Quicksand

Quicksand formed when the water reduce the friction between sand particles.Therefore, the sand started to "move".The quicksand happen more frequently in few places,such as riverbank, beach, shoreline, near underground springs and swamps.



Resources:http://science.howstuffworks.com/environmental/earth/geology/quicksand1.htm

In some action movies,when a person drop into the quicksand,then person will sink into the sand and after than die.Movies give us a wrong concept.The density of human is 1g/ml,and the density of quicksand is 2g/ml.Compare to both density,human will not sink until cover the head but will
sink until the waist then stop.The situation that a person die in quicksand might probably because of too afraid and struggle try to go away from quicksand.Must remember the more you struggle in it the faster you will sink.So just relax yourself and try to move slow motion.This can reduce viscosity.Besides,extend arm and band down leg to increase surface area can lead to float up.



Reference: science.howstuffworks.com/environmental/earth/geology/quicksand.htm

Tsunami: The Aftermath

Before the tsunami happens in Thailand,a lot of people do not aware of what is tsunami or even never heard about it.When the tsunami came to Thailand,therefore a lot of people dead.

The movie "Tsunami: The Aftermath" used the Thailand tsunami as background to commemorate the victimcs and helps people raise awareness of the impact of the tsunami.Because of this,this movie received a lot of prizes such as Primetime Emmy Awards,Golden Globel Awards,Monte-Carlo Television Festival Awares,Imaga Awards,Befta Awards and Humanitas Prize.

The beginning of this movie,an english couple (Ian and Susie) take their daughter (Martha) go to Thailand for chrismis holiday.Bad dream happened after chrismas,the sudden came of tsunami cause a lot of people death.After tsunami,the english couple's daughter missing, the sametime an englishwomen (Kim Peabody) and his son (Adam) are looking for her husband (James) and elder son (John).

Because of too many people death,the goverment have to burn the death body or else will cause infection disease occur.But Ian feel that if those death body burned,their family didn't know whether their relative still alive or death.Therefore,he protect James's body because he don't let other to burn it.

At the end of the movie,Ian and susie can't find their daughter and they adoption a girl look like their daughter.









Reference: http://en.wikipedia.org/wiki/Tsunami:_The_Aftermath

The acid sea

Acid sea,this term of words might not familiar for us.As we normally know what is acid rain.The acid sea basically is carbon dioxide seeping into the ocean and slowly acidifying them.

In this situation,it does not mean that when we exhale then give out carbon dioxide and its pollute the ocean.The ocean will be acidified due to bilion tons of carbon dioxide.The main factors are forests been cutted down and indusrial revolution.The air and water offen exchange gases,therefore,pollution emitted into the atmosphere end up into the ocean.

As low pH value,a lot of aquatic animal eventually dead because of they can not live in the acidic sea water.

     

this picture show the carbon dioxide bubbles from the seafloor.If carbon dioxide continuely emission,many of the seafloor will be like this.http://www.ouramazingplanet.com/1830-seafloor-volcanic-vents-ocean-acifidication.html