Water Addition Techniques in Experiments

In this high school teacher demonstration video, the instructor shows how to add fresh warm water and warm salty water to a container using pipettes. The fresh warm water is dyed red, and the warm salty water is dyed green. The video emphasizes the technique of using a pipette by placing its tip at the edge of the glass to add the liquids carefully.

What is the initial temperature of the water used in the experiment?

• 25.0 degrees Celsius

• 20.0 degrees Celsius

• 30.0 degrees Celsius

• 26.3 degrees Celsius

What color is the fresh warm water added to the container?

• Blue

• Green

• Red

• Yellow

What tool is used to add the fresh warm water to the container?

• Dropper

• Syringe

• Measuring Cup

• Pipette

What is the color of the warm salty water added to the container?

• Yellow

• Green

• Blue

• Red

Where is the pipette tip placed when adding liquids to the container?

• In the center of the glass

• At the bottom of the glass

• At the edge of the glass

• Above the glass