Dynamic Planet B/C

[SpartyMavs]

EDIT: Also, are moraines depositional or erosional landforms?

Depositional

Last week I took an invitational test that had us categorize 26 features into 4 groups: erosional landform, depostitional landform, glacial process, and ice features. Most of it was very straight forward except for 4: glacial firn, glacial flour, piedmont glacier, and kettle lake. We said glacial firn was an ice feature but they considered it a glacial process. That makes sense to me but it seems both answers are correct. We said glacial flour was erosional but they called it depositional. Again I think this should be both as its eroded then deposited. Piedmont glacier made no sense at all. It didn't seem to fit any of the categories particularly well (we said ice feature) but they picked the one i thought made the least sense of all 4, erosional! Finally, kettle lake. I said depositional. They said erosional. Again I see this as both: the ice block is deposited but as it melts it erodes the ground. I just thought those 4 questions were ridiculous (along with a feel others later in the test that I'm not going to get into ).

[asquaredplusb]

Thanks! I agree, a lot of glacial formations seem to be quite ambiguous, in that they could technically be one or the other, depending on what stage of formation you look at.

A few more questions:

Are drumlins erosional or depositional? How about sheepbacks?
What kind of questions have yall seen about "glaciers as evidence of climate change"?

[Makeithappen]

Drumlins are depositional.

[Skink]

What kind of questions have yall seen about "glaciers as evidence of climate change"?

Among other things, if all glaciers melted, by how much would sea level rise? It's another way of asking how much water is in glaciers, really, and isn't exactly in line with that that section of the rules is getting at. I also have seen a graph with data taken over time that, in a nutshell, says glaciers have had a net loss in mass over the last n decades as a result of climate change. Stuff like that-

[Makeithappen]

Also in a nutshell sheepbacks are glacier movement can create these asymmetrical rock formations and hills. The glacier wears down the rocks gradually, forming one smooth, sloped side, but pulls r­ocks away from the other side as it passes over, forming a sharper, more jagged slope. These formations can be used to determine the direction of glacier movement. People once thought these looked like the backs of sheep, so they called them roche moutonnée, which is French for "sheep back."

[Shad160]

Anybody have tests for the test exchange? Pleeaaaase? Athens, 'Stoga, Wright State, anything ? I've taken an absurd amount of online quizzes and am itching for actual scioly tests

Heck, after States, I'll write some of my own to put up there

[Makeithappen]

Have you tried the New york State test posted? Maybe have a freind, or your event partner make you a test

[Shad160]

Mhm, the New York one posted was the first one we did. And yeah, we've started asking teammates for help in making tests too, since there's such a small amount of time left before NY States. I was just hoping that someone out there had a few tests to donate, though

[runnergirl]

Anyone find any other theories for ice sheet advance and retreat?
All I found was ,Variations in the energy output of the sun, volcanic eruptions filling the atmosphere with reflectors (particles and gas aerosols),
Changes in the circulation of seawater - Arctic/Atlantic ocean interplay; formation of Panama, and sliding of the West Antarctic Ice Sheet

Anything else...?

[Makeithappen]

Milankovich cycle. Green House Gasses