作者：Alexander cambrano de la cruz 4 年以前
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The first division between continents was made by ancient Greek navigators, who named them 'landmass, terra firma'.
Generally classified by convention rather than any strict criteria, nowadays seven regions are regarded as continents from a geopolitical point of view.
Antarctica is not only the coldest place on Earth but also the highest, driest, windiest and emptiest, completely covered with ice.
75% of the world's ice and 70% of the Earth's fresh water is located here.
Summer months of December to February give 24 hours of light, while the winter months of late March to late September are pitch dark the whole day.
There are no permanent inhabitants, except for scientists maintaining research stations in Antarctica.
Write down the temperatures of the Frozen Continent during the summer and the winter.
You can find on this continent:
North America has five time zones and it is the only continent with every type of climate.
North America was named after the explorer Amerigo Vespucci and is also known as the 'New World'.
The world's largest sugar exporter among the seven continents - Cuba - also called the 'sugar bowl of the world' is located here.
Native Americans have lived along this river and its tributaries for thousands of years. Most were hunter-gatherers, but some formed agricultural societies.
Formed from thick layers of the river's silt deposits, this river's embayment is one of the most fertile regions of the United States; steamboats were widely used in the 19th and early 20th centuries to ship agricultural and industrial goods.
Name this river.
The world's largest freshwater lake by surface area and the third-largest freshwater lake by volume can be found here. It provides a route for the transportation of iron ore, as well as grain and other mined and manufactured materials.
Large cargo vessels called lake freighters, as well as smaller ocean-going freighters, transport these commodities across this lake.
Name this lake.
There are 23 countries that make up North America.
Name as many of you can! Don't forget about their capitals.
Australia is the world's smallest continent and is also known as an 'island continent' as it is surrounded by water on all sides.
It includes 14 countries and it is the least populated continent.
Its name comes from the Latin word 'australis' meaning 'southern' because it lies entirely on the south of the equator.
maiz soya y sorgo híbridos
Of the seven continents of the world, Africa is the second largest.
Africa comprises 54 countries and it is the hottest continent.
The equator passes through the middle of Africa and it receives direct sunlight throughout the year.
The world gets 66% of its chocolate, 50% of the gold and 95% of the diamonds from Africa.
semi esencial:Argina ,glisina,histidina
no esenciales:Alamina,acido,glutaminico
no esenciales: Ag,Al,Av,Bi,Hh,etc
Frecuentemente toxicos: As,Cd,cu,F,Hg,Mo,Pb,Se,si
micro:co,cr,cu,f,mn,mi
Hiposolubles: vitaminas A,D,E y K
Diversos acidos libres
Esteroles
Terpenoides
ceras :cutina etc
Polisacáridos Fibrosos: homicelulosas, celulosas,etc
Disacáridos: azucares con dos moléculas simples
Oligosacáridos: azúcares con mas de dos moléculas.
Europe is separated from Asia by the Ural mountains and the Caspian Sea.
It is surrounded by water on three sides: Mediterranean Sea in the south, Atlantic Ocean in the west, and the Arctic Ocean in the north.
Three-fourth of the world's potatoes grow in Europe.
Fertilización Aplicada
Métodos Analíticos
