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