Earth's Layers
Relative Dating
History of Earth
Rock Cycle
Spiral Review
100
The outermost layer of the Earth where we live
The crust
100
The oldest layer of rock
Layer D
100
The Earth is about _____ billion years old
4.6
100
Rock formed from slowly cooled magma
Intrusive Igneous rock
100
Molten rock found beneath the surface of earth
Magma
200
The thick layer beneath the crust that moves slowly (contains magma)
The mantle.
200
Law that states that the oldest rock layer is on the bottom and the younger layers stack on top
Law of Superposition
200
Division of geologic time larger than a period but smaller than an Eon
Era
200
Rock formed from heat and pressure
Metamorphic rock
200
Hot liquid or gas rise up and cold liquids or gas sinks down
Convection
300
Earth’s hottest layer made mostly of iron and nickel
Inner core
300
What event occurs before layer B is deposited?
Erosion
300
Era known as the “Age of Reptiles"/Age of Dinosaurs
Mesozoic Era
300
Rocks are made of one or more _________
Minerals
300
A change in organism's surrounding environment.
External Stimulus
400
This liquid layer creates Earth’s magnetic field
Outer Core
400
Which event is the last to occur?
Movement at fault A.
400
Known as the "age of mammals (humans) and flowering plants"
Cenozoic Era
400
Process that turns sediments into a sedimentary rock
Compaction and cementation
400
An ____________prevents heat from moving through it
Insulator
500
Name the layers of Earth from outside to inside
crust, mantle, outer core, inner core
500
Order that the rocks were deposited over time
5,4,3,6,2,1
500
This supercontinent existed about 300 million years ago and later broke apart, proving that Earth’s landmasses have changed over time.
Pangea
500
Process that breaks down and carries rock to a new location
Weathering and erosion
500
These detect changes in the environment and sends messages to brain for immediate behavior or storage of memories
Sensory Receptors