earth

• How can we extract iron from its ore of

  iron oxide?

  Iron is less reactive than carbon, so you

  can use a displacement reaction to

  extract the iron.
• When would we use

  electrolysis to extract a

  metal from its ore?

  When the metal is more

  reactive than carbon so

  cannot be extracted using a

  displacement reaction
• What do we call the mixture of

  gases around the Earth?

  atmosphere
• What are some impacts of global

  warming and climate change?

  • Polar ice sheets melting

  • Some areas having less water

  • Longer growing seasons

  • Severe weather events
• Which process removes carbon

  dioxide from the atmosphere?

  photosynthesis
• Which processes add carbon

  dioxide to the atmosphere?

  respiration and combustion
• What are some advantages of recycling?

  Reduced demand for fossil

  fuels

  • Causes less

  pollution/greenhouse gases

  • Less waste to landfill
• What are some and disadvantages of recycling?

  Initially high costs

  • Separation is difficult and

  recycled products are not high

  quality

  • Some (but less) greenhouse

  gases still released
• What does sustainability mean?


  Using a resource in such a way that it will be available to future

  generations
• what does green house effect mean?

  The warming of the Earth caused by trapped

  radiation from the sun
• what does deforestation mean?


  Cutting down of trees
• what does global warming mean

  Increase in Earth’s temperature due to

  increasing amounts of greenhouse gases in the

  atmosphere
• what does renewable mean

  Resources that will not run out
• What are the two products of complete combustion?

  carbon dioxide and water
• Describe global warming:


  Radiation from the Sun passes

  through the atmosphere to the Earth

  Radiation from the Earth is absorbed

  by greenhouse gases instead of

  escaping into space

  This increases the average

  temperature of the atmosphere.
• List some ways that humans are damaging the planet:

  • Deforestation

  • Mining

  • Over-fishing

  • Intensive farming