Easy
What do we need to put inside the bottle to help make the cloud? (Hint: It's wet!)
Water
Why is baking soda a good ingredient for cleaning teeth in DIY toothpaste?
It is soft enough to gently scrub away food bits and stains. Baking soda is a mild abrasive, meaning it has small particles that can gently scrub the tooth surface to remove plaque and stains without being too harsh.
What two things do we mix together to make the special "gas" that puts out the fire?
Baking soda and vinegar
When you quickly release the pressure on the bottle, why does the temperature inside the bottle change?
The air gets colder. Releasing pressure causes the air to expand, and expanding air cools down, which is essential for cloud formation.
What happens when you let go of the bottle (release the pressure)?
A cloud appears
What important gas from the air does fire need to keep burning, that our experiment takes away?
Oxygen. Fire needs oxygen to combust; removing oxygen is a key principle in extinguishing fires.
What does the special gas from our experiment do to the fire?
Takes away what the fire needs to burn
When a bath bomb fizzes in water, what two main ingredients are reacting together to make all those bubbles?
Baking soda and citric acid. Baking soda (sodium bicarbonate) and citric acid are the main dry ingredients that react when wet to produce carbon dioxide gas, causing the fizzing.
What is one common powdery ingredient we use to clean teeth in DIY toothpaste?
Baking soda
Why do we sometimes add a tiny bit of oil (like coconut oil) to our bath bomb mixture?
To help all the dry ingredients stick together like glue and make the bath bomb hold its shape. Oils act as a binder, helping the dry ingredients compress and hold the bath bomb's shape. They also add moisturizing properties to the bath.