Aquatic Plant Lab Quiz

What is the purpose of adding bromthymol blue to the distilled water in the experiment?

• To act as a nutrient for the plant

• To serve as a pH indicator

• To change the water's temperature

• To sterilize the water

Why is it important to wear safety glasses while blowing into the bromthymol blue solution?

• To keep the solution warm

• To enhance the color change

• To improve visibility of the color change

• To prevent the solution from splashing into your eyes

What is the role of the foil in the experiment setup?

• To prevent light from reaching the test tube

• To label the test tubes

• To keep the test tube warm

• To allow air exchange

Which test tube is expected to change back to blue after being placed in sunlight?

• Test tube number one

• Test tube number two

• Test tube number four

• Test tube number three

What is the significance of the test tubes that remain light green?

• They serve as a control group

• They indicate a successful experiment

• They show the presence of oxygen

• They demonstrate plant growth