Lachie+Davine's+Thunderstorm

= Natural Disasters =

= Are humans more dangerous to the world than Natural Disasters? Yes and no for different reasons; No; No because, over the generations of Earth there has been more natural disasters than disasters humans have made. I believe the damage from; say a Tsunami or Earthquake; like i said before, over the generations and years of Earth, there has been lots more Tsunami's and Earthquake's than disasters humans have caused. The reason i think that is because............. Natural disasters; Avalanches, Earthquakes, Volcanic eruptions, Floods, Tsunami's, Blizzard's, Cyclonic storms, Droughts, Hail storms, Heat waves, Tornadoes and can be sometimes be a natural disaster depending on the situation, Bushfires. Bushfires are one of the most common disaster's with people lighting fires, they are called arsonists. Their is a big difference between how many Main Natural disasters their are compared to normal disasters. Yes; Yes because all of the waste that we humans are losing. One scientist exclaimed, "if we keep going at this rate, we will have no waste in 2060". It will be one of the most significant and most talked about news topc for decades to come still. = = __ Week 1 Reflection: __ = ==How to use a wiki space, how to put movies, photos, website links, information, and how to communicate with the class on wiki space.I also learned that the world is not round it is a bit squashed together. As the world turns different countries have a hotter climate. The world spinning makes the seasons because when the world turns around some countries come closer and further away from the sun. The country closer to the equator is the hottest country.== == = = = = =__ Week 2 Reflection: __= =Bush fires- South-Eastern Australia is one of the most bushfire-prone regions in the world. For thousands of years it was used by aboriginal Australians as a cure for harvesting food.The aboriginals had burned the bush regularly. Dry conditions and strong winds were enough to set off afire a-light. In Australia the worst three bush fires have taken more than 200 lives. On the 5th of January 1939, the temperature reached an incredible 56 degrees Celsius and in West New South Wales, in Wilcannia the temperature reached 50 degrees Celsius. Casula, in West Sydney it was 49 degrees Celsius. In Adelaide Rose it was 47.2 degrees Celsius, they were all on the same day! Seven people died on the evening of Tuesday the 10th of January as they tried to escape fires in their car.= =__**Questions:**__=

** 1. What is a disaster? A disaster is an incident happened that affects a lot of people, destroys vegetation and damages houses and other significant buildings.**
==** 2. What are different types of natural disasters? Some natural disasters are Avalanches, Earthquakes, Volcanic eruptions, Floods, Tsunamis, Blizzards, Cyclonic storms, Droughts, Thunderstorms, Hail storms, Heat waves and Tornadoes.**== == **3. Write up some information on the Natural Disaster you believe is the most dangerous.** **I believe an Earthquake is the most deadliest Natural Disaster because, an Earthquake can make a Tsunami, a Tsunami can make a Flood. Earthquakes, Tsunamis and floods are very dangerous.**==

=__** Week 3 reflection: **__=

**No homework due to grade 5's being on camp.**
= = = = =__** Week 4 reflection: **__= ==This week i have learned how earthquakes and Tsumani's are measured. The Mercalli scale is measured on damage. The Richter scale is measured on strength of the incident. The core of the earth is hotter the suns surface. The Richter sale of 4.0 is 1000 times less powerful as 7.0. I also learnt that their is tectonic plates under the ground holding all the lava in but when the tectonic plates hit each other it makes an earthquake, and then the lava comes out through the cracks to the volcano so it can erupt. I also learned that a volcano is never in-active. Lava is boiling hot.== =__** Questions: **__=

**2. How are they measured? The Mercalli scale is measured on damage and the Richter scale is measured on the strength of the incident. **
=__** Week 5 reflection: **__=

==Landscapes on the world have been mainly made by the action of weather on rocks. For thousands of years mountains have been worn by wind, rain and ice. Natural vegetation can be cleared by farmers to plough fields and grow crops where the soil and climate is suitable. Climate variations are recorded in the landscapes they have formed.==

__** World vegetation: **__**The earth can be divided into regions that have roughly the same climate. The tropical rain forest biome forms a belt to the other side of the equator.**
==__** Land use: **__**In Europe fresh villages were built near rivers which supplied fish and fresh water. The early farms grew until most of the valleys were cultivated. Rock and metal ores wee mined before roman times.**== ==__** Soil: **__In places where the ground is frozen for most of the time, soil is formed very slowly. Near the equator where the climate is warm and wet, soils form rapidly and are said to be ancient. The best farm soils are mollisols of the prairies and steppes, and spodosols of temperature forests, found in North Eastern North America.== ==__ Solar System: __ We live on a small rocky planet we call earth, which travels through space on a path, or orbit, around a star we call the sun. The Solar System is about a million times wider than earth. Solar means 'of the sun', and the sun if by far the most important member of the family.== ==The sun is about 740 times bigger than all other planets put together. Because of its great size, it has a powerful gravitational pull, and this pull keeps the solar system together and controls the movements of the planets. The solar system began about 4.6 billion years ago, when a cloud of hydrogen, helium and a tiny percentage of other elements started to mix into a cluster of stars. The 'empty' space between stars in fact contains hydrogen atoms and tiny grains of solid material.== ==In some regions of the galaxy the grains are found much closer together, forming dark clouds of gas and dust. These regions are called nebulae. The nebulae may take less than 100,000 years to change into a shining star.==

