Diffusion in Agar Cubes Lab

The video tutorial guides students through an ideal cell size lab using agar cubes and vinegar. It begins with an introduction to the experiment, followed by pre-lab instructions. The procedure involves placing agar cubes of different sizes in vinegar to observe diffusion. Observations and measurements are made to analyze how far the vinegar diffuses into the cubes. The video concludes with an analysis of the results, focusing on the implications for cell size and nutrient diffusion.

What is the purpose of using vinegar in the ideal cell size lab?

• To act as a nutrient source for the agar cubes

• To provide a source of oxygen for the experiment

• To simulate the diffusion process in cells

• To change the color of the agar cubes

What is the role of phenolphthalein in the agar cubes?

• To make the cubes more solid

• To act as a nutrient for the cubes

• To indicate the presence of an acid

• To increase the diffusion rate

Before starting the lab procedure, what should students do?

• Watch the entire video

• Complete the pre-lab questions

• Prepare a report

• Mix the agar cubes with vinegar

What is the first step in the lab procedure after completing the pre-lab questions?

• Measure the diffusion rate

• Place the agar cubes in the beaker

• Cut the agar cubes in half

• Draw a diagram of the cubes

How long is the diffusion process observed in the lab?

• 10 minutes

• 30 minutes

• 15 minutes

• 20 minutes

What is the total diffusion distance for the 1 cm cube?

• 0.8 cm

• 0.6 cm

• 0.4 cm

• 0.2 cm

For the 2 cm cube, how much of the cube was diffused?

• 0.4 cm

• 0.8 cm

• 0.6 cm

• 0.2 cm

What is the significance of measuring both sides of the agar cubes?

• To calculate the total diffusion distance

• To verify the vinegar concentration

• To ensure accuracy in the cube size

• To determine the color change

Which cube size had the least amount of diffusion relative to its size?

• 1 cm cube

• All had the same diffusion

• 2 cm cube

• 3 cm cube

What should students consider when analyzing which cell size is more efficient?

• The color of the agar cubes

• The time taken for diffusion

• The amount of nutrients diffused

• The total volume of the cubes