Ihave some questions. what is an invasive (alien) species. what is buffel grass. why is buffel grass an example of invasive species( how did it get to alice springs australia? ) what benefits have some people seen in buffel grass? how has this it’s spread? what is the impact of buffel grass on the environment around alice springs.

An invasive species is a species that did not originate in the land it resides or is not native.

Buffel grass is a weed that tends to be highly invasive.

Buffel grass is an example because it originally was grown in only tropical areas due to the fact that buffel grass can handle drought and heavy grazing. It has been brought to other areas and effects native species badly.

hello!

let's go through all of these words' definitions.

u-shaped valley - where the valley curves down like a u shape

corrie - similar to the hole created at the top of a volcano when it erupts, it's almost like a dent in a mountain

pyramidal peak - a mountain where the peak is very sharp, such as the matterhorn.

arete - two valleys separated by a thin mountain range

i'm going to assume you know how to read a topographic map, but in case you don't, feel free to comment.

now, let's figure out which one's which:

a - seems to be a mountain range separating two valleys, with a mountain running from top center to bottom center and two valleys on either side. therefore, i'd consider this an arete.

b - it looks like a dent into the mountain, like what a corrie is.

c - looks to be a valley, with two steeper sides curving up around the bottom of the valley which has a river in it. i would consider this an u-shaped valley.

hope this !

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