Question
J Harlen Bretz and Joseph Pardee showed that several of these events 15,000 to 18,000 years ago created the Channeled Scablands. For 10 points each:
[10m] Name these events that, due to climate change, threaten millions of people across the globe, especially those in the eastern Himalayas. Volcanic activity causes a type of these events called a jökulhlaup (“YO-kool-lahp”).
ANSWER: glacial lake outburst floods [or GLOFs; accept glacial lake outbursts or glacial outburst floods or glacial outbursts; accept outbursts/outburst floods from glaciers/glacier lakes; accept glacier in place of “glacial”; prompt on floods, outbursts, outburst floods, or Missoula floods; prompt on descriptions of floods caused by either glaciers or glacial lakes]
[10e] Glacial lake outburst floods can occur when one of these features damming the lake is breached. These features are formed as debris accumulates around a glacier.
ANSWER: moraines
[10h] Large-scale instances of these features that are nearly 20 feet high and spaced out by about 100 yards are evidence of the Missoula flood. The first woman to present a paper to the Royal Society was Hertha Ayrton, who presented her paper on these features.
ANSWER: ripples [accept giant current ripples, giant current ripple marks, ripple marks, “The Origin and Growth of Ripple-marks”]
<Other Science>
Summary
| 2023 ACF Nationals | 04/22/2023 | Y | 2 | 10.00 | 100% | 0% | 0% |
Data
| Georgia Tech A | Cornell A | 0 | 10 | 0 | 10 |
| Penn A | WUSTL B | 0 | 10 | 0 | 10 |