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| Questão | Responda |
| Where do fossil fuels come from? | Formed from the remains of plants and the remains of sea animals and plants that lived hundreds of millions years ago |
| What are fossil fuels? | Coal, Petroleum and natural gas |
| What do fossil fuels contain? | Hydrocarbons |
| What are the major compositions of coal? | It consists of 65% - 95% carbon. |
| What are the major compositions of petroleum? | It consists mainly of hydrocarbons. |
| What are the major compositions of natural gas? | Mathane (CH4) |
| How did the coal form? | Coal formed from the remains of plants. |
| How did natural gas and petroleum form? | They formed from the remains of sea animals. |
| How can different fractions in petroleum be separated industrially? | fractional distillation |
| Name 4 petroleum fractions and what are the major uses of these fractions? | Petrol (fuel for motor cars) Naphtha (raw materials for production of town gas) Diesel oil (fuel for heavy vehicles) Bitumen (material for covering) |
| What is combustion? | Combustion, a chemical reaction between substances, including oxygen and usually accompanied by the generation of heat and light in the form of flame. |
| What are the products of combustion of fossil fuels? | Carbondioxid and Water |
| What are the major sources of air pollutants and where do they come from? | (CO,CO2) Exhaust of motor cehicles (CO2,SO2, NO2)Power plants (SO2, NO2)Factories (SO2, NO2)Incinerators |
| What is acid Rain? | Rainwater with a pH value lower than 5.6. Cause from H2CO3, H2SO4 and HNO3 |
| What are the harmful effects of acid rain? | Damaging plants Killing aquatic life Corroding building materials Corroding metal objects |
| What is global warming? | Greenhouse effect (Ch. 20 page 22-23) |
| What are the harmful effects of global warming? | Melting effects Climate change Putting the wildlife in danger |
| What are the harmful effects of oil spillage? | Water pollution blocks the oxygen supply to aquatic life poisonous to aquatic life |
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