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30 Cards in this Set

  • Front
  • Back
What is the evidence of a once-living organism?
Fossil
The breaking of rocks into smaller pieces is called__________?
weathering
What do we call animals & plants that are no longer living?
extinct
What do we call a mixture of tiny rock pieces, decaying plants & animals, minerals, water and air?
soil
What is the process of wearing away rocks and moving pieces from one place to another?
erosion
Of the following items, which ones directly cause changes to the earth: volcanoes, recycling, earthquakes, weather, climate, living things, drinking pop?
Volcanoes, earthquakes, weather & living things
The idea of ________ is supported by the way the shapes of os South America & Africa fit together.
Pangaea
The theory of plate tectonics states that earth's _________ is made up of 9 large plates and a number of smaller ones.
crust
Cracks in the plates of the earth's crust, along which the plates move, are called ______.
Faults
The presence of _________ supported the theory of plate tectonics.
sea-floor spreading
The theory of sea-floor spreading explains how ______- move apart.
continents
Alfred wEgener's theory about how the earth's crust formed is called the theory of ____________.
Continental Drift
Most ________ form when living things die and their remains are buried by sediments.
fossils
Which of the following words does not describe catastrophic geologic change?
sudden, widespread, gradual, time
gradual
If a volcano's magma is high in silica, the volcano will probaby erupt _________.
explosively
When magma squeezes between layers of rock, it forms a dike or a sill?
sill
If geologiest detect many small earthquakes in the area near a volcano, what can they infer about the volcano?
It is probably about to erupt.
X
Y
Z These represent undisturbed rock layers. Which is the oldest layer?
Z
Benefits of volcano eruptions are increase in soil nutrients, forming new landforms like islands, and forming hot springs. True or False
True
The presence of similar _______ of plants & animals in South America & Africa support the theory of continental drift.
fossils
The ____________ time scale is a record of the life forms and geologic events in Earth's history.
geologic
How did Earth change about 2.5 billion years ago when some organisms began using photosynthesis to make food?
More oxygen
What is the age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passes? Older, Younger
Younger
The ________________ theory states that the continents ride atop rigid plates that move over the liquid part of the earth's mantle.
plate tectonics
Rock layers cut by a fault formed: before the fault, after the fault
before the fault
If Earth's history is put on a scale of 12 hours, human civilizations would have been around for: hours, minutes, seconds, or less than 1 second?
less than one second
If the __________ of an unstable element is 5,000 years, after 10,000 years only 25% of the parent material will be left.
Half-life
Dissolved gases trapped in the magma provides the force that causes ________ to erupt to the surface.
magma
What things do you need to study?
Plate tectonics, volcanoes & earthquakes
Where these easy questions?
If not, study, study, study!!! Remember the last 10 minutes before bed.