Limestone, oil, fractional distillation
Limestone is a rock made up of mainly calcium carbonate. It’s cheap and easy to obtain. Some uses:
1) Building materials – limestone can be quarried and cut into blocks to be used in _. However, it is badly affected by .
2) Glass making – glass is made by mixing limestone with _ and soda:
3) Cement making – limestone can be “roasted” in a rotary kiln to produce dry cement. It’s then mixed with sand and gravel to make _.
Words – sand, building, sedimentary, concrete, acid rain
Words – slaked, acidic, neutralise, decomposition, carbon dioxide
1) Layers of dead sea _ settle on the seabed.
2) Layers of rock build up on top.
3) The heat and from these rocks, along with the absence of , mean that oil and gas are formed over of years.
Words – sedimentary, millions, oxygen, creatures, pressure
Longer chains mean…
Less ability to flow
Higher boiling point
Crude oil is a mixture of HYDROCARBONS (compounds made up of carbon and hydrogen). Some examples:
Crude oil can be separated by fractional distillation. The oil is evaporated and the hydrocarbon chains of different lengths condense at different temperatures: