The Kangaroo, the Duck, and the Iguana:
Kangaroo: Hey duck!
Duck: Hey!
Kangaroo: What are you doing?
Duck: I'm migrating, Quack! To Alaska, Quack!
Kangaroo: Oh my god! can I go, please?
Duck: Yeah I guess so.
Iguana: But kangaroo, you can´t go there, you'll die, its not your habitat!
Kangaroo: I don´t care! I'll go to Alaska even if it's the last thing I do.
Lest go Duck!
Duck: Alright, get on my wings!
They got to Alaska...
Duck: We made it kangaroo, we made it!
Kangaroo: Yeah...
Kangaroo died...
THE END.
Desert
A desert is a landscape or region that receives an extremely low amount of precipitation, less than enough to support growth of most plants. Deserts are defined as areas with an average annual precipitation of less than 250 millimeters per year, or as areas where more water is lost by evapotranspiration than falls as precipitation. In the Köppen climate classification system, deserts are classed as BWh (hot desert) or BWk (temperate desert). In the Thornthwaite climate classification system, deserts would be classified as arid mega thermal climates.
A desert is a landscape or region that receives an extremely low amount of precipitation, less than enough to support growth of most plants. Deserts are defined as areas with an average annual precipitation of less than 250 millimeters per year, or as areas where more water is lost by evapotranspiration than falls as precipitation. In the Köppen climate classification system, deserts are classed as BWh (hot desert) or BWk (temperate desert). In the Thornthwaite climate classification system, deserts would be classified as arid mega thermal climates.
Geography
Deserts are part of a wide classification of regions that, on an average annual basis, have a moisture deficit. Deserts are located where vegetation cover is sparse to almost nonexistent. Deserts take up about one third of the Earth's land surface. Hot deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures, and low nighttime temperatures. In hot deserts the temperature in the daytime can reach 45 °C or higher in the summer, and dip to 0 °C or lower in the winter. Water acts to trap infrared radiation from both the sun and the ground, and dry desert air is incapable of blocking sunlight during the day or trapping heat during the night. Thus, during daylight most of the sun's heat reaches the ground, and as soon as the sun sets the desert cools quickly by radiating its heat into space. Urban areas in deserts lack large daily temperature variations.
Many deserts are formed by rain shadows; mountains blocking the path of precipitation to the desert. Deserts are often composed of sand and rocky surfaces. Sand dunes called ergs and stony surfaces called Hamada surfaces compose a minority of desert surfaces. Exposures of rocky terrain are typical, and reflect minimal soil development and sparseness of vegetation. The soil is rocky because of the low chemical weathering.
Bottomlands may be salt-covered flats. Eolian processes are major factors in shaping desert landscapes. Polar deserts have similar features, except the main form of precipitation is snow rather than rain. Antarctica is the world's largest cold desert. Some of the barren rock is to be found in the so-called Dry Valleys of Antarctica that almost never get snow, which can have ice-encrusted saline lakes that suggest evaporation far greater than the rare snowfall due to the strong katabatic winds that evaporate even ice.
The largest hot desert is the Sahara in northern Africa, covering 9 million square kilometers and 12 countries.
The 10 largest deserts | |||
Rank | Desert | Area (km²) | Area (mi²) |
1 | 13,829,430 | 5,339,573 | |
2 | 13,700,000+ | 5,300,000+ | |
3 | 9,100,000+ | 3,320,000+ | |
4 | 2,330,000 | 900,000 | |
5 | 1,300,000 | 500,000 | |
6 | 900,000 | 360,000 | |
7 | 670,000 | 260,000 | |
8 | 647,000 | 250,000 | |
9 | 520,000 | 200,000 | |
10 | 492,000 | 190,000 | |
Tundra
In physical geography, tundra is a biome where the tree growth is hindered by low temperatures and short growing seasons. There are three types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. In tundra, the vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. Scattered trees grow in some tundra. The ecotone between the tundra and the forest is known as the tree line or timberline.
In physical geography, tundra is a biome where the tree growth is hindered by low temperatures and short growing seasons. There are three types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. In tundra, the vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. Scattered trees grow in some tundra. The ecotone between the tundra and the forest is known as the tree line or timberline.
aRcTIC TUNDRA
The Arctic tundra is a vast area of stark landscape and is frozen for much of the year. The soil there is frozen from 25–90 cm down, and it is impossible for trees to grow. Instead, bare and sometimes rocky land can only support low growing plants such as moss, and lichen. There are two main seasons, winter and summer, in the polar tundra areas. During the winter it is very cold and dark, with the average temperature around −28 °C, sometimes dipping as low as −50 °C. However, extreme cold temperatures on the tundra do not drop as low as those experienced in taiga areas further south. During the summer, temperatures rise somewhat, and the top layer of the permafrost melts, leaving the ground very soggy. The tundra is covered in marshes, lakes, bogs and streams during the warm months.
antaRcTIC TUNDRA
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| The tundra model I made |
Antarctic tundra occurs on Antarctica and on several Antarctic and subantarctic islands, including South Georgia and the South Sandwich Islands and the Kerguelen Islands. Antarctica is mostly too cold and dry to support vegetation, and most of the continent is covered by ice fields. However, some portions of the continent, particularly the Antarctic Peninsula, have areas of rocky soil that support plant life. The flora presently consists of around 300–400 lichens, 100 mosses, 25 liverworts, and around 700 terrestrial and aquatic algae species, which live on the areas of exposed rock and soil around the shore of the continent. Antarctica's two flowering plant species, the Antarctic hair grass (Deschampsia Antarctica) and Antarctic pearlwort (Colobanthus quitensis), are found on the northern and western parts of the Antarctic Peninsula.
In contrast with the Arctic tundra, the Antarctic tundra lacks a large mammal fauna, mostly due to its physical isolation from the other continents
In contrast with the Arctic tundra, the Antarctic tundra lacks a large mammal fauna, mostly due to its physical isolation from the other continents
alpine TUNDRA
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| The tundra model I made |
Alpine tundra is an ecozone that does not contain trees because it has high altitude. Alpine tundra is distinguished from arctic tundra, because alpine tundra typically does not have permafrost, and alpine soils are generally better drained than arctic soils. Alpine tundra transitions to subalpine forests below the tree line; stunted forests occurring at the forest-tundra ecotone are known as Krummholz.
Alpine tundra occurs in mountains worldwide. The flora of the alpine tundra is characterized by dwarf shrubs close to the ground. The cold climate of the alpine tundra is caused by the low air pressure, and is similar to polar climate.
I liked this week, because we made a role play and it was a fun process making it, I also learned about biomes and other things. I think I could’ve done better with my presentation.
Alpine tundra occurs in mountains worldwide. The flora of the alpine tundra is characterized by dwarf shrubs close to the ground. The cold climate of the alpine tundra is caused by the low air pressure, and is similar to polar climate.
I liked this week, because we made a role play and it was a fun process making it, I also learned about biomes and other things. I think I could’ve done better with my presentation.
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