Science

In science will be covering:

• Changes of Materials - 'Chemistry Kitchen'

Within the topic 'Changes of Materials' we learn:

• A reversible change is a change that can be undone or reversed.
• An irreversible change is when a chemical reaction results in the formation of new materials and cannot be changed back. 
• Reversible changes are physical changes.
• Irreversible changes are chemical changes.
• Heat often causes chemical changes to occur and these are irreversible and that burning is an example of an irreversable change that forms a new material.
• Many irreversible changes form gases, including carbon dioxide, when they take place.
• Rust is a new material that is formed by a chemical reaction of iron and oxygen when water is present.
• Mixing milk and vinegar forms a type of plastic that was used to make products in the past.
• Scientists use chemical reactions to invent new materials, including ones that use recycled materials.  
• About the inventions of Spencer SIlver and Stephanie Kwolek.