Sian

​ = Welcome to Sians Page = = = =media type="custom" key="5926675"= = __**week 1 reflection**__ =

== This week we have been looking at natural disasters to help me learn we have been looking at videos and seeing what impact these disasters can cause.it can leave lots of people homeless and UN well. I have also learn' t that even dust storms can be very dangerous. ==

Question 3: Which disaster is the most dangerous?
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**I think the most dangerous disasters are bush fires because if your talking about most dangerous it could also mean**
==**more likely to happen In most placers. So if that is what is meant then i think bush fires because they can occur in more places UN like tsunamis they are terrible but are most likely to happen around a island or somewhere surrounded by water.But if we are talking about most deadly then i think... they all can be very deadly it just depends on how bad they are and the impact of them.**==

== = What is a disaster = ==What i believe is a natural disaster is something that happens in the world that could be worthy of destroying any thing in its path depending on what the disaster is.it is also something that can be terrifying and horrific.== = What are the different types of disaster? =
 * ==There are lots of different natural disasters but these are the ones that seem to occur the most:==
 * ==land slides==
 * ==avalanches==
 * ==Tsunamis[[image:tornado-natural-disaster-400a061807.jpg width="255" height="255" align="right"]]==
 * ==Bush fires==
 * ==floods==
 * ==cyclones==
 * ==hurricanes==

and surprisingly volcano eruptions.
= = = __week 3 reflection__ =

This week the year 5s have gone on camp so i do not have to do any reflections
=** __week 4 reflection__ **= ==T**his week i have learned about how volcanoes are measured in mercalli and Richter scale and how the mercalli scale is how much damage the volcano causes and Richter is the strength of the volcano. i also learned that earth quakes can lead to other disasters like tsunamis, landslides, avalanches or even volcano eruptions. another thing that i have just leaned is that the earths core is hotter than the suns surface.**==

What do we use to classify disasters?
==We use the Richter scale so the strength of the disaster to classify. Also we classify by with one has the largest death toll like on black Saturday how they counted 200 and something people dead. There are also other terms used but i have no idea what they mean so i would not be putting my work in to my own words.==

= How are they measured? = ==Well the death toll is measured by how many body's are found or by people that have been missing for a number of weeks. But say in black Saturday people might of been on there properties and then realized that the fires where coming but just stayed in there houses. but neighbors and relatives might not not of none where they are and counted contact them and they where in a spot where the bush fires where then they would be marked down as dead. But say they where lucky enough to survive and it had been a few weeks just staying at there houses after the fires had come and gone and destroyed every thing but they needed some supply's so they went down to the shops and people saw them but thought they were dead but weren't so they got there names of the list.==

The Richter scale is measured by the intensity or strength of the disaster. So people would know what there dealing with
= = ==__ Week 5 reflection __This week i have learned abut how hot the earths core is and about the inside of the earth. i Have learned that just inside the crust of the earth is is already over 100 degrease Celsius, this spot is called the mantle. Then there is the core it gets over 3000 degrease Celsius! another thing i have learned about is the solar system and the main things about the planets.==

= What are the different layers of the earths structure? = ==Well the first layer of the is the crust this goes down hundreds of miles and no one has ever bean able to get through it. The next layer is the mantle it reaches temperatures over 100 degrease Celsius. The mantle has giant thick mettle plates. When the plates clash to gather this makes earthquake's. the next layer is the core this reaches temperatures over 3000 degrease Celsius! people think that the core is mostly boiling hot lave.==

= What resources do we use from beneath the earth? = ==From beneath the earth we can get coll for our trains, oil for out cars and gas to power things. We also need the diamonds for cutting and looking nice, copper, steal,uranium, god and silver. There are also salt mine but they are more closer to the top of the earth.== = Week 6 reflection = ==This week i have learned about the eruption of mount Fesuviouse in Pompeii. all the people in Pompeii were killed except the lucky people who escaped on ships. surprisingly the people died not from lava but from ether the poison gas or being buried in 3m of ash and pumice! I have also learned the 5 different types of volcanoes. The composite, shield, Cinda, spatter cone and complex volcanoes. the composite volcano is 250m high and 1000 m in with. when it explodes it has a massive explosion. The shield volcanoes are huge, they are mostly formed by flowing lava. the Cinda volcano is a steep hill that rather than spilling lava it vents out Cinders and ash. The spatter cone volcanoes can be 1 cm to 150 Cm's long. They are small volcanoes that has 1 vent that shoots out balls of lava. Finally the complex volcano has 2 vents and is almost like double volcanoes.==

