yego.me
yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

What Are Tundras? | National Geographic

less than 1m read
·Nov 11, 2024

What are tundras? Tundras are among the Earth's coldest and harshest biomes. These ecosystems are treeless regions with extreme cold and low rainfall.

There are two different types of tundras: alpine and arctic. Alpine tundras occur on mountains where trees cannot grow in the high altitudes. There, the growing season is about 180 days. Mountain goats, sheep, marmots, and birds feed on low-lying plants and insects.

Arctic tundra extends from the edge of the Arctic Ocean down to the coniferous forest of the taiga. Permafrost prevents trees from taking root, but shrubs and other vegetation grow during the short summers, which range from 50 to 60 days. A variety of wildlife, including arctic foxes, polar bears, and caribou, live in the arctic tundra.

Global warming is changing the arctic tundra, and the changing tundra is contributing to global warming. The Arctic's permafrost is deteriorating, which alters not only the landscape but also the plants and animals that can live there.

In addition, permafrost contains about 14% of the Earth's carbon, so as it melts, that carbon is released into the atmosphere, contributing to global warming.

Examples writing decimals and fractions greater than 1 shown on grids
Breaking down photosynthesis stages | High school biology | Khan Academy

More Articles

View All
Channing Tatum Makes Fire | Running Wild With Bear Grylls
CHANNING TATUM: God, all these stones, man. Look at them. They’re just massive boulders. BEAR GRYLLS: Nope, it’s a dead end. So all of this area is endless, like, dead ends. You reach a cliff face or you reach a boulder you can’t get over, you try and go…
Examples of linear and exponential relationships
So I have two different XY relationships being described here, and what I would like to do in this video is figure out whether each of these relationships, whether they are either linear relationships, exponential relationships, or neither. And like alway…
Conditions for valid confidence intervals | Confidence intervals | AP Statistics | Khan Academy
What we’re going to do in this video is dig a little bit deeper into confidence intervals. In other videos, we compute them; we even interpret them. But here we’re going to make sure that we are making the right assumptions so that we can have confidence …
Worked example: Calculating molar mass and number of moles | AP Chemistry | Khan Academy
We are asked to calculate the number of moles in a 1.52 kilogram sample of glucose. So, like always, pause this video and try to figure this out on your own. This periodic table of elements will prove useful. All right. Now, if we’re trying to figure out…
End of Space – Creating a Prison for Humanity
Space travel is the most exciting and challenging adventure humanity has ever undertaken. But in an irony of history, we may stop ourselves from going into space the more we do it. With every rocket launched and with every satellite deployed, we’re creati…
Worked example finding area under density curves | AP Statistics | Khan Academy
Consider the density curve below. This density curve doesn’t look like the ones we typically see that are a little bit curvier, but this is a little easier for us to work with and figure out areas. They ask us to find the percent of the area under the de…