Imagine a river that flows through steep mountain valleys and then across a gently sloping coastal plain to the ocean. Write a prediction of how grain size,
rounding, and sorting of the sediment deposited by the river will change from the mountains to the coastline. Explain why these changes will take place.
What will be an ideal response?
Grain size would decrease, rounding would increase and sorting would increase from the mountains to the coastline. As the material is eroded from the source, the energy of the eroding agent (wind, water) would leave behind larger grain sizes and pick up and carry the smaller ones toward the coast. This process would also sort the larger and very small grain sizes, increasing the sorting of the material. The transport of the grains would cause abrasion along the path and round any angular particles from source to site of deposition.
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Why do scientists consider any hypothesis valuable?
A) A hypothesis requires no further investigation if it is proved by the experiment. B) A hypothesis can be used to explain a conclusion even if it is disapproved by the experiment. C) A hypothesis requires no further investigation. D) A hypothesis may lead to further investigation even if it is disapproved by the experiment.
East Asia includes
A. China, Japan, Mongolia, and the Koreas B. All of Asia east of the Ural Mountains C. Siberia and China D. Japan, Taiwan, and South Korea
What religion did the indigenous peoples of Southeast Asia practice before the arrival of religions from elsewhere?
A) Islam B) Christianity C) Animism D) Hinduism E) Buddhism
While we are heavily dependent on the environment, we are not dependent on it for everything we need to stay alive and healthy.
Answer the following statement true (T) or false (F)