EARTH SCIENE

• inverse square laws


  gravitational and electric force are similar because both are
• nebula


  cloud of gas and dust
• 1/6


  moon's gravity is _____ of earth's
• the bigger the mass, the greater the gravity
• stars - self luminous
• hottest stars - blue
• brightest star - sirius
• moon - not self luminous
• 28 days 


  every _______ days phases of moon
• year


  season depends on
• day


  daylight depends on
• moon


  earth was tilted 23.5 degrees because of collision with
• not all planets revolve on a star
• moon reflect stars light
• asteroid belt separates inner and outer planet
• comet has path and is predictable
• meteor - debris in space
• shooting star - meteor in earth's surface
• gravity


  planets formed because of
• gravity


  attracts moon to planet and planet to star
• gravity


  responsible for tides
• planetisimals


  tiny grains/ debris that is being gathered by gravity to form planet
• 365 and 1/4 day


  revolution of earth is
• planet criteria


  orbit around sun, big enough for enough gravity to be spherical and clear similar size objects near path to sun
• orbit


  path of planets
• endogenic processes


  beneath surface such as: tectonic process (folding, faulting and shearing), tectonic forces and volcanism
• exogenic


  degradation process (weathering, mass wasting, erosion, transportation)and aggradation process (deposition)
• the more exposed the rock, the more vulnerable to weathering
• carbonation


  observed in caves and acid rain
• water


  most powerful erosion agen
• mantle convection 


  primordial heat, decay of radioactive isotopes and tidal friction
• less pressure, the magma melts easier
• more volatile, less viscous, low meling point
• seafloor evidences


  deep sea drilling and magnetic strips
• continental drift evidences


  paleomagnetism and polar wandering
• granitic


  continent continent
• basalt


  spreading center
• andesite


  subduction zones
• carbon 14


  shortest half life
• uranium 238


  longest half life