Igneous
What is igneous rocks made of
Magma
How are sedimentary rocks formed?
They are compacted from small sediments that join together.
How do metamorphic rocks form?
Heat and pressure.
What is the main difference between weathering and erosion?
Weathering is the process of breaking rocks down into smaller pieces (called sediment) right where they are.
What is the simplest definition of erosion?
Erosion is the process of moving weathered rock, soil, or sand from one location to another by natural forces.
Can igneous rocks change into different rocks?
Yes, they can turn into either metamorphic and sedimentary
Are fossils found in Sedimentary rocks?
Yes they are
Can a rock melt during the process of metamorphism?
No; metamorphism is a solid-state process.
How can ice break a solid rock?
Through a process called frost wedging.
What are the four main "agents" or causes of erosion?
The four main agents are water, wind, ice (glaciers), and gravity.
What is the difference between magma and lava
Magma is melted rock while lava is created from presssure
What are some common examples of sedimentary rocks?
Sandstone, Limestone, shale
Does metamorphism involve melting the rock?
No. Metamorphism happens while the rock is still solid. If the rock melts completely, it becomes magma and will eventually cool into an igneous rock.
What is an example of "biological weathering"?
A common example is root wedging, where tree roots grow into cracks in a rock or sidewalk.
How does a river cause erosion?
As a river flows, the moving water picks up and carries mud, pebbles, and rocks downstream which forces the rocks to be destroyed.
Why are some igneous rocks more light colored than others?
The color depends on the mineral composition.
Do sedimentary rocks always have layers?
Yes, a distinct feature of recognizing sedimentary rocks is whether or not they have a "Striped look".
Which common metamorphic rock is often used for statues and fancy buildings?
What causes a rock to "rust"?
This is a type of chemical weathering called oxidation.
What is the difference between erosion and deposition?
Erosion is the moving of materials, while deposition is the dropping or laying down of those materials in a new spot.
Can igneous rocks float on water?
only 1 can called pumice.
How much of Earth do sedimentary rocks cover?
They cover about 75% of Earth's land surface.
What does the word "metamorphic" actually mean?
It comes from Greek words meaning “change of shape” or "change of form."
Why do rocks in a river often look smooth and round?
This is caused by abrasion where rocks constantly bump into each other and break.
How can plants help prevent erosion?
Plant roots act like a net or anchor that holds the soil together, making it much harder for wind or rain to wash it away.