{"id":975,"date":"2007-04-01T08:52:30","date_gmt":"2007-04-01T11:52:30","guid":{"rendered":"http:\/\/www.provoprimaryblog.com\/?p=975"},"modified":"2007-04-01T08:52:30","modified_gmt":"2007-04-01T11:52:30","slug":"friendly-bacteria","status":"publish","type":"post","link":"http:\/\/provolearning.com\/blog\/year-6\/friendly-bacteria\/","title":{"rendered":"Friendly Bacteria"},"content":{"rendered":"

Micro-organisms are small (very small) living organisms that like the same things as we do: oxygen, moisture, food and an even temperature. Micro-organisms exist everywhere: some are harmful and even dangerous, some cause no problems and even help us (for instance in our digestive tracts).
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\nWe were looking at ‘friendly’ bacteria <\/em>like yogurt and yeast. We investigated the effect of yeast when making bread. We made 6 different sets of bread rolls – ranging from having no yeast to too much yeast – and observed the effect. As you can see, the amount of yeast made a significant difference.<\/p>\n

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To make our investigation<\/em> scientific, we kept the test fair<\/em> by keeping everything else the same (same amount of every other ingredient, same method and same cooking time) and checked our results<\/em> by repeating the test to make 6 bread rolls with each mixture. We then noted our observations in a table and discussed what we had learned about yeast from our investigation. Click the link to see a sample table.<\/p>\n

results.pdf<\/a><\/p>\n

This Science topic is ‘Micro-organisms’. We began by looking at viruses<\/strong> <\/em>(extremely small organisms that cause diseases like measles, colds and ‘flu), fungi<\/strong><\/em> (moulds that cause diseases like athlete’s foot) and bacteria <\/strong><\/em>(microscopic organisms that cause infections and some diseases). We also thought about how to avoid or prevent the effects of harmful micro-organisms as well as the positive effects of other micro-organisms. For instance, we understand that although antibiotics can cure infections, they can also kill antibodies and friendly bacteria in our bodies.<\/p>\n

We focused on yeast as it is a familiar and friendly micro-organism that reacts visibly when given the basic requirements – oxygen, warmth, water and food. <\/em><\/strong>To prove yeast is a living micro-organism, we put some dried yeast in a test tube and added some warm water and sugar, then observed what happened. Within 2 minutes, there were so many bubbles, the test tube was overflowing. To be sure that something was being produced, we repeated the experiment, but put a balloon over the end of the test tube. The balloon inflated, showing that a gas was present. We know this gas was carbon dioxide <\/strong>which is produced by living things during respiration.<\/strong><\/p>\n

\"img_2271.jpg\" \"img_2272.jpg\"<\/p>\n","protected":false},"excerpt":{"rendered":"

Micro-organisms are small (very small) living organisms that like the same things as we do: oxygen, moisture, food and an even temperature. Micro-organisms exist everywhere: some are harmful and even dangerous, some cause no problems and even help us (for instance in our digestive tracts). We were looking at ‘friendly’ bacteria like yogurt and yeast. […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts\/975"}],"collection":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/comments?post=975"}],"version-history":[{"count":0,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts\/975\/revisions"}],"wp:attachment":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/media?parent=975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/categories?post=975"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/tags?post=975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}