Capillary Action and Color Mixing

Sana introduces capillary action, explaining it as the movement of water through paper towels, similar to how trees absorb water. She demonstrates an experiment using colored water, cups, and paper towels to show how colors mix through capillary action. A second experiment involves toothpicks and water, illustrating how wood expands when wet. The video provides a hands-on approach to understanding these scientific concepts.

What is the main concept being introduced in the video?

• Gravity

• Photosynthesis

• Evaporation

• Capillary Action

Which of the following is NOT a material needed for the capillary action experiment?

• Food color

• Cups

• Paper towels

• Sand

How should the cups be arranged for the experiment?

• In a circle

• In a zigzag pattern

• Randomly

• In a straight line

What is the purpose of using paper towels in the experiment?

• To clean up spills

• To act as a bridge for water

• To add color

• To weigh down the cups

What is cohesion in the context of capillary action?

• Molecules attracting each other

• Molecules repelling each other

• Molecules attracting different molecules

• Molecules evaporating

What new colors were observed after the experiment?

• Purple and pink

• Orange and green

• Brown and black

• Yellow and red

How do the paper towels contribute to the formation of new colors?

• By blocking the water flow

• By absorbing all the water

• By acting as a bridge for color mixing

• By changing the color of the water

What is the main material used in the new experiment with toothpicks?

• Toothpicks

• Metal rods

• Rubber bands

• Plastic straws

What happens to the toothpicks when water is added?

• They change color

• They expand

• They shrink

• They dissolve

What is demonstrated by the expansion of toothpicks in water?

• Reflection

• Evaporation

• Condensation

• Absorption