Rock Types
These are the three types of rocks.
What are Sedimentary, Igneous, and Metamorphic rocks?
These rocks form when magma cools and hardens.
What are Igneous rocks?
The longest lasting era that lasted 4 billion years is.
What is the Precambrian era?
This scientist started the theory of Pangea, that Earth was originally together as one continent.
Who is Alfred Wegener.
This is a solid mineral material found and formed three ways .
What is a rock?
This igneous rock forms above the ground
What is extrusive ?
This rock forms by heat and or pressure.
What is a metamorphic rock?
In this era modern humans appeared on Earth and dinosaurs became extinct.
What is the Cenozoic era?
Came up with the theory of Continental drift ?
Who is Holmes?
This happens when a rock gets dragged over a hard surface and leaves a visible mark.
What is streak?
These two types of rocks are likely to contain fossils.
What are Metamorphic and Sedimentary rocks?
This rock is formed when it gets compacted and cemented together.
What is sedimentary rock?
This period the dinosaurs went extinct.
What is the Cretaceous period ?
The man who learned how long it actually takes to form rocks.
Who is Hutton ?
This is the smallest particle an element can be divided into.
What is an Atom?
This igneous rock forms underground.
What is intrusive rock?
This happens when an Igneous rock weathers and erodes.
What are sediments?
This is the shortest era in earths history.
What is the Cenozoic era ?
This man discovered the tombstone layer .
Who was Alvarez ?
This takes up 90% of rocks on Earth's crust.
What is a Silicates?
This rock known as shale is a part of which rock group.
What is sedimentary ?
This happens when Metamorphic, Igneous, and Sedimentary rocks melt.
The second largest era .
What is the Paleozoic era?
The man who is known as the "father of geology" and figured out the earth is cooling down.
Who was Kelvin?
This is a substance that contains only one type of atom.
What is an element?