2013年3月20日星期三

Shaking Our World

          Tectonic plates are science theory of lithosphere. It is developed by Alfred Wegener.Lithosphere is a piece of rock. They have oceanic and continental two plates. There are have major plate, North American plate, pacific plate, Philippine plate, Eurasioan plate, Arabian plate, Indian-Australian plate, Antiarctic plate, Nazca plate,Sandwish plate, Scotia plate, South American plate, Caribbean plate, Juande Fura plate, Cocos plate and Fiji plate. I agree with this theory because have some evidence recording the motion of tectonic plate.

            Plate boundaries are area of geologic activity, it caused many disaster. Such as earthquake and tsunami. There are 3 type of plate boundaries,convergent boundaries, divergent boundaries and tansform boundaries.Convergent boundaries are the two plate coming together.There are also know as convergent boundaries as Subduction Zones, it is happen when one plate goes under another plate. It cause trench or volcano.There are 3 type of convergent. When continental and continental plate coming together, it cuase mountain.For example Himalayas,when oceanic and oceanic plate coming together, it cause trench. When oceanic and contiental plate coming together, it cuase volcano.divergent boundaries are two plate moving apart. there are 2 type of divergent. When continental and continental plate moving apart, it cuase rift valley. When oceanic and oceanic plate moving apart, it cuase mid ocean ridge. Transform boundaries are the plate slide another plate. These are also known as transform boundaries as faults. It almost cause earthquake. The plate move about 3 inches in every year.

        Alfred Wegener first proposed the theory of continental drift. Continental drift is the slow movement described by the theory of plate tectonics.The fossil of the same kind of animals is support continental drift. In 220 million years ago,all plate are together, they all match each other.The earth are only a large of land. they call pangaea. Through a long long time, the plate slowly slowly move, they are move apart become now plate. The fossils of plateosaurus were found in both Europe&Asia and North America. The fossils of phytosaur and basalt were found in Africa,North America and Europe. The fossils of amphibian were found in India,Antatctica,South America,Africa and Australia. The fossils of rhynchosaur were found in the South America, Africa and India. There plate shape also can match together.These evidence support Alfred Wegener's continental drift.

         Convection currents within the earth are a contributing cause of volcanoes, earthquakes and continental drift.Activity of Earth's rocky mantle caused by convection currents.the molten rock about and moving the plates of the Earth's surface.The rock is rising up from the bottom of the mantle after becoming hotter and less dense from the heat of the Earth's core.As the rock loses heat into the earth's crust, it becomes cooler and more dense, sinking back down to the core.there circulating of hotter and cooler molten rock are thought to help heat the surface.Convection currents are caused by the very hot material at the deepest part of the mantle rising, then cooling, sinking again and then heating, rising and repeating the cycle over and over. As we known in the lsb, the hot water and blue water,you can watch the convection currents move in the liquid.

         I agree with this theory. Plate boundaries shows effect of plates.continental drift shows evidence of plaes are moving.convection currents shows reason of how plates moving.now known to be 4.6 billion years old of Earth. Also,I learn a lots important message of earthquake anf tsunami.It is very helpful for me.

Reflection:
1.I am very enjoy for made folder for this project.Because it is very creative.
2.I think most challenging part of me is doing the work on time.Because we spend time to research important message.
3.I learn be creative and organzie project and quickly to finish all thing on time.
4.I could improve my folder to special,because one of my folder looks a little noraml.
5.I would choose volcano to learn, becuase I don't exacly know about this topic.

2013年1月20日星期日

2012年10月29日星期一

Crystals & Minerals

Crystals gorwth
We learned that crystal growth in science class, we were learned two types of crystals. We created a solution by mixing minerals with water. We are get a pencil and tied the string in the middle.We put amount of minerals in a beaker with some water, when the water going heat that we put amount of minerals into the beaker and used tool to mixing it with the water.Finally, we put the beaker next the window and waiting it is cooling.The result is minerals becomes crystal. We were doing same thing with another minerals. We learn temperture affect the crystals growth.


Mineral properties
Luster
metallic- the minerals look like the metal
 nonmetallic - does not look like metal
 
 color -  the surface color of rocks
 streak - the color of minerals that streak in the streak plate
 hardness- a measure soft or hard of rock
cleavage- break of rock in evenly
 fracture- break of rock in unevenly
 composition- some mineral made uo to a  mineral

Mineral Identification
    Sulfur
Luster: nonmetallic
Hardness: 2
It is fracture
Color: yellow
Composition: S


luster: metallic
hardness: 6.5
it is break fracture
color: brassy yellow
composition: FeS2
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

2012年10月24日星期三

rock cycle

ROCK CYCLE
       The rock cycle is natural processes of rock change from different kinds of rock. The magma move up through the volcano change to the lava get cooling become the Igneous rock. The Igneous rock was through the weathering and erosion become the sediments. The sediments are compaction,then they glue all thing together become sedimentary rock. The sedimentary rock get heat and pressure becomes the metamorphic rock. The Mentamorphic rock through solid to liquid by heat to the lava. The rock cycle never stop.


ROCKS


Metamorphic rock - rock by heat or pressure
 

Magma- melting rock inside the earth

 Solidification- to become solid,very heat

Igneous rock- rocks that from when magma become cool and solid.
 
 Weathering process of breaking rocks into small peaces.
 Erosion- process of when materials are moved by weather

 Sediment- rock peaces

 Compaction- process of when the piece of rock getting together.

 Cementation- process when the piece of rock glue each other

 Sedimentary rock- from by another piece of rock running by water getting each other



ROCK TYPES
Sedimentary rock
Clatic - from by broken piece of rock and running with water meet with other piece of rock then stick together

 Crystalline - from by chemical make up

 Bioclastic - form in same way with clastic but it consisting with dead animals

 Igneous rock
Intrusive inside of volano make big crystals
 Extrusive - outside of volano make small ctystal

 Metamorphic rock
Foliatedoutside of a metamorphic rock has a line

 Non-Foliated - ouside of a metamorphic rock does not have a line

2012年10月16日星期二

about me

       Science is mystery subiect.
       I like cats.
       Ghost is very scares me.
       Ice cream and sushi are my favorite food.
       I will be a worker when I grow up.
       I have a brother. He is 15 years old.
       My favorite color is blue.
       My favorite thing to do is listen to the music and play with my friends.
       Watch out of my grades.
       I wish I will more better.