Cloud Formation and Sultana Experiment

The video tutorial demonstrates an experiment to create a cloud in a fizzy drink using sultanas and salt. It explains how bubbles form around sultanas and how adding salt increases nucleation sites, creating more bubbles. The experiment is linked to atmospheric science, illustrating how clouds form and grow with condensation nuclei like dust and pollution. Instructions for the experiment are available on the Royal Meteorological Society's website.

What materials are needed for the cloud in a fizzy drink experiment?

• Still water, a clean large glass, sultanas, sugar, and a large washing up bowl

• Sparkling water, a clean large glass, sultanas, salt, and a large washing up bowl

• Still water, a small glass, raisins, sugar, and a small bowl

• Sparkling water, a small glass, raisins, salt, and a large washing up bowl

What happens when a sultana is placed in sparkling water?

• It floats to the top and stays there

• It sinks to the bottom and stays there

• It sinks to the bottom and rises back up as bubbles form around it

• It dissolves completely in the water

What role do imperfections on the sultana play in the experiment?

• They make the sultana float permanently

• They cause the sultana to dissolve

• They allow bubbles to form around the sultana

• They prevent bubbles from forming

What is the effect of adding salt to the sparkling water?

• It decreases the number of bubbles

• It increases the number of nucleation sites, forming more bubbles

• It causes the water to freeze

• It makes the water less fizzy

How does the experiment relate to atmospheric cloud formation?

• Clouds form only in the presence of salt

• Clouds form only when there is no pollution

• Clouds form where the temperature is high enough for water to evaporate

• Clouds form where the temperature is low enough for water to condense, with particles acting as nucleation sites

What is required for clouds to grow in the atmosphere?

• Evaporation and condensation must occur at the same rate

• Evaporation must occur at a rate faster than condensation

• Condensation must occur at a rate faster than evaporation

• Condensation must occur at a rate slower than evaporation

What are common particles that act as cloud condensation nuclei?

• Water droplets and ice

• Dust, soot, and pollution

• Salt and sugar

• Large rocks and stones

What happens to pollutants in the atmosphere during cloud formation?

• They are dissolved in the air

• They are incorporated into clouds and washed out by rain

• They remain suspended in the air indefinitely

• They evaporate into the atmosphere

What is the approximate size of particles that act as cloud condensation nuclei?

• 1 millimeter in diameter

• 1 nanometer in diameter

• 1 centimeter in diameter

• 1 meter in diameter

Where can you find the instructions for the cloud experiment?

• On the Royal Meteorological Society's website

• In a science textbook

• At a local library

• In a weather app