Chapter 7
Chapter 7/8
Chapter 8/9
Chapter 9/10
Chapter 10
100
plates of the lithosphere float on this
What is the asthenosphere?
100
A sensitive edevice used to detect magnetic fields on the seafloor
What is a magnetometer?
100
Waves that travel the fastest through rock
What are P-waves?
100
This dating uses the properties of atoms in rocks and other objects to find their ages
What is Absolute?
100
The end of the Paleozoic Era was signaled by this
What is the mass extinction of land and sea animals?
200
The result of plate movement can be seen here
What is plate boundaries?
200
Currents inside Earth that might drive plate motion
What are convection currents?
200
The Richter scale is based on measurements of this
What is amplitude?
200
Geologic time is divided into units based upon types of these
What are organisms?
200
These are on the geologic time scale and are marked by major, striking, and worldwide changes in the type of fossils present.
What are Eras?
300
The presence of the same ______ and ______ on several continents supports the hypothesis of continental drift.
What are fossils and rocks?
300
In order to complete a convection current, the rising materilal must eventually ____ Earth.
What is sink back into?
300
This is what sticky,thicker lavas are rich in
What is silica?
300
The longest subdividion of geologic time
What is an eon?
300
If a species can adapt to a changing environment or ___ its descendants will survive
What is stay the same?
400
The boundary between two plates moving together
What is a convergent boundary?
400
These are formed whtn two continental plates collide
What are mountain ranges?
400
Determining the order of events and relagive age of rocks by examining the position of rocks in a sequence
What is relative dating?
400
Cenozoic Era life-forms include (three)
What is humans, reptiles mariene mammals
400
Scientists believe dinosaurs evolved from ___ during the Mesozoic Era
What are reptiles?
500
Seafloor spreading occurs
What happens when molten material eneath Earth's crust rises to the surface?
500
Forces that cause strike-slip faults
What are sher forces?
500
If the same sequence of rock layers is observed over a large area,
a large deposit of rock formed over a large area
500
A life-form in the Precambrian time
What is cyanobacteria?
500
The hard scales fo reptiles' skin helped them to retain water, enabling them to adapt to this climate during the Mesozoic Era
What is dryer?
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