Questions: 25. What is the largest particle that can generally be transported by a stream that is moving at 200 centimeters per second? A) sand C) cobble B) pebble D) boulder

The answer is C) cobble.

Explanation for each option:

A) Sand - Sand particles are relatively small and can be transported by streams moving at much lower velocities than 200 centimeters per second. Therefore, sand is not the largest particle that can be transported at this speed.

B) Pebble - Pebbles are larger than sand particles and can be transported by streams moving at moderate velocities. However, at 200 centimeters per second, a stream can transport particles larger than pebbles.

C) Cobble - Cobbles are larger than pebbles and can be transported by streams moving at higher velocities, such as 200 centimeters per second. This makes cobble the largest particle that can generally be transported by a stream at this speed.

D) Boulder - Boulders are much larger than cobbles and typically require even higher stream velocities to be transported. Therefore, boulders are not the largest particles that can be transported at 200 centimeters per second.

In summary, at a stream velocity of 200 centimeters per second, cobbles are the largest particles that can generally be transported.