Show:
Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Rocks From Reefs
Metamorphic Rocks/The Rock Cycle
100
These give a rock its texture.
What are its grains?
100
Igneous rocks are classified according to these three things.
What are origin, texture and mineral composition?
100
Small, solid pieces of material that come from rocks or living things.
What is sediment?
100
Skeletons of tiny sea organisms grow together to form this.
What is a coral reef?
100
These two things change igneous or sedimentary rocks into metamorphic rocks.
What are heat and pressure?
200
Low silica content magma produces rocks of this type of color.
What is dark?
200
This is igneous rock formed from lava.
What is extrusive rock?
200
This kind of sedimentary rock forms when minerals that are dissolved in a solution crystallize
What is a chemical rock?
200
Coral animals need this type of water environment to grow.
What is warm and shallow?
200
This is how geologists classify metamorphic rocks.
What is according to the arrangement of their grains?
300
Geologists observe these three things when studying rocks.
What are mineral composition, color and texture?
300
These two things are what are used to define the texture of igneous rock.
What are the size and shape of its mineral crystals?
300
This is a sedimentary rock that forms when rock fragments are squeezed together.
What is clastic rock?
300
Coral animals are relatives of these kinds of creatures.
What are jellyfish?
300
This word to describe some metamorphic rocks comes from the latin word for "leaf."
What is "foliated?"
400
The grains of conglomerate rocks have this shape.
What is rounded?
400
This type of igneous rock forms from magma.
What is intrusive rock?
400
These are the four steps of the process of the formation of sedimentary rock.
What are erosion, deposition, compaction and cementation?
400
These deposits provide evidence shallow seas existing where it is now land.
What are limestone deposits?
400
When limestone is subjected to heat and pressure, it turns into this.
What is marble?
500
These are the four minerals granite is made of.
What are mica, hornblende, feldspar and quartz?
500
This kind of igneous rock has coarse-grains and large crystals.
What is extrusive rock?
500
This is an example of a chemical rock. It is a form of limestone.
What is tufa?
500
This is the area of North America that was once covered with shallow seas.
What is central North America?
500
This is the series of processes by which rocks slowly change from one kind to another.
What is the rock cycle?