River processes – Bingo! Student tasks 1. Select nine words/phrases from the list at the bottom of the page and write each one in a blank space in the grid below. 2. Listen as your teacher reads out some definitions. 3. When you hear a definition which relates to one of the words on your bingo card, put a neat cross through the key word. 4. Call out ‘Bingo!’ when you have either a horizontal or a vertical line or a full house. River Ashes Hollow in Shropshire © 2007 S Knights http://en.wikipedia.org/wiki/River_Ashes_Hollow erosion suspension hydraulic action abrasion traction valley attrition saltation vertical erosion deposition lower course long profile corrosion gorge upper course lateral erosion transportation particle size © www.teachitgeography.co.uk 2012 20309 Page 1 of 2 River processes – Bingo! Teaching notes 1. Make sure that all students have selected nine words/phrases from the list provided and written one in each of the blank spaces on their bingo card. 2. Read out the definitions below at random, keeping a tally of those which you have used. 3. If the students think they have the word/phrase which matches the definition, then they should cross it through on their bingo card. The three winners are the first with a horizontal line, the first with a vertical line, and then the first with a full house. 4. Check that the words on the winner’s bingo card match the definitions which you have read out. Key term Definition abrasion Rocks and pebbles wear away the bed and banks of the river. attrition Rocks and pebbles knock against each other becoming smaller. corrosion River water dissolves rocks and minerals e.g. chalk and limestone. deposition The river drops material which it has been transporting. erosion The wearing away of the bed and banks of the river. gorge A steep-sided, narrow rocky valley. hydraulic action The force of the water wearing away the bed and banks of the river. lateral erosion The sideways wearing away of the riverbanks. long profile A graph showing changes in height from source to the mouth of the river. lower course The section of the river where most deposition takes place. particle size A method for comparing the diameter of individual grains of sediment. saltation The process of small pebbles bouncing along the riverbed. suspension Very fine light material transported in the water. traction Large rocks and boulders are rolled along the riverbed. transportation The process of the river carrying material. upper course The section of the river where most vertical erosion takes place. valley The low area of land between hills or mountains. vertical erosion The downwards wearing away of the riverbed. Extension task: Using a large version of the River Ashes Hollow image (http://en.wikipedia.org/wiki/File:Ashes_Hollow_River.jpg), ask students to locate as many of the key terms as possible. © www.teachitgeography.co.uk 2012 20309 Page 2 of 2