Continental Drift
What was the name of the supercontinent?
Pangea
True/ False
Oceanic crust is thinner than continental crust
What is true
What are paleozoic era, mesozoic era and cenozoic era
In what rocks do we find fossils?
sedimentary rocks
What are the three main types of rocks?
What are sedimentary, metamorphic and igneous rocks
What evidences from the land helped with the hypothesis of continental drift?
What are fossils, climate and land features
Tension between two plates create what?
What is an EARTHQUAKE?
Rank these from the largest to the smallest:
Period, epoch, era
What is ERA --> PERIOD---> EPOCH
The diagram below shows layers of sedimentary rocks and examples of their fossils. Which layer contains the oldest fossils?
What is layer 4?
How are metamorphic rocks formed? AND what types of layers do they normally have?
When older rocks (Igneous or metamorphic) change by heat or pressure. AND they normally have wavy layers
Long zipper- like chains of undersea mountains are called what?
What are mid-ocean ridges?
What is the driving force of Plate motion?
What are CONVECTION CURRENTS?
Geologic processes can be fast or slow. They can also be small scale or a large scale events. Describe what a tectonic uplift building on a mountain range would be.
What is A SLOW, LARGE SCALE EVENT
Scientist use relative and absolute dating or a combination of the two techniques to determine the age of fossils. What could be determined by combining both methods?
the difference in age between two fossils or which fossil is older?
What is the rock cycle?
Processes that on the crust or in the mantle that slowly changes rocks from one form to another.
Explain what happens during seafloor spreading?
Double Jeopardy
Plates separate and molten rock as flow up through a crack in the earth's crust and hardens into new igneous rocks.
What happens at a divergent boundary?
Sea floor spreading leading to the formation of mid-ocean ridges, rift valleys and even volcanic islands.
How are sedimentary rocks formed? (list all the steps)
(Double Jeoprady)
When sediments are weathering and erosion ---> Transportation---> deposition ---> Compaction ----> Cementation
After Seafloor spreading occurs where will the older rocks be?
farther away from the center.
Describe what happens at a convergent boundary?
(Double Jeopardy)
Two plates move towards each other. If oceanic and continental crust meet, the crust will be destroyed. Oceanic crust will be subducted which may result in large earthquakes and explosive volcanoes.
What process changes sedimentary rock to igneous rock?
When sedimentary rocks melt (lava) and cools they change and form igneous rocks.