Types of Rocks
This type of rock forms when melted rock from a volcano cools and hardens.
What is igneous rock?
This is the name for the process that changes rocks from one type to another over time.
What is the rock cycle?
This is the process where rocks are broken down into smaller pieces by natural forces.
What is weathering?
This is the process of moving rock pieces or soil from one place to another by wind, water, ice, or gravity.
What is erosion?
This is the process where bits of rock, sand, or soil are dropped or left behind in a new place.
What is deposition?
This type of rock is made from layers of sand, mud, or tiny bits of other rocks pressed together over time.
What are sedimentary rocks?
When rocks break down into smaller pieces by wind, water, or ice, this process is happening.
What is weathering?
This type of weathering happens when water freezes in the cracks of rocks and breaks them apart without changing what the rock is made of.
What is mechanical weathering?
When a river or stream carries away soil and rocks, this type of erosion is happening.
What is water erosion?
After a river carries soil and rocks, it slows down and drops them off at the mouth, forming one of these.
What is a delta?
This type of rock starts out as another kind of rock but changes because of heat and pressure inside the Earth.
What is metamorphic rock?
When bits of rock are carried away by water or wind, this process is happening.
What is erosion?
This type of weathering happens when a rock’s minerals are changed by water, air, or acids.
What is chemical weathering?
This happens when strong winds pick up sand and tiny rocks and move them to new places.
What is wind erosion?
This landform can build up when ocean waves deposit sand along the shore.
What is a beach?
This type of igneous rock forms when lava cools quickly on the Earth’s surface, like after a volcanic eruption.
What is extrusive igneous rock?
When melted rock inside the Earth cools and hardens, it becomes this kind of rock.
What is igneous rock?
This type of weathering happens when plants or animals break rocks apart, such as tree roots growing into cracks.
What is biological weathering?
When ice moves slowly over land, picking up rocks and soil, this type of erosion is happening.
What is ice erosion?
Wind can drop sand in piles to form these large hills in deserts.
What are sand dunes?
Granite and basalt are examples of this type of rock.
What are igneous rocks?
When rocks are buried deep underground, heat and pressure can change them into this type of rock.
What are metamorphic rocks?
This factor often speeds up chemical weathering because warmer, wetter conditions help reactions happen faster.
What is climate?
This happens when gravity pulls loose rocks or soil downhill, often causing landslides.
What is gravity erosion?
Glaciers can leave behind piles of rocks and soil as they melt. These piles are called this.
What is a moraine?