Wave action creates and changes beaches drastically. The sand that makes up beaches is transported along the shoreline by the following wave action. Waves typically approach shorelines at an angle rather than head on. Waves that hit the shoreline are then refracted perpendicular to the shoreline. The change in direction of a wave once it hits the shoreline transports sand grains along the shore. Water flow along shorelines is described with the following terms. Longshore drift is the net flow of water along the shore that results from waves that refract along the shoreline. Longshore drift is parallel to the shoreline in one direction. The direction roughly points towards the same general direction as sand transport and incoming waves. Upstream refers to the direction opposite of longshore drift. Rip currents are strong surface currents. Water that refracts from the shoreline can return out to sea along the surface or along the ocean bottom. Rip currents are the retreating waves that return along the surface. This type of current can be very dangerous to unwary swimmers.

Ahill is made of rock particles of different sizes. which of these agents of erosion probably caused the hill to form?

Directions you probably already know that people have different ways to organize their ideas. some people make lists or outlines, some draw pictures, while others may combine these two methods. experiment with different note-taking techniques to find the one which works best for you. one common note-taking technique is webbing. webbing uses the sizes of circles to indicate the importance of items. lines are used to indicate the relationships between items. the example below is based on the information presented in a previous lesson. notice that the circle for "geography is" appears at the center of the web. it has larger than the circles that surround it. the "geography " circle is surrounded by smaller circles of earth's atmosphere, earth's climate, earth's surface. notice the lines that connect these items to the concept of geography. notice that the circles surrounding atmosphere are smaller. also observe that the lines that connect the items and indicate the relationships between the items. webbing will you capture the most important points in your lessons. beginning with lesson two, geographic tools: globes and maps, use webbing to take notes on the important information in this unit. hint: it will be easier to complete this project if you take your notes after completing each lesson.

How many active volcanos are there in nicaragua