Rivers and Streams Review

What best describes the relationship between particle size and water velocity as shown in the diagram?

• As particle size increases, slower water speeds will maintain movement of the particle.

• As particle size increases, water velocity will always stay the same.

• As particle size increases, faster slower water speeds will maintain movement of the particle.

• There is no relationship between particle size and water velocity.

According to the diagram, which type of particle requires the highest water velocity to maintain movement?

• Clay

• Silt

• Sand

• Boulders

What is the approximate stream velocity range required to maintain the movement of pebbles?

• 0.1-0.9 cm/s

• 1-10 cm/s

• 10-180 cm/s

• 500-1000 cm/s

Which particle size is associated with a stream velocity of 0.01 cm/s?

• Clay

• Silt

• Sand

• Pebbles

What does the generalized graph show about water velocity and particle movement?

• It shows the water velocity is needed to start particle movement.

• It shows the water velocity is needed to maintain, but not start, particle movement.

• It shows water velocity has no effect on particle movement.

• It shows water velocity decreases as particle size increases.

What do the small marks in between 0.0001 and 0.001 on the y-axis represent?

• 0.0002, 0.0003, 0.0004, 0.0005, 0.0006, 0.0007, 0.0008, 0.0009

• 0.001, 0.002, 0.003, 0.004

• 0.01, 0.02, 0.03, 0.04

• 0.1, 0.2, 0.3, 0.4

What is the range of particle diameter for silt?

• 0.0001 to 0.001 cm

• 0.001 to 0.01 cm

• 6.4 to 25.6 cm

• 0.0004 to 0.006 cm

What is the range of particle diameter for cobbles?

• 0.0001 to 0.001 cm

• 0.001 to 0.01 cm

• 6.4 to 25.6 cm

• 0.0004 to 0.006 cm

What is the approximate minimum water velocity necessary to maintain movement of 0.1-centimeter-diameter particles in a stream?

• 0.02 cm/s

• 5.0 cm/s

• 0.5 cm/s

• 20.0 cm/s

The process in which sediments, soil and rocks are added to a land form or land mass.

• erosion
• deposition
• mouth
• divide