You are in the category: Physical Science

How to simulate a volcanic eruption with an acid and a base

Safely creating an erupting 'volcano' When a liquid acid is mixed with a solid carbonate base such as powdered bicarbonate of soda, carbon dioxide gas is produced. The resulting mix is a gas plus a liquid instead of a liquid plus a solid, which takes up more space. If a flask is used to simulate... More

How to make hydrogen gas from magnesium and hydrochloric acid

Safety First Hydrogen gas is explosive so it should only be made in a laboratory with a qualified Science teacher or responsible adult present. Safety goggles should always be worn when using an acid and making a gas. Read and follow the directions carefully. Hydrogen gas is lighter than air so... More

How to use the surface tension of water to power a paper boat

Surface tension is the force that holds water together Water molecules are more attracted to each other than to air. This creates the phenomenon we call surface tension. The water molecules on the surface are more attracted to the other molecules on either side of them than to the air molecules.... More

How to light a Bunsen burner

Safety first Before anyone lights a Bunsen burner, several steps need to be carried out. Are all gas taps off? Are all bunsen burners working properly? (For instance, sometimes the air vents are jammed) Are all plastic connector hoses in good condition with no holes? Make sure the students are... More