Shared Flashcard Set

Details

exam
2nd half
18
Science
8th Grade
05/18/2010

Additional Science Flashcards

 


 

Cards

Term
define transverse waves and surface waves
Definition
transverse waves, waves in which the particles vibrate in and up and down motion
Term
define wave speed
Definition
the speed at which a wave travels through a medium
Term
define crest
Definition
the highest point of a wave
Term
define medium
Definition
a material through which waves can travel
Term
what are the properties of waves
Definition
amplitude, wavelength, frequency, and wave speed.
Term
what is the amplitude a wave related to?
Definition
is related to height
Term
what is the wavelength of a wave related to?
Definition
is related to distance
Term
at what rate do techtonic plates move along the Earth's surface
Definition
millimeters per year
Term
what causes earthquakes?
Definition
the movement of techtonic plates release vibrations that travel through the ground
Term
how do surface ocean currents affect global temperatures.
Definition
they move thermal energy from the midlatudes to the equators
Term
list the steps of the carbon cycle
Definition
the carbon cycle consists of photosynthesis, respiration, combustion, and decompostion
Term
during the nitrogen cycle, bacteria in the soil changes ___ into a form plates can use
Definition
nitrogen
Term
name the two main gases that make up our atmosphere
Definition
nitrogen (78%) & oxygen (21%)
Term
what results from the greenhouse effect?
Definition
is when the greenhouse gases are trapped in the atmosphere and heats up the earth.
Term
define conduction
Definition
the transfer of heat energy as heat though a material.
Term
define convection
Definition
the transfer of heat energy as heat through a material.
Term
each parent gives one set of these to the offspring
Definition
one set of genes
Term
what is the advantage of sexual reprroduction?
Definition
genetic variation
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