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8E Combustion
Key words
Term | Definition |
---|---|
Law of conservation of mass | Mass is not lost or gained during a chemical reaction |
Metal | Element that is shiny when polished, conducts heat and electricity, is malleable, flexible and has a high melting point |
Metal oxide | A metal combined with oxygen |
Non-metal | Element that is not shiny and does not conduct heat nor electricity well |
Oxidation | Reacting with oxygen |
Oxide | A compound of a metal or non-metal with oxygen |
Oxidiser | A substance that supplies oxygen for a reaction |
Phlogiston | A substance that scientists once thought existed used to explain burning |
Exothermic | A reaction that converts chemical energy to heat energy |
Fire triangle | A way of showing heat, fuel and oxygen are needed for fire |
Acid rain | Rain water of a pH less than 5.6 due to dissolved sulfur and nitrogen oxides |
Asthma | A condition in which the tiny tubes leading to the alveoli become narrow and start to fill with mucus |
Catalytic converter | A device fitted to the exhaust pipe of a vehicle to change harmful pollutant gases into less harmful ones |
Complete combustion | Full reaction with oxygen Carbon + oxygen --> carbon dioxide |
Incomplete combustion | Partial reaction with oxygen Carbon + oxygen --> carbon monoxide (plus carbon and carbon dioxide) |
Filter (chemistry) | Technique often using filter paper that removes solids from a fluid |
Filter (physics) | Material that certain colours of light through |
Pollutant | A substance that harms the environment or organisms that live there |
Soot | Form of carbon in fine particles when hydrocarbons undergo incomplete combustion |
Climate change | Changes that happen to long term weather patterns as a result of global warming |
Global warming | Increase in the warming of the Earth’s surface |
Greenhouse effect | Warming of the Earth’s surface due to greenhouse gases capturing and re-emiting energy back to Earth |
Greenhouse gas | Molecule that can absorb energy emitted by the Sun |