Maddylighting

​​​ MADDY'S PAGE :) !!!!!

what is a disaster ? A disaster is something bad that happens  more. A disaster can kill people and hurt them very bad.

Week 2 Refletion : ** This week I have learned a lot about natural disasters and what they are. Some natural disasters can be deadly to the world depending on where you are and depending on where the actual natural disaster is. **

what are the different types of natural disaster? Sink Holes volcornon earthquarks floods storms bazzders

week 4- Q.what is used to meaursed a natural disaster ? A richle scales are used to meaurse a natural disaster, the highest the scale go to are 0-10 Volcornons are meaused by volconic Eplosity index the scales high is 0-8. the saffir simpon is used to measure the scale from the disaster

refelection week 4 I have learnt that nauarl distsaer are very bad to people and the earth. I have also learnt that use wikispaces is a great way to work and show imfomtion I like working and adding stuff to my wiki i have learnt a lot using wikispaces I have learnt that there are lots of nauarl distaster indluing volcornons, sink hholes , earthquarks , storms, bazzders and many more. Week 5:

What are the layers of the earth's structure?:

The next layer is the mantle, which is composed mainly of ferro-magnesium silicates. It is about 2900 km thick, and is separated into the upper and lower mantle. This is where most of the internal heat of the Earth is located. Large convective cells in the mantle circulate heat and may driveplate tectonic processes.The earth consists of several layers. The three main layers are the core, the mantle and the crust. The core is the inner part of the earth, the crust is the outer part and between them is the mantle.

Reclection Week 5 : I have learnt about the earth struture the layers are mantle, the inter core , the outer core. I have learnt about the use of wikisapces and how it works I also learnt many more things about nauarl distaster using the computer and wikispaces.

​ Week 6 :

Understanding how weather works on our planet means we must first understand the atmosphere of our planet. Without our atmosphere there would be no weather; indeed, there would be no life on earth. The phenomenon of weather is simply an atmospheric effect. Atmosphere is the gaseous envelope surrounding the earth, held in place by gravity. It is a collection of four distinct layers, and several intermediate layers. These layers start at ground level, measured at sea level, and rise into what we call outer space.

reclection week 6 : I have learnt that narual distsater are very bad to family living and buildings I have learnt that Sink Holes and many more things.

Week 7 :

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 * How can what is in our solar system affect us? **

The next layer is the mantle, which is composed mainly of ferro-magnesium silicates. It is about 2900 km thick and is separated into the upper and lower mantle. This is where most of the internal heat of the Earth is located. Large convective cells in the mantle circulate heat and may driveplate tectonic processes.The earth consists of several layers. The three main layers are the core, the mantle and the crust. The core is the inner part of the earth, the crust is the outer part and between them is the mantle.

What is a tsunami?
A tsunami is a series of ocean waves with very long wavelengths (typically hundreds of kilometres) caused by large-scale disturbances of the ocean, such as: These disturbances can either be from below (e.g. underwater earthquakes with large vertical displacements, submarine landslides) or from above (e.g. meteorite impacts).
 * earthquakes
 * landslide
 * volcanic eruptions
 * explosions
 * meteorites

Tsunami is a Japanese word with the English translation: "harbour wave". In the past, tsunamis have been referred to as "tidal waves" or "seismic sea waves". The term "tidal wave" is misleading; even though a tsunami's impact upon a coastline is dependent upon the tidal level at the time a tsunami strikes, tsunamis are unrelated to the tides. (Tides result from the gravitational influences of the moon, sun, and planets.) The term "seismic sea wave" is also misleading. "Seismic" implies an earthquake-related generation mechanism, but a tsunami can also be caused by a non-seismic event, such as a landslide or meteorite impact. Tsunamis are also often confused with storm surges, even though they are quite different phenomena. A storm surge is a rapid rise in coastal sea-level caused by a significant meteorological event - these are often associated with tropical cyclones.

