1st Marking Period CBA Study Guide Be able to: Determine elevation using a map Example- Foursquare Church Use a compass to determine bearing Example- bearing from LAHS to Mazepa Use a map scale to determine distance between 2 points on a map (for example if a scale is 1:24,000 and you measure 6 inches between 2 points, how many miles is that? Use Latitude location to determine distance from Equator Lewisburg is located at about 41 degrees North Latitude. Distance to equator? To North Pole? To South Pole? Calculate Percent Error You estimate a container to have 50ml of water, it actually has 47ml Calculate velocity of a stream A leaf floats 3meters in 35 seconds Calculate the volume of this same creek if it is 3 meters wide and 0.18 meters deep. Be familiar with pollution tests we did on local streams In class we have talked about 11 pollutants of water. Chose one. Write down its name and what causes it. What was the most common positive pollution test in your class? List and describe the 3 ways that streams transport material 1 2 3 know the meaning of qualitative and quantitative Calculate gradient of a stream (change in elevation divided by length of the stream) A stream begins at 800 feet elevation and ends at 500 feet. To find it’s length, the map scale is 1:24,000 and you measure 8 inches between begin of stream and it’s end, how many miles is that? Label the 6 PA watersheds Choose one of Pennsylvania’s watersheds. Name it, briefly describe where it is, and name at least 1 source of pollution found there that we discussed in class. What is acid mine drainage? Name at least 1 PA watershed with AMD (there are 4) Calculate stream depth using sonar equation A sonar takes .0112 seconds How deep is the stream there? Of all of the water on Earth, what percentage is in the Oceans (salt water)? What percentage is fresh water (streams and rivers)? Know the main cause of “hard” water Be familiar with pH scale. Below 7 = 7= above 7 = What is surface tension? What is the name of the type of bond that allows the Oxygen and Hydrogen in a water molecule share electrons?