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→Useful websites
==Useful websites==
==Useful websites==
One study suggests that recent spikes in childhood allergies can be due to the number of antibacterial home products and cleaning chemicals we use. Learn more about the results of this study and the role beneficial bacteria in the digestive tract play.<br>
1.One study suggests that recent spikes in childhood allergies can be due to the number of antibacterial home products and cleaning chemicals we use. Learn more about the results of this study and the role beneficial bacteria in the digestive tract play.<br>
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2. A review worksheet on harmful/helpful micro-organisms and biodegradable/non-biodegradable items by BBC-Teachers [http://downloads.bbc.co.uk/schools/teachers/ks2worksheets/bbc_teachers_ks2_science_worksheet_microorganisms.pdf 'Microorganisms']
==Reference Books==
==Reference Books==