CLASS 8E SCIENCE

GOOD MORNING TO ALL OF YOU                                                                                                                                       LET'S BEGIN TODAY WITH A SHORT  RECAP https://www.youtube.com/watch?v=kYf_Sl8W3qY     , Today we are going to talk about  FOOD PRESERVATION We preserve food to:      decrease the wastage of food increase the shelf-life of perishable (that gets spoilt easily) food materials.  to make food available to people in distant and remote places. to ensure availability of out of season food materials. In our houses we have seen common methods of food ...

GOOD MORNING BOYS AND WELCOME TO ANOTHER INTERESTING DAY Yesterday we were introduced to some of the vectors(carriers of specific microorganisms) like the mosquito, fly and the rat. In the table that was given, we also saw how are various other diseases spread. We also know that prevention is better than cure. washing our hands clean covering our mouth while sneezing or coughing preventing water from lying stagnant preventing open drains and garbage dumps covering foodstuff keeping a distance from an infected person etc helps to stop the spread of a disease. Animals also suffer from diseases.  These infectious diseases are caused by bacteria and viruses.  If you have a pet, you must have noticed that if it is not keeping well : it stops eating it becomes inactive its eyes water and there is excessive secretion of saliva(spit)                                      ...

GOOD MORNING BOYS                                                            Comments

Google Assessment on Light:  https://forms.gle/YC2Shfbyymqw9Tj67 GOOD MORNING AND WELCOME  Today we begin this class with a video. This video talks about  FOOD POISONING  . I'm sure each one of you has had a bout of vomiting and diarrhoea  at some point in your life up till now. This video makes for an interesting watch. Check it out. Make notes. It will help you at some point in life. https://www.youtube.com/watch?v=6VOWOzM6fHs&t=334s I really hope that you liked the video. This video is self explanatory. You may want to play it again. POINTS TO REMEMBER/NOTE Bacteria and fungi multiply fast in warm and humid conditions Spoiled food can be identified by its unpleasant smell, changed colour and bad taste. The common bacteria that cause food poisoning are: Salmonella, Staphylococci and Aspergillus. Raw food should be washed thoroughly to remove dirt, pesticides and manure. Food should be cooked properly to kill the microor...

Welcome to todays class✌ Let's Dive In💦 Diseases which get transmitted from one person to another by direct or indirect contact are called communicable diseases or infectious diseases. The different ways/modes of transm ission of a disease include: DIRECT TRANSMISSION THROUGH D irect contact Droplet infection Infected needle/syringe •               skin to skin •         during coughing, sneezing, spitting •         by blood transfusion, bite •          mucosa to skin •         eg.  Leprosy, conjunctivitis •         eg.  tuberculosis, whopping cough •          eg. rabies - dog bite, Aids - blood                     ...