Particle Size vs. Velocity Practice

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

• 0.02 cm/s

• 0.5 cm/s

• 5.0 cm/s

• 20.0 cm/s

Tags

NGSS.HS-PS2-1

What is the approximate minimum stream velocity

needed to keep a 6.4-cm-diameter particle in motion?

• 10 cm/s

• 50 cm/s

• 100cm/s

• 200 cm/s

What is the approximate minimum stream velocity

needed to keep a particle in motion that has a

diameter of 10 centimeters?

• 110 cm/s

• 325 cm/s

• 190 cm/s

• 425 cm/s

Tags

NGSS.MS-PS3-1

A stream’s velocity decreases from 100 cm/s to

5cm/s. Which size sediment particles will still be

transported by the stream?

• pebbles, sand, silt, and clay

• sand, silt, and clay, only

• silt and clay, only

• clay, only

A river's velocity slows from 100 to 50 centimeters

per second at a point in its channel. Which statement

best describes the transport and deposition of particles

at this point?

• Clay, silt, sand, pebbles, and smaller cobbles

  stay in transport; some cobbles are deposited.

• Clay, silt, sand, and smaller pebbles stay in

  transport; some pebbles are deposited.

• Clay, silt, and smaller sand stay in transport;

  some sand is deposited.

• Clay and smaller silt stay in transport; some silt is deposited.

The largest sediment particles that can be transported

by a stream traveling at a velocity of 200 centimeters

per second are

• boulders

• cobbles

• pebbles

• sand

7. A stream flowing at a velocity of 250 centimeters per

second is transporting sediment particles ranging in

size from clay to cobbles. Which transported particles

will be deposited by the stream if its velocity

decreases to 100 centimeters per second?

• A) cobbles, only

• B) cobbles and some pebbles, only

• C) cobbles, pebbles, and some sand, only

• D) cobbles, pebbles, sand, slit, and clay

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

8. The largest particles that a stream deposits as it enters

a pond are 8 centimeters in diameter. The minimum

velocity of the stream is approximately

• A) 100 cm/s

• B) 200 cm/s

• C) 300 cm/s

• C 400 cm/s

Tags

NGSS.MS-PS2-2

9. A stream flowing at a velocity of 75 centimeters per

second can transport

• A) clay, only

• B) pebbles, only

• C) pebbles, sand, silt, and clay, only

• D) boulders, cobbles, pebbles, sand, silt, and clay

What is the minimum water velocity needed in a

stream to maintain the transportation of the smallest

boulder?

• 100 cm/s

• 200 cm/s

• 300 cm/s

• 400 cm/s