the Earth’s existence there Describe how the different and Mars (this activity does was intense volcanic activity temperatures are referred to as not reflect atmospheric that released gases that the Goldilocks Effect. density). formed the early atmosphere and water vapour that Students test the acidity condensed to form the caused by dissolved CO2 by oceans. At the start of this blowing into and ‘seawater’ period the Earth’s tap water with a few drops of atmosphere may have been UI to find out which can like the atmospheres of Mars absorb more CO2 without the and Venus today, consisting acidity changing. of mainly carbon dioxide with little or no oxygen gas. Volcanoes also produced nitrogen which gradually built up in the atmosphere and there may have been small proportions of methane and ammonia. When the oceans formed, carbon dioxide dissolved in the water and carbonates were precipitated producing sediments, reducing the amount of carbon dioxide in the atmosphere. 5.9.1.3 and plants produced the WS 1.2 1 Students can investigate Describe how algae and plants oxygen that is now in the oxygen production in plants have caused the atmosphere by
the Earth’s existence there was intense volcanic activity that released gases that formed the early atmosphere and water vapour that condensed to form the oceans. At the start of this period the Earth’s atmosphere may have been like the atmospheres of Mars and Venus today, consisting of mainly carbon dioxide with little or no oxygen gas. Volcanoes also produced nitrogen which gradually built up in the atmosphere and there may have been small proportions of methane and ammonia. When the oceans formed, carbon dioxide dissolved in the water and carbonates were precipitated producing sediments, reducing the amount of carbon dioxide in the atmosphere. Describe how the different temperatures are referred to as the Goldilocks Effect. and Mars (this activity does not reflect atmospheric density). Students test the acidity caused by dissolved CO2 by blowing into ‘seawater’ and tap water with a few drops of UI to find out which can absorb more CO2 without the acidity changing. 5.9.1.3 and plants produced the oxygen that is now in the atmosphere by WS 1.2 1 Describe how algae and plants have caused the Students can investigate oxygen production in plants
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