Understanding Water Pollution

Della Science introduces water pollution using a model fish named Flash. The video simulates pollution by adding household items to water, demonstrating the harmful effects on aquatic life. Della then attempts to clean the polluted water using a filtration system with rocks, sand, and a coffee filter. The video concludes by analyzing the results of the filtration process, highlighting the difficulty of removing pollutants once they are introduced. The lesson emphasizes the importance of not polluting water bodies.

What is the main topic introduced by Della Science in the video?

• Air pollution

• Water pollution

• Soil erosion

• Recycling

What color is the piece of plastic used in the experiment?

• Blue

• Red

• Green

• Orange

Which of the following items was NOT added to the water as a pollutant?

• Coffee

• Paprika

• Sand

• Food coloring

What happens to Flash when pollutants are added to the water?

• He changes color

• He sinks to the bottom

• He disappears

• He swims faster

What is the first step in the water filtration method demonstrated?

• Using a strainer with big rocks

• Using a coffee filter

• Boiling the water

• Adding sand

Why is sand used in the filtration process?

• To add nutrients

• To remove large debris

• To make the water taste better

• To change the water color

What is placed over the fish bowl to help clean the water?

• A piece of cloth

• A metal lid

• A coffee filter

• A plastic sheet

Which sample was the clearest after the filtration process?

• All were equally clear

• Sample two

• Sample one

• Sample three

What lesson is emphasized at the end of the video?

• Water pollution is not harmful

• Fish can adapt to polluted water

• Pollution should be prevented

• Pollution is easy to clean

What is the main challenge highlighted in cleaning polluted water?

• It is quick and easy

• It is time-consuming and difficult

• It is unnecessary

• It requires no resources