Summary
Earth and Atmospheric Science covers the formation and use of crude oil, the impact of fuels on the environment, and the evolution of Earth's atmosphere.
- Crude Oil — a complex mixture of hydrocarbons found in porous rocks. Example: Used to produce fuels like gasoline and diesel.
- Fractional Distillation — a process to separate crude oil into useful fractions based on boiling points. Example: Separates petroleum into gasoline, diesel, and other products.
- Homologous Series — a family of compounds with similar properties due to the same functional group. Example: Alkanes and alkenes.
- Complete Combustion — burning of hydrocarbons with sufficient oxygen producing carbon dioxide and water. Example: C3H8 + 5O2 → 3CO2 + 4H2O.
- Incomplete Combustion — burning with insufficient oxygen producing carbon monoxide and soot. Example: 2CH4 + 3O2 → 2CO + 4H2O.
- Acid Rain — rain that contains dissolved sulfur dioxide and nitrogen oxides. Example: Damages buildings and aquatic life.
- Greenhouse Gases — gases that trap heat in the atmosphere, contributing to the greenhouse effect. Example: Carbon dioxide, methane, and water vapour.
- Climate Change — long-term changes in temperature and weather patterns, often linked to human activity. Example: Global warming due to increased CO2 emissions.
Exam Tips
Key Definitions to Remember
- Crude oil is a mixture of hydrocarbons.
- Fractional distillation separates crude oil into fractions.
- Complete combustion produces carbon dioxide and water.
- Incomplete combustion produces carbon monoxide and soot.
Common Confusions
- Difference between complete and incomplete combustion.
- Confusing the greenhouse effect with the enhanced greenhouse effect.
Typical Exam Questions
- The process of separating the different length hydrocarbons from crude oil is known as what? Fractional Distillation
- What are the two products of complete combustion? Water and carbon dioxide
- The Early atmosphere of Earth was similar to that of which planets today? Mars and Venus
- Which of the following are greenhouse gases? Water vapour, carbon dioxide, and methane
What Examiners Usually Test
- Understanding of fractional distillation and its uses.
- Differences between complete and incomplete combustion.
- Effects of greenhouse gases on climate change.
- Evolution of Earth's atmosphere and its composition changes over time.