Aquatic Experiment with Snails and Plants

Miss Roberts conducts an experiment using bromothymol blue as an indicator to show the presence of carbon dioxide and oxygen. Two sets of test tubes are set up to mimic day and night conditions. Each test tube contains different contents: controls, an aquatic snail, an aquatic plant, or both. Students are tasked with answering questions about the color changes observed in the test tubes, which indicate the presence of carbon dioxide or oxygen. The experiment concludes with reassurance that the snails and plants are unharmed.

What is the role of Bromothymol Blue in the experiment?

• To act as a nutrient for the snails

• To indicate the presence of carbon dioxide and oxygen

• To provide light for the plants

• To serve as a habitat for aquatic life

How does Bromothymol Blue change color in the presence of carbon dioxide?

• It remains blue

• It turns red

• It turns yellowish green

• It becomes colorless

What was the purpose of having two sets of test tubes in the experiment?

• To measure the growth of snails and plants

• To compare the effects of different temperatures

• To test different concentrations of Bromothymol Blue

• To observe the effects of light and dark conditions

What was inside the control test tubes?

• Only water and Bromothymol Blue

• Water, Bromothymol Blue, and plants

• Water, Bromothymol Blue, snails, and plants

• Water, Bromothymol Blue, and snails

Which test tube contained both an aquatic snail and an aquatic plant?

• The second test tube

• The third test tube

• The first test tube

• The final test tube

Why were some test tubes kept in the dark?

• To prevent algae growth

• To simulate nighttime conditions

• To reduce evaporation

• To test the effect of temperature

What was the expected outcome for the test tube with both a snail and a plant?

• No color change

• Color change to red

• Color change to yellowish green

• Color change to blue

What reassurance was given about the snails and plants used in the experiment?

• They were disposed of safely

• They were kept in the test tubes

• They were not real

• They were returned to the aquarium

What was the main purpose of the experiment?

• To study the interaction between snails and plants

• To measure the growth rate of snails

• To observe color changes in Bromothymol Blue

• To test the effects of different temperatures

What should students do after watching the video?

• Write a report

• Answer the questions provided

• Create a presentation

• Conduct their own experiment