If lahars can travel at 100 kmph (60 mph), how much time would it take for a flow to reach the school closest to the summit?
What will be an ideal response?
32 minutes.
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Organic farming is more sustainable however the food produced costs more than that produced by industrialized agriculture. How can you justify the increased cost of organic food?
What will be an ideal response?
The downslope, unchannelized flow of water across the surface is known as
A) stem flow. B) evapotranspiration. C) throughfall. D) overland flow. E) infiltration.
A student commented, "A metamorphic rock must have a greater relative age than a sedimentary rock." Is the student using the term "relative age" here in the correct context, and why or why not?
A) No. Relative age must compare the age of at least three things. B) Yes. The ages of the rocks are ordered in relation to each other. C) No. Relative age should state a specific number of years in which the event occurred. D) Yes, the term is used in the correct context, however knowing how long ago these types of rocks formed would be useful.
The following diagram shows the relative position of some galaxies (2.5 Mly = 2.5 million light years). The location labeled "X" is the observation point.
Suppose these galaxies were observed at location X using the Hubble telescope. Place them in order from most red shift to least red shift.
A. B, A, C B. A, B, C C. C, A, B D. C, B, A