Changes to our planet and its ambiance (http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/oils/changesrev1.shtml)
Our changing globe
1aMatch anything from the list with each of the labels A, B, C and G on the plan of the Globe. atmospherecorecrustmantle
A= main B= mantle C=crust D=atmosphere
bFrom which parts of the Earth can we get our raw materials? Aatmosphere, core and crust
Batmosphere, crust and oceans
Catmosphere, core and mantle
Dcore, mantle and oceans
Alfred Wegener (http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/oils/changesrev2.shtml) 2aAbout one hundred years back there was a scientist referred to as Alfred Wegener. He found evidence the continents, including South America and Africa, had once recently been joined and after that drifted a part.
Use the diagram to suggest two pieces of proof that could be utilized to show the fact that continents got once been joined.
Similar Sedimentary rock and roll was found on both continents containing fossils and also the shape of the east side of south America plus the west side of The african continent fit like a jigsaw challenge.
Evidence for plate tectonics (http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/oils/changesrev3.shtml)
bAbout fifty yrs ago, new facts convinced scientists that the Globe's crust consists of tectonic china that are going very slowly. Give two pieces of data that have helped to convince these researchers that the tectonic plates are moving.
The movement and separation of continents and Earthquakes certainly are a result of plate movement. These are the sudden discharge of energy piled up when plates do not push smoothly earlier one another
Plate tectonics (http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/oils/changesrev2.shtml)
cDescribe as totally as you can what is causing the Earth's tectonic plates to move.
Correct below the strict outer level of the earth called the lithosphere, there may be molten ordinary. Since this liquefied is denser then the lithosphere pieces itself, the globe's tectonic plate's float at the top the liquids circulation of magma. Yet this happens at an extremely slow velocity moving a couple of centimetres 12 months
Structure of the Earth's atmosphere (http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/oils/changesrev4.shtml)
Evolution of the atmosphere
3aIn the Earth's atmosphere the percentage of carbon dioxide has always been at about zero. 03% for many thousands of years. The graph displays the percentage of carbon dioxide in the Earth's ambiance over the last 50 years. [pic]
iWhat was the percentage of carbon in the Earth's atmosphere in 1965?
iiWhat alter has took place to the percentage of carbon in the Globe's atmosphere during the last 50 years?
There is a massive increase in the amount of carbon dioxide and this shows a strong confident correlation
iiiSuggest one reason for this alter.
The increase could possibly be because of many rainforests and woodlands will be being demolished and plants which take in carbon dioxide in the process of photosynthesis, where along with sun light and drinking water convert this kind of carbon dioxide to oxygen and water
ivWhy does this transform worry some people?
As this kind of green house result is getting even worse every year this kind of greenhouse effect causes difficulties by raising the heat of the planet. Using the rise is usually not very much, but the Earth'sВ ecosystem is very fragile, and small improvements can possess large effects. This likewise causes global dimming
There are different theories about the Globe's early ambiance. bSome researchers believe the Earth's early atmosphere was mainly carbon and normal water vapour....