Types of rocks
This type of rock forms when lava or magma cools and hardens.
What is igneous rock?
What do heat and pressure do to form metamorphic rock?
They change existing rock without melting it.
What is the rock cycle?
What is the process where rocks change from one type to another over time?
What physical property describes how a rock looks or feels on its surface?
What is texture
This type of rock forms from layers of sediment that get pressed together over time.
What is sedimentary rock
What type of rock forms when lava or magma cools and hardens?
what is igneous rock
What has to happen for any rock to become magma?
It must melt
What physical property describes how easily a rock can be scratched?
What is hardness
This type of rock is formed when heat and pressure change an existing rock.
What is metamorphic rock
What is the name of the process where rocks are broken down into smaller pieces by wind, water, or ice?
What is weathering
How can an igneous rock become a sedimentary rock?
It is broken into sediments, then compacted and cemented
What do we call the way a rock reflects light (shiny or dull)?
What is luster
Challenge question: Fossils are most commonly found in this type of rock.
What is sedimentary rock?
What is sedimentary rock made of?
What is rock, sand or mud
What two things can change a rock into a metamorphic rock?
Heat and pressure
What physical feature describes the size of particles or crystals in a rock?
what is grain size
This type of rock can form deep inside Earth when existing rock is changed by both heat and pressure, but it does not melt completely.
What is metamorphic rock
How is each rock formed?
Igneous: cooled magam/lava
metamorphic: existing rocks change over time
sedimentary: rock, sand, mud
What are all five steps of the rock cycle?
1. breaks into pieces from weathering
2. pieces get moved or layered
3. layers press together
4. rocks get heated and change
5. rocks melt
what are the two types of breakage and what do they look like
cleavage means it breaks in flat smooth pieces
Fracture means it broke unevenly or jagged