Year 8- River

What is a watershed?

• Land that collects and channels water froma small body of water to a larger body of water
• the shape of the land determined by elevation
• A natural stream of water of considerable  volume
• a river and all its tributaries

What part of a river system does the image show?

• meander
• tributary
• delta
• estuary

These arrows point to ________________

• runoff
• pollutions
• Tributaries
• storm drains

_________ happens when runoff washes away the land.

• Flood plains
• Runoff
• Erosion 
• Ugly

***The use of pesticides and fertilizers must be carefully monitored because of the impact they can have on the environment. 
Which of the following is a possible negative effect of the use of these chemicals on the environment?

• Runoff carries these chemicals into lakes and streams.
• Theses chemicals cannot be purchased in large bulk.
• 
  These chemicals are expensive to produce.
  
• Storage space for these chemicals is limited.

Traction refers to the way in which material in the river's load are bounced along the riverbed

• True

• False

When soluble particles are dissolved into the river it is called:

• Hydraulic Action

• Abrasion

• Saltation

• Solution

Which Process involves small pebbles and stones being bounced along the river bed?

• Solution

• Traction

• Saltation

• none of the above

Tiny particles such as silt are usually transported:

• in solution

• in suspension

• by saltation

• by traction

The load of the river is all the materials carried by the water

• True

• False