Students noticed that a nearby pond, fed by a single stream was filling up with sediment. The students want to determine what factors are contributing to the amount and type of sediment entenng the pond. Which investigation
is most likely to produce data that will help answer their questions?

A. Measure the depth of the sediments in the center of the pond once a week during the school year.

B. Collect and measure the mass of particles carried by the stream in one minute and then in ten minutes.
C. Collect and measure the mass of clay particles, silt partides, sand grains, and small pebbles carried by the
stream at different stream How velocities.

D. Obtain samples from different depths in the sediments at the bottom of the pond and determine how the sizes
and amounts of particles have changed over time.