.
What is compacting?
300
Granite and obsidian are two types of this rock.
What are igneous rocks?
300
The binding that holds sediments together.
What is cementation?
300
A sedimentary rock and type of coal that contains 70% carbon.
What is lignite?
300
This process began about 3,500 years ago and it makes bricks stronger.
What is firing?
300
The breaking up of rocks into sediments.
What is weathering?
400
These rocks form at Earth's surface when sediments harden into rocks.
What are sedimentary rocks?
400
These three things can cause a rock to "morph" into a metamorphic rock.
What are heat, pressure, and chemicals?
400
Also known as "soft coal", this is made up of 80% carbon and forms when lignite becomes buried deeper by sediments, causing the pressure and temperature to increase.
What is bituminous coal?
400
Large pieces of granite and marble are this type of of stone because they are removed in large slabs.
What is dimension stone?
400
This factor that changes rocks deals with the sediments bonding together to form new rocks.
What is cementing?
500
The layering of sediments.
What is bedding?
500
This type of metamorphism happens when hot lava or magma comes in contact with a rock. The temperature causes the rock to change.
What is contact metamorphism?
500
This metamorphic rock has the highest percent of carbon of all the forms of coal.
What is anthracite?
500
This type of stone is often used as filler in concrete, cement, and other building materials.
What is crushed stone?
500
Metamorphic rocks can change into igneous rocks when this takes place.