==__ Earth: __ A permanant carbon dioxide covering might have created a similiar atmosphere to that on Venus, turning Earths surface into a desert. The crust of the Earth is not an unbroken shell, but is made up of several giant plates of solid rock.== ==The plates are florating on the moving molten rock of the Earths mantle. Beneath the Earths surface is constantly changing because of the great forces created by these plates as they drift. If two plates move against each other the crust may be forced up in mountain chains. E.g. The Andes chain which runs down South America. In the middle of the oceans, ridges form where the sea floor is spreading as rock from the mantle wells up and forms new crust.==

== __**Jupiter:**__ It is by far the biggest planet, all other planets could squeeze inside it. It spins faster than any of the other planets, so that it's day lasts less than 10 hours. Jupiter is 90% hydrogen and 10% helium. It's core is hotter than the surface of the sun. Jupiter's area is 318 times bigger than Earth. The ring around Jupiter is about 6,500 km wide and 30km thick. It is 20,000 km around the ring. == == __The Planets:__ The planets are Mercury, Venus, Earth, Mars, Jupiter, Uranus, Saturn, Neptune and Pluto. A planet is a large body made of gas, metal and rock, that orbits a star. Mercury, Venus, Earth and Mars are rock and metal planets. Jupiter, Venus, Uranus and Neptune are mainly liquid and ice. Pluto does no fit in either category. ==

**1. What are the layers of the Earths structure? Core, Upper core, Mantle, Outer core and the Inner core. **
== **2. What resources do we use from beneath the Earth?** **Some resources are coal, oil, natural gases, petrol, precious metals, gems, minerals, chalk and green limestone. Some say that in 50 years petrol will run out. Companies pay car dealers to not sell any electrical cars so they can still get money from the petrol ordinary cars use. Humans eat different types of rocks.**==

__**Week 6 reflection:**__
==There are different types of volcanoes - composite, shield, cinder, complex and spatter. The composite volcano has snow capped peaks and is 2500m high and 1000sqm in surface. The spatter volcanoes spurt out lava balls, they are 1cm-50cm. There is no vents on the outside, only one through the middle called the caldera. There are no cinders or ash coming out, only lava. The complex is like the spatter, there is a tube in the middle of the volcano. Although there are vents on the outside. Some vents on the outside can make another volcano with the lava coming out.==

**1.What are the different atmospheric layers above us? Thermosphere, Mesosphere, Stratosphere and the Troposphere. **
== **2.What effect does the sun and moon have on the Earth? Sun: If there was no sun there would be no light and heat, so everybody would freeze to death within seconds. Moon: Without the moon Earth would wobble around. Also there would be no seasons, everyday would be different, from extremely cold to extremely hot. ** ==

__**Week 7 Reflection:**__
== __**Plate Tectonics:**__ 'Tectonic' comes from the Greek tekton meaning 'builder'. With the constant motion of the plates it explains many of the major processes of the Earth., such as the drifting of continents, mountain building and Earthquake and Volcanic activity. == == Much of the activity occurs at the edges, or margins of the plates. Down in the middle of the Atlantic Ocean floor is a ridge where Volcanic activity takes place. Along the ridge are cracks where molten rocks push up to form new crust. As the sea floor widens at the mid-ocean ridge, the other edge of the plate is forced down beneath the plate next to it, this is called a destructive margin. == == As the two plates are forced against each other, rock layers are crushed and folded. The sinking rocks melt and often cause Volcanic activity, this area is called the subduction zone. All oceanic crust is 200 million years old. There are four main layers in the crust. The top layer is made up of sand and mud laid down in the world's seas. Beneath it is a layer of basalt.== ==Then comes a layer of another dark rock called gabbro, and finally a thin layer above the mantle. Oceanic crust is about 11km thick. On average, continental crust is about 35km thick, but may be 50km thick under recently built mountains. The crust that forms the continent is far thicker than that which forms the oceans continent. There are 8 main plates and several smaller ones. There are 2 trenches and 2 ridges.==

1.How can what is in our Solar System affect us?
== 2. How can comets, meteors and asteriods affect us? If one of them hit Earth there would be a large part of Earth that would be disdurbed greatly. It may kill lots of Earth's population on how big it really is. It well be the end of the World if one big comet, meteor or asteriod hit Earth, the chances are high but also the chances are high that it will affect lots of us but not the end of the world. ==

__**Week 8 reflection:**__
== __**Tectonic plates:**__ There are ridges and trenches at the edge of a plate. New crust is formed at the ridges and destroyed at the trenches. As new crust is created in the mid-Atlantic, the North American and the South American plates are moving westwards. India continues to move northwards, and the Himalayas get higher as it collides with the Eurasian plate, which is traveling eastwards. The African plate continues it's drift to Northwest as the red sea opens up. When lava cools and hardened into rock, some minerals are magnetized in the direction of the Earth's magnetic poles at that time. The poles reverse after 400,000 - 500,000 years. The Atlantic plate widens up at 1-5cm each year. It has taken 200 million years to separate South America from Africa and create the Atlantic Ocean, and about 40 million years for Australia and the Antarctic to move.==