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= __What are the different atmospheric layers above us?__ = ==There are 5 different atmospheric layer. The first is the ** Troposphere **which is the first layer above the earths surface and contains half of the earths atmosphere. This is where weather occurs. The second layer is the ** Stratosphere **. It is where planes fly through because it is very stable and it absorbs harmful rays from the sun. Next is the ** Mesosphere **. Meteor or rock fragments burn up in hear. Then there is the ** Thermosphere **. This is where we see auroras it is also where space shuttles orbit. Finally there is the ** Exosphere ** this is the upper limit of our Atmosphere.==

= __What effect does the sun and moon have on the earth?__ = == Sun: The sun effects many things on earth but one of the main tings is that the sun warms the earth, including the atmosphere. Also the energy drives most of our weather and provides light. The sun gives longer days in different parts of the world at different times depending on the angle of the earth that is facing the sun.== == Moon: The moon effects the ocean tides on earth. tides are created because the moon and the earth are attracted to each other like two magnets. The moon tries the pull anything it can get a hold of and the earth is able to hold on to everything except water. Because the water is always moving the earth can not hold on to it.==

= week 7 reflection = ==This week i have thoroughly learned about the different layers in the earths structure. At first i only new a small bit about the ozone layer, but now I know all its duties, like stopping asteroids hitting us by burning them up. Something amazing i have learned is when there is lightning the ozone layer is repairing it holes so harmful rays from the sun cant get to us and burn us.==

= __ How can whats in our solar system affect us? __ = ==Different thing in our solar system effects us in different ways. The sun effects us be giving us light and warmth so things on earth can grow and be healthy and the moon effects us by pulling on the oceans, producing tides. Asteroids can also effects the earth by coming down and crashing in to it [unfortunately].==

= __ How can comets meritorious ans asteroids effect us? __ = ==They can affect earth by crashing in to us but luckily that doesn't happen very often. If we did not have gravity on and around earth comets etc. could push the moon out of orbit and send it straight In to earth. Scary ha!==

=__ Week 8 reflection __= ==This week I have learned and read about how the sun was formed. It was born in a big cloud of gas and dust, This is how all stars are formed. It happened around 5 billion years ago. Over millions of years the gas and dust began to fall in to the center of the sun because the fores of its own gravity. The sun began to get hotter and hotter and when it reached around 1 million degrease its core ignited, when this happened it made its own light, heat and energy.==

= __ How do humans effect nature? How has humans use of land caused problems? __ = ==Well UN fortunately there are many more reasons than just one. We effect nature by cutting down trees and destroying forest, polluting our environment with rubbish and green house gases and because of the green house gasses in the environment we create global warming which kills plants and animals because it leads to much less rain and makes days far more hotter. Our use of land has caused problems in the environment by us cutting down trees to make buildings which also destroys animals habitats or by creating big cities that completely destroy the fauna that was once there.==

= __Week 9 reflection__ = ==This week i have learned about our planet. i have learned that the earth is not completely round, at the North and south ends of the world are flat. I have also learned that the earth, moon, sun,stars and other planets were formed around 4.5 billion years ago. They were formed by a huge cloud of gas and dust, the pressure and temperature of the cloud got so great it produced a huge amount of energy.==

= How are humans trying to reduce our effect on nature? = ==Well we have started recycling things more. For example we have began to use reusable bags when we go shopping ins-ted of plastic bags that take years to break down. Adding to that we have been building more recycling plants. We have also reduced our effect on nature by trying to reduce pollution by urging people not to just through there rubbish where ever they like and making them put it in the bin.==

= AND NOW FOR THE FINAL QUESTION!!!! = =**__Are we more dangerous to the world than natural disasters?!?!__** =

=No i don't think we are more dangerous to the world because we can cause some disasters like land slides, avalanches and some other ones that I cant think 0f for some reason but land slide and avalanches can __be very dangerous__ but most of the time they are not to bad unlike tornadoes, earthquakes and tsunamis that can destroy cities and kill millions of people, they are the top worsts disasters but we do not cause them. You might be wondering why I didn't put bush fires in ether of the categories. Well it because we do cause them but then we don't, confused? well from our pollution scientists believe we have created global warming that makes the atmosphere hotter. This can cause boiling hot summers that could create bush fires. We do kind of cause them because of that but then again its still nature, we also create bush fires by well being "careless" by say just throwing a cigarette away could create a fire or by electricity poles could fall and start a fire etc. but then does that really make them //__nateral__// disasters?= = =