The physics of a tsunami
Tsunamis can have wavelengths ranging from 10 to 500 km and wave periods of up to an hour. As a result of their long wavelengths, tsunamis act as shallow-water waves. A wave becomes a shallow-water wave when the wavelength is very large compared to the water depth. Shallow-water waves move at a speed, //c//, that is dependent upon the water depth and is given by the formula: where //g// is the acceleration due to gravity (= 9.8 m/s2) and //H// is the depth of water.

In the deep ocean, the typical water depth is around 4000 m, so a tsunami will therefore travel at around 200 m/s, or more than 700 km/h. For tsunamis that are generated by underwater earthquakes, the amplitude (i.e wave height) of the tsunami is determined by the amount by which the sea-floor is displaced. Similarly, the wavelength and period of the tsunami are determined by the size and shape of the underwater disturbance. As well as travelling at high speeds, tsunamis can also travel large distances with limited energy losses. As the tsunami propagates across the ocean, the wave crests can undergo refraction (bending), which is caused by segments of the wave moving at different speeds as the water depth along the wave crest varies.

Well, as inhabitants of planet Earth, we are part of it. The Earth formed when all the other planets did the whole system was once one big disk of gas and dust, with a baby sun in the center. Gradually, the matter coalesced to form the planets. One of them struck the Earth very early on, and the debris from it and the Earth formed a ring, which became the Moon. Comets crashed on the Earth's surface and grazed its atmosphere, dropping all the water we have today, making life itself possible. The Sun drives the chemical reactions here, including those that make life possible. But it can also threaten humans, with solar flares another danger from space is an asteroid strike.





I had learnt happen the mantle and the upper and lower which is 2900 km thick and about tsunamis is a jaspanes word.


 * How do humans affect nature?**

We have great effect on the animal extinction because of global warming and garbage also digging up their habitat.

How do humans affect nature?

Human and natural activity can affect the earth and its environment in many different ways here are some of them:

· Plastic is not decomposable and making plastics and other decomposable wastes causes landfill which can cause pollution of the local environment such as contamination of groundwater.

· Radioactive waste produced by nuclear power stations can be dangerous in cases of radioactive contamination of a human body through ingestion, inhalation, absorption, or injection. Sea-based burial has caused damage such as it could leak and cause widespread damage.

Dumping of radioactive waste from ships has also caused contamination of islands in the Pacific.

· Deforestation, the destroying of forests, results from the removal of trees without replacing them. Deforestation could result in the depletion of the renewable resource wood and various organisms' habitats.

The photograph to the right is a NASA satellite observation of deforestation near Rio Branco in Brazil.

About half of the mature tropical forests, between 750 to 800 million hectares of the original 1.5 to 1.6 billion hectares that once covered the planet have fallen.

Throughout most of history, humans have considered forest clearing as necessary for most activities.

· Overfishing is another activity that could cause the depletion of a natural resource.

Most of the problems associated with overfishing have been caused in the last 50 years by the rapid advances in fishing technology. Overfishing can occur in any body of water from a pond to the oceans.

Deliberately underfishing to increase long term fish stocks has been proposed as a way fisherman can maximize their yields in the long run. · Large amounts of greenhouse gases being produced, such as carbon dioxide, are causing our planet to get warmer.

These gases allow sunlight to enter the atmosphere freely. When sunlight strikes the Earth's surface, some of it is reflected back towards space as infrared radiation but greenhouse gases absorb this infrared radiation and trap the heat in the atmosphere causing global warming.

Global warming is melting the ice caps causing the ocean level of our planet to increase, this causes flooding in many different areas of our planet.

Reclection Week 8 : I have learnt over the past weeks using wikispaces many things that I did not know before using wikispaces and the internet. I would want to use wikispaces agina I have learnt many more things over the weeks on wikisapces I have learnt about Sink Holes, Storms , Earthquarks , Volcornons , Bizzaders , Lighting , Upper Mantle , Lower Core , Inter Core , Upper Core. I have learnt a lot about Tsunamis, Tsunamis is a Japanese word with the English translation: "harbour wave". Tsunamis can have wavelengths ranging from 10 to 500 km and wave periods of up to an hour.

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