3rd Grade Earth Science Test Flashcards
(23 cards)
continent
one of the seven large land masses on earth
fault
crack in Earth’s crust
focus
place in Earth where the energy of an earthquake is first released
fossil
remains or imprints of an organism that lived long ago, preserved in rock
magma
hot, flowing rock below Earth’s surface
Pangaea
huge land mass that existed about 200 million years ago
plate
one of the sheets of crust and upper mantle that covers Earth’s surface
seismograph
instrument for measuring the strength of an earthquake
vibration
rapid back-and-forth movement
volcano
opening in Earth’s crust through which melted rock reaches the surface
Name the Layers of the Earth in order
core
mantle
crust
ocean floor spreading
the term used to describe the area where magma rises and new crust forms
Name the types of landforms
plateaus mountains valleys plains forests
Locations where earthquakes are most likely to occur
faults
where plates meet
mid-ocean ridges
Where does subduction occur?
between two oceanic plates
between two continental plates
between one continental and one oceanic plate
When does subduction occur?
when two plates collide
What does the term Ring of Fire refer to?
the area of volcanic earthquake activity around the Pacific Rim
What causes weathering
wind water waves temperature plants
Which forces change the Earth’s surface quickly?
earthquakes
volcanoes
landslides
Which forces change the Earth’s surface slowly?
erosion
glaciers
convection currents
the circular path of a gas or liquid as it heats and rises, spreads out, and then cools and sinks. (these are why the Earth’s plates are always moving).
weathering
the breaking down of rocks into smaller particles by wind, waves, water, temperature changes and plants
What is the Rock Cycle?
a model that shows how rocks form and change
