{"id":1161,"date":"2023-09-27T12:53:22","date_gmt":"2023-09-27T12:53:22","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=1161"},"modified":"2023-09-27T12:56:59","modified_gmt":"2023-09-27T12:56:59","slug":"week-5-jss-2-third-term-basic-science-lesson-notes","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/week-5-jss-2-third-term-basic-science-lesson-notes\/","title":{"rendered":"Week 5 – Jss 2 Third Term Basic Science Lesson Notes"},"content":{"rendered":"

WEEK 5: CHEMICALS
\n<\/strong><\/p>\n

\t\t\t\tDEFINITION OF A CHEMICAL:
\nA chemical is a distinct compound or substance especially which has been artificially prepared or purified.
\n A chemical is any basic substance that is used in or produced by a reaction involving changes to atoms or molecules.
\nCLASSES OF CHEMICALS.
\n<\/strong>Chemicals can be divided into two classes;<\/p>\n

    \n
  1. \n
    Chemicals based on use.\n<\/div>\n<\/li>\n
  2. \n
    Chemicals based on hazardous nature.\n<\/div>\n

    \u00a0<\/li>\n<\/ol>\n

    Chemicals based on use include the following;<\/p>\n

      \n
    1. \n
      Pharmaceuticals.\n<\/div>\n<\/li>\n
    2. \n
      Cosmetics.\n<\/div>\n<\/li>\n
    3. \n
      Nuclear.\n<\/div>\n<\/li>\n
    4. \n
      Agro chemicals.\n<\/div>\n<\/li>\n
    5. \n
      Industrial chemicals.\n<\/div>\n<\/li>\n
    6. \n
      Laboratory chemicals.\n<\/div>\n

      Chemicals based on hazardous nature<\/strong>;<\/p>\n

        \n
      1. \n
        Highly hazardous and toxic chemicals.\n<\/div>\n<\/li>\n
      2. \n
        Moderately hazardous and toxic chemicals.\n<\/div>\n<\/li>\n
      3. \n
        Non- hazardous and toxic chemicals.\n<\/div>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

        EXAMPLES OF HAZARDOUS AND TOXIC CHEMICALS<\/strong>:<\/p>\n

          \n
        1. \n
          Ammonia\n<\/div>\n<\/li>\n
        2. \n
          Bleach\n<\/div>\n<\/li>\n
        3. \n
          Over cleaner( sodium hydroxide)\n<\/div>\n<\/li>\n
        4. \n
          Toilet bowl cleaners (hydrochloric acid).\n<\/div>\n<\/li>\n
        5. \n
          Car wash and polish\n<\/div>\n<\/li>\n
        6. \n
          Lice shampoo\n<\/div>\n<\/li>\n
        7. \n
          Flea powders\n<\/div>\n<\/li>\n
        8. \n
          Pesticides\n<\/div>\n<\/li>\n
        9. \n
          Tar and bug remover\n<\/div>\n<\/li>\n
        10. \n
          Sodium or calcium hypocrite.\n<\/div>\n<\/li>\n
        11. \n
          Triclosan\n<\/div>\n<\/li>\n
        12. \n
          Formaldehyde\n<\/div>\n<\/li>\n
        13. \n
          Phenol\n<\/div>\n<\/li>\n
        14. \n
          Nitrobenzene\n<\/div>\n<\/li>\n
        15. \n
          Trichloroethane\n<\/div>\n<\/li>\n
        16. \n
          Perchloethylene\n<\/div>\n<\/li>\n
        17. \n
          Sulphric acid\n<\/div>\n<\/li>\n
        18. \n
          Cytotoxic agents\n<\/div>\n<\/li>\n<\/ol>\n
            \n
          • \n
            EVALUATION: <\/strong>define chemicals\n<\/div>\n<\/li>\n
          • \n
            Classify chemicals based on the following:\n<\/div>\n<\/li>\n
          • \n
            Use\n<\/div>\n

            \u00a0<\/li>\n

          • \n
            Hazardous nature\n<\/div>\n<\/li>\n<\/ul>\n

            ASSIGNMENT: <\/strong>Give why bottles should be labelled.<\/p>\n","protected":false},"excerpt":{"rendered":"

            WEEK 5: CHEMICALS DEFINITION OF A CHEMICAL: A chemical is a distinct compound or substance…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,115],"tags":[],"class_list":["post-1161","post","type-post","status-publish","format-standard","hentry","category-posts","category-third-term-jss2-basic-science"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/comments?post=1161"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1161\/revisions"}],"predecessor-version":[{"id":1162,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1161\/revisions\/1162"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=1161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=1161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=1161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}