Science/chemistry. Yr8 Flashcards
Define the word fuel
Fuel is a chemical substance from which stored energy can be transferred usefully to make things happen.
Fuel types
Coal-solid
Hydrogen-gas
Oil-liquid
What is the word equation for a hydrogen fuel cell
Hydrogen+oxygen= water
H + O2 = H2O
Reactants Products
Hydrogen fuel releases energy that is transferred to electricity to make the bus move.
What is the product and reaction in a hydrogen fuel cell?
Water/H2O
How is acid rain formed
Acid rain is formed by pollution from burning fuel like petal and diesel which cause nitrogen oxide and surfer oxide
What happens when there is acid rain
Plants become unhealthy, fish die because acidic lakes, it breaks down rocks and removes the salts from the soil
What does combustion mean
Burning
What does Oxidation mean
When metal mixes with oxygen
What is the fire triangle made of.
Oxygen, fuel and heat
What does flammable mean
Easily burst into flames
What does explosive mean
Contains enough energy to explode
What does oxidising mean
Releases oxygen
What does soot mean
Partials made up of carbon that has not reacted with oxygen
What does carbon monoxide mean
A gas from carbon that reacts partly with oxygen
What is a greenhouse gas
gasses that are in the earths atmosphere such as carbon dioxide, water vapour or methane
What does the greenhouse effect mean
The warming effects on the earths surface
Coal is a what? Fossil fuel
Hydrocarbon
Hindenburg air ship - what caused it to explode.
Because when hydrogen reacts with electricity it is very explosive