What are some of the techniques used to try to control floods? What will be an ideal response?
A floodway is a channel constructed to divert part of the excess water in a stream around an area
people want excess stream water to avoid. Floodwalls have gates that protect the land and can be
closed when floodwater rises. Reforestation of land reduces flooding potential
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Most of the energy that is consumed is passed on to the next trophic level so there is no need for a huge biomass in some areas
Indicate whether the statement is true or false
The three basic divisions of an ophiolite sequence are ____
a. upper mantle, lower continental crust, and sedimentary rocks b. oceanic crust, continental crust, and lower mantle c. upper mantle, upper continental crust, and sedimentary rock d. upper mantle, oceanic crust, and sedimentary rocks e. sedimentary rocks, oceanic crust, and continental crust
How much carbon dioxide was present in Earth's atmosphere 4 billion years ago?
A. Much more than now B. About the same amount as now C. Much less than now
What is NOT one of the reference features that the geographic grid is based on?
A. North Pole B. prime meridian C. plane of the equator D. South Pole E. rotation axis