Rock Types
What are the 3 main types of rocks?
Igneous, Sedimentary, and Metamorphic
What is a mold fossil?
An imprint or hollow space left in rock.
What is a fossil?
The remains or traces of living things from long ago.
What is the rock cycle?
The process of rocks changing from one type to another over time.
What can fossils tell us about the past?
What plants and animals lived long ago.
Which type of rock forms from cooled lava or magma?
Igneous
What is a cast fossil?
A copy of the shape filled with minerals.
What type of rock do fossils usually form in?
Sedimentary rock.
What causes rocks to melt into magma?
Heat deep inside the Earth.
If fish fossils are found in a desert, what does that tell scientists?
The area used to be underwater.
Which type of rock often has layers and fossils?
Sedimentary
What is a trace fossil?
Signs of life like footprints or droppings.
What covers a dead plant or animal to start forming a fossil?
Layers of sediment.
What process turns sediments into sedimentary rock?
Compaction and cementation.
What can fossil footprints tell scientists?
How animals moved or behaved.
Which type of rock forms when heat and pressure change another rock?
Metamorphic
What is a true form fossil?
Actual remains that have turned to stone.
What happens to the soft parts of plants and animals during fossil formation?
They decay or rot away.
When magma cools and hardens, what kind of rock forms?
Igneous rock.
What can plant fossils tell scientists about Earth long ago?
The climate and environment.
What type of rock might form from volcanic activity?
Igneous
A leaf print in rock is what kind of fossil?
Mold fossil.
Put these steps in order: buried by sediment, dies, fossil forms, sediment hardens.
1) Dies, 2) Buried by sediment, 3) Sediment hardens, 4) Fossil forms.
What two forces can change any rock into a metamorphic rock?
Heat and pressure.
True or False: Fossils can tell us what color dinosaurs were.
False