Cohesion - The Running Water Experiment

Dr. Chemist explains cohesion through a simple experiment using string and cups. The demonstration shows how water can travel along a string due to cohesion. An extended version of the experiment is attempted over a longer distance, demonstrating the challenges and partial success of transporting water using cohesion. The video concludes with insights into the experiment's results.

What is the main difference between adhesion and cohesion?

• Cohesion is the attraction between different substances, while adhesion is between similar substances.

• Adhesion and cohesion are the same.

• Adhesion is the attraction between different substances, while cohesion is between similar substances.

• Adhesion is the attraction between similar substances, while cohesion is between different substances.

Which of the following is NOT needed for the cohesion experiment?

• Safety goggles

• Food coloring

• Tape

• String

Why is it important to wet the string before starting the experiment?

• To make the string heavier

• To ensure the water can travel along the string

• To change the color of the string

• To prevent the string from breaking

What should you do to prevent water from spilling during the experiment?

• Use a larger cup

• Pour the water slowly

• Use a thicker string

• Pour the water quickly

What was the main challenge faced when scaling the experiment to a larger distance?

• The string was too short

• The water evaporated

• The cups were too small

• The water only traveled a short distance initially

How much of the water was successfully transferred in the scaled-up experiment?

• All of the water

• Half of the water

• A quarter of the water

• None of the water

What does the experiment demonstrate about the properties of water?

• Water can be transported over long distances using cohesion

• Water cannot be transported using string

• Water can only travel short distances

• Water is not cohesive