science exam retrieval questions:

• energy from the sun evaporates water. warm water rises and cools and so it condenses. water falling from clouds is called precipitation. water taken up by plant roots and lost through their leaves is called transpiration.
• carbon dioxide is taken in by plants and used for photosynthesis. carbon is transferred from plants to animals by ingestion. carbon in plants and animals returns to the soil by decomposition. carbon in fossil fuels is released by combustion.
• what do we call it when pollutants run off water ways and cause an algal bloom?

  eutrophication
• what do we call it when a toxin builds up in a food chain?

  bioaccumulation
• what is created when sulphur and nitrogen oxides dissolve into rain?

  acid rain
• what do we call chopping down all of the trees in a forest?

  deforestation
• name the main greenhouse gas that is causing global warming.

  carbon dioxide
• give one consequence of global warming.

  ice caps melting
• give one way that we can maintain biodiversity. 


  protect habitats