|How do we make smaller, more useful hydrocarbon molecules from big hydrocarbon molecules?
|Mix them with steam and heating them to a high temperature or passing the vapours over a hot catalyst
|What does cracking hydrocarbons produce?
|Saturated hydrocarbons that are used as fuel and unsaturated hydrocarbons
|What is an unsaturated hydrocarbon?
|An alkene, alkenes react with orange bromine water, turning it colourless. Alkenes are double bonded
|What are plastics made out of?
|What are polymers?
|Large molecules created when monomers join together. This is called polymerisation
|What are smart polymers?
|Polymers that may have their properties changed by temperature, light or other changes in their surroundings
|What are hydrogels?
|Polymers that can trap water, they are used for contact lenses
|What are plastic bottles made out of?
|What does biodegradable mean?
|When something can be decomposed by the actions of microorganisms in soil
|What can we make biodegradable plastics from?
|Plant material such as cornstarch
|What are the two methods used to create ethanol?
|fermentation and hydration
|What is fermentation?
|Enzymes in yeast breakdown the sugar into ethanol and carbon dioxide gas
|What is hydration?
|When ethene gas is reacted with steam in the presence of a catalyst to produce ethanol