Sunday, October 02, 2005
no don't worry i haven't fallen in love with the Shang dynasty. i just happened to miss the discovery channel feature on the Shang civilisation because i wasn't at home last night. damn it. school starts again tomorrow. what a spoiler. at least my mum approves of me going to sulin's house to study after school =D yay. my mum made a big fuss over the magazines i bought from kino. how careless of me to leave them on the desk. when i told her tha Cure cost me 15 (i already discounted 4 bucks off it myself in case my mum exploded)her eyes went big and round. and when i told her that fool's mate cost 20 (discounted off 1 buck) she was about to whack me. but i shan't care and i'll still get the next issue of fool's mate because dir en grey will be on the cover!!! =D guess i should go studymore geography. below are some geographic facts. i'm just trying to refresh my mind and recall whatever i've memorised yesterday ^^ note: i didn't cheat ok. didn't refer to any books. the below facts have been squeezed out of my brain, not subjected to any reference.
plates that carry the continents. examples: north american, african, antartic, eurasion.
plates beneath the oceans. examples: pacific, nazca, phillipenes (spelling error doesn't count) and carribean.
there are 3 types of plate movements.
1) divergent plate movement at constructive plate boundary.
when two oceanic plates move apart, hot molten materials well up from the earth's interior to form new ocean bed and mid-oceanic ridges. The new plates and ocean floor thicken with time as more molten materials well up, while the old plates forming the old ocean floors spread furthur. this is the process of seafloor spreading. volcanic activites are common.
example: mid atlantic ridge
plates involved: eurasion, american
features formed: volcanic islands, mid-oceanic ridges
process: sea floor spreading
2) convergent plate movement at destructive boundary.
when plates move towards each other, they either
a) slip past each other, causing tear faults that result in earthquakes but little volcanic activity.
b) OR, they collide into each other.
(oceanic plate and oceanic plate)
the edges of the two oceanic plates sink deep. they are bent into a deep trench known was the subduction zone.
(continental plate and oceanic plate)
the denser oceanic plate sinks under the continental plate.
example: Andes in south america
plates involved: south american and pacific
features formed: volcanic arcs, fold mountain system and trenches
(continental plate and continental plate)
neither plates sink because of similar densities. the continental lithosphere is buckled and is uplifted. fold mountains are formed. little volcanic ativity occurs because rocks from the lithosphere does not sink deep. Earth quakes, folding and faulting are common.
plates involved: indian and eurasion
features formed: fold mountains
3) plates sliding past each other at destructive boundary
two plates slip past each other and form tear faults. earthquakes form because of great amount of stress built up.
YAY!!!!!!!!!!!!!!!!!!!!!!!!!! I REMEMBER ALL. =D i'm not dumb like someone afterall. ^^
just did it at 1:21 PM