General Science Flashcards
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Stream of high-energy particles sent into space
Solar Wind
(Northern Hemisphere)
Aurora Borealis
(Southern Hemisphere
Aurora Australis
Storms that look like huge arches; may last several days
Prominences
More intense than prominences; lasts only about 15 minutes
Solar Flares
Cool black storm areas
Sunspots
“Dirty snowballs”; heads of ice and rock, tails of dust and gases forced from the head by solar radiation
Comets
Chunk of rock or metal smaller than an asteroid
Meteoroid
A meteoroid as it burns up in the atmosphere; “Shooting Star”
Meteor
A meteoroid that does not completely burn up
Meteorite
Strongest tides; When the sun, moon, and earth are in a straight line; Highest and lowest tides
Spring Tides
Weakest tides; when the sun, earth, and moon form a right angle; moderate tides
Neap Tides
North star; tip of Little Dipper’s “handle”
Polaris
Brightest star in the night sky; “Dog Star”
Sirius
Big bear; Contains the Big Dipper
Ursa Major
Little bear; contains the Little Dipper
Ursa Minor
Big dog; contains Sirius
Canis Major
Little Dog
Canis Minor
The Hunter
Orion
Closest star to Earth but is too small to be seen in the night sky
Proxima Centauri
Closest star to Earth that is visible in the night sky
Alpha Centauri
The winged horse
Pegasus
The distance that light travels in one year
Light Year
The galaxy where the solar system is
Milky Way
The explosion of a big star
Supernova
Remains of a supernova explosion with very strong gravity from which nothing can escape
Black Hole
From the crust down to the rigid upper mantle
Lithosphere
Plates move away from one another, forming “mid-ocean ridges”
Divergent
Plates move toward each other
Convergent
Plates slide past one another, causing “Earthquakes”
Transform
One of the two oceanic plates is subducted into the mantle, magma rises, forming volcanoes, also creates trenches
Oceanic-oceanic
The oceanic plate is subducted into the mantle, magma rises, forming mountain ranges usually containing volcanoes
Oceanic-continental
Neither plate is fully subducted; the plates are forced into one another, forming tall mountains
continental-continental
he block above the fault has moved downward relative to the block below.
Normal Dip-Slip
a dip-slip fault in which the upper block, above the fault plane, moves up and over the lower block.
Reverse Dip Slip; Thrust Fault
a fault on which the two blocks slide past one another.
Strike-slip
“size” of an earthquake, or energy released; measured using the “Richter scale (1-10)
Magnitude
Amount of damage; measured using the Mercalli scale (1-12)
Intensity
An earthquake’s point of origin
Focus
The point on the Earth’s surface directly above the focus
Epicenter
From lava; e.g. granite, basalt
Igneous
From other rocks that were changed due to intense heat and pressure; e.g. marble, slate
Metamorphic
From sediments which were eroded to lower places; forms fossils; e.g. sandstone, shale
Sedimentary
Fossils in Africa and South America
Positions of mountain ranges
Glacial Striations
Tillites - Glacial sediments buried in rock
Proof of The Theory of Continental Drift By Alfred Wegener
Theory that tectonic plates move; explains continental drift
Theory of Plate Tectonics
The “supercontinent” that existed during the Paleozoic and Mesozoic eras; broke up into Laurasia in the north and Gondwanaland in the south during the Mesozoic Era
Pangaea
Started breaking up into Asia, Europe, and North America during the Cenozoic era
Laurasia
Started breaking up into Africa, Australia, Antarctica, and South America during the Mesozoic era
Gondwanaland
Will not run out due to continuous use
Renewable Energy Sources
In danger of running out
Non-Renewable Energy Sources
Energy sources that were formed by nature for hundreds of millions of years but which people are exploiting and may run out of in just a few more years
Fossil Fuels
The heating up of the earth’s surface due to a build-up of greenhouse gases
Global Warming
Melting of polar caps
Climate change
Effects of Global Warming
Air pressure
Barometer
Wind speed
Anemometer
Humidity
Hygrometer
Wind direction
Wind Vane
Amount of rainfall
Rain Gauge
Clouds become electrically charged, producing lighting and thunder
Thunderstorms
Up to 63km/hr winds
Tropical Depression
63-117km/hr winds
Tropical Storm
Pacific ocean origin; 120-350 km/hr winds
Typhoons
Atlantic Ocean origin; 120-350 km/hr winds
Hurricane
Indian ocean origin; 120-350 km/hr winds
Cyclone
small but about 500 km/hr winds
Tornadoes
Life forms, weather, densest layer
Troposphere
Ozone layer, airplanes
Stratosphere
Coldest, meteors burn up
Mesosphere
Ionosphere, hottest
Thermosphere
Man-made satellites
Exosphere