Biomagnification and DDT Concentration

The video tutorial addresses issues with accessing a biomagnification simulation, likely due to high demand. It provides a screencast to help students understand the simulation, focusing on the differences between zooplankton and phytoplankton, and the role of smelt. The tutorial guides students through setting DDT concentration levels, running the simulation, and analyzing the resulting data. It emphasizes understanding the food chain and observing trends as DDT concentrations change, particularly in zooplankton and pelicans.

What is the main reason students are having trouble accessing the biomagnification simulation?

• The simulation requires special software.

• Every student in the country is trying to access it at the same time.

• The simulation is only available during certain hours.

• The simulation is not available online.

What is the primary difference between zooplankton and phytoplankton?

• Zooplankton live in freshwater, while phytoplankton live in saltwater.

• Zooplankton are animals, while phytoplankton are plants.

• Zooplankton are larger than phytoplankton.

• Zooplankton are plants, while phytoplankton are animals.

What is the initial DDT concentration set to in the simulation?

• 0.00002

• 0.002

• 0.0002

• 0.02

What should you observe when the simulation runs to 750 ticks?

• The color of the water changes.

• The concentration levels in the graph and diagram.

• The simulation stops automatically.

• The simulation speeds up.

What trend is observed as you move up the food chain in the simulation?

• The concentration of DDT decreases.

• The concentration of DDT remains constant.

• The concentration of DDT increases.

• The concentration of DDT fluctuates randomly.

What is the new DDT concentration set to after resetting the simulation?

• 0.8

• 0.008

• 0.0008

• 0.08

Why is it important to compare the concentration in zooplankton and phytoplankton?

• To understand the impact of DDT on different organisms.

• To determine which is more colorful.

• To find out which one is more abundant.

• To see which one grows faster.

What is the final DDT concentration set to in the simulation?

• 0.001

• 0.01

• 1.0

• 0.1

How long does it take for zooplankton to reach a concentration of 0.1?

• A few hours

• A few seconds

• Several days

• Several minutes

Why do the times differ for zooplankton and pelicans to reach a concentration of 0.1?

• Zooplankton are faster swimmers.

• Pelicans are not affected by DDT.

• Zooplankton are smaller and accumulate DDT more quickly.

• Pelicans are larger and accumulate DDT more slowly.