Science Sixth Grade Spring Exam SG Flashcards
(98 cards)
__________ created the hypothesis of Continental Drift.
Alfred Wegner
What are seismographs?
objects that detect earthquakes
What are epicenters?
points of earthquakes where is started
What are plates made of?
Plates are made of either continental or oceanic crust.
Why do plates move?
convection currents in the mantle
What are convection cells?where two plates slide past each other.
an area where a warm substance rise and cold substance sink
What are the names of the plate types?
Divergent, Transform, and Convergent boundaries
Divergent, Transform, and Convergent boundaries
Divergent
plate boundaries where the plates are moving apart
Transform
where two plates slide past each other.
Convergent
when two plates collide
What are the disasters each kind of plate boundary can produce
Divergent-earthquake and volcanoes
Transform-earthquake
Convergent-oceanic/continental earthquakes and volcanoes, oceanic/oceanic earthquakes and volcanoes, continental/continental earthquakes
Which plate boundaries cause subduction
convergent
What is the super continent cycle?
First, Columbia and then Rodinia.
What are hotspots and give and example?
Hotspots are plumes of hot material rising through the mantle at places other than the plate boundaries.
many hotspots are found in the Hawaiian Islands
Where is water found?
oceans=97%
groundwater=0.76%
freshwater=2.5%
Where is freshwater found?
glaciers and ice caps=70%
groundwater=30%
surface water=1.2%
What is water made of?
two hydrogen atoms and one oxygen atom
What type of molecule is water?
Water is polar and causes hydrogen bonds between water molecules
water cycle
Evaporation, Transpiration, Condensation, Precipitation, Infiltration
What do humans us freshwater for?
Agriculture (most)
Industrial (second)
municipal (least)
Irrigation Methods
drip irrigation is more efficient than spray irrigation or furrow irrigation
How is wastewater treated?
general process of filters and chemical treatment and then it goes into the ocean
Water scarcity – two kinds:
economic (human-caused, like infrastructure or pollution)
physical (just no water there)
drought-
period of abnormally low rainfall
Water Conservation Methods
Using drip irrigation, taking shorter showers, and collect rainwater
streams-
freshwater that flows in a channel, usually downhill