Rivers

Every river begins from

• a mouth
• a source
• a plain
• a mountain

We can divide the river course into

• four parts, the first, the second, the third and the fourth
• three parts, the mr Imbò's one, the Ms Daminato and the Ms Moro's ones
• three parts, the upper, the intermediate, and the lower course
• three parts, the upper, the middle and the lower course

Every river has processes of transportation, which are

• solution, suspension, corrasion and saltation

• solution, suspension, saltation and attrition

• solution, suspension, saltation and traction

• solution, hydraulici action, corrasion and traction

Solution is

• a process of erosion and a way in which the river carries dissolved minerals
• just a process of erosion, who are you kidding?!
• a process of transportation in which dissolved minerals are carried along the river course
• a process of depositon

The material that a river carries is called

• load

• mouth

• stones

• river bed

Read the definition and identify it: "The process of transportation in which the lightest particles of soil and sand that make the river look cloudy as are carried along, is called .."

• solution

• suspension

• saltation

• traction

You have "traction" when

• the transported minerals are dissolved in the water

• smaller particles such as stoned bounce along the river bed

• the heaviest particles - large stones and rocks - roll along the river bed

• the lightest particles of soil and sand are carried along the river course

What are the four main processes of erosion?

• Hydraulic action, abrasion, attrition and solution

• Hydraulic action, corrasion, saltation and solution

• Hydraulic action, abrasion, attrition and saltation

• Ask Ms Daminato, I can't be bothered!

Hydraulic action is when

• sand and stones rub against the bank and bed and knock off other particles

• the force of the water knocks particles off the banks and the river bed

• boulder and large stones carried by the river collide with each other and break into smaller pieces

• when acids in the river dissolve the rocks that make up the bank and bed

When does deposition occur?

• When the river slows down, for example when it spreads out or a moutain slope
• When the river slows down, for example when it spreads out a wide valley or when it flows into a lake
• When the river is flowing in the upper course
• As ms Moro