Radiometric dating definition for kids
Eventually, it would look like a square bull's eye with the center being the smallest square. As you go up in elevation, that circle will get smaller and smaller.Just like lines in the whipped cream, the lines here would completely surround the pyramid.Topographic maps are used by people like hikers and others who need to know what the elevation of an area is. Why are there so many, and why are they so crooked?This lesson will be looking at just that: We will cover what a topographic map is, what those lines are and how they work.After a while, you'll get tired and start to forget. This step with a big 50 painted on it means that you're now 50 feet above sea level. This information will either be printed on the map somewhere or you can figure it out by looking at the index contours.Well lucky for you, after your 50 stairs, you see a painted step that has a big 5-0 printed on it. Each index contour might only be labeled in two or three other places - it keeps the clutter down. Now, lines can (and often do) get really close to each other.Each line is a different elevation, but some of these lines have numbers on them. Index contours display the exact elevation of one specific line. Maybe you're at the Pyramids of Giza or one of those big concrete sports arenas or any other place where there's lots of steps. If you start hiking up the stairs, the tenth step up would be painted light brown. If you went up another 10 steps, there would be another step painted brown there as well. While we're focused on lines here, look at the space between any two lines. Contour interval is the distance between any two side-by-side lines.Not just in one spot, the entire step, all the way across. If you keep going, eventually you will probably lose count of how many steps you took. Go run stairs somewhere and try to remember what floor you are on, try a tall hotel stairwell. Why don't you have a seat, catch your breath and take a look around. For example, a contour interval of 10 means you would change elevation 10 feet up or down by crossing over those lines on the map. Every space between every line on that map would be 10 feet of elevation change, no matter how close or spread out those lines are.
A topographic map is a type of map that shows elevation.One different thing about topographic maps: They have rules. The closer those lines, the steeper the hill would be.