1. What does corrosive mean? 2. How would you test a substance, to see if it is an acid? 3. Write down the formula for: sulfuric acid, nitric acid, calcium hydroxide, and ammonia solution 4. Phenolpthalein is an indicator. What does that mean? 5. What does this pH value tell you about the solution? a …
I have been using technology in my teaching for many years now. I began by using laptops, projectors, cpu’s and tablets in my classroom to facilitate learning. This allowed my students to access online resources such as videos, audio, and other electronic media. I also found that the use of technology in the classroom allowed …
I was struggling to decide whether I should use gardening or agriculture for the title. I came up with the word “farming”, it looks suitable for me which I will share. During the lockdowns and situation of job loss, a large number of people moved to learn gardening. They created a beautiful small garden in …
Metals are not available naturally in the form that we use. They are extracted from their ores. Metals and their ores are shown in the table below: S.No Metal Ores 1 Sodium(Na) Chile saltpetreTronaBoraxCommon salt 2 Aluminium(Al) BauxiteCorundumFeldsparCryoliteAluniteKaolin 3 Potassium(K) Nitrate(saltpetre)Carnalite 4 Magnesium(Mg) MagnesiteDolomiteEpsom saltKieseriteCarnalite 5 Calcium(Ca) DolomiteCalciteGypsumFluorsparAsbestos 6 Strontium(Sr) StrontianiteSilestone 7 Copper(Cu) CupriteCopper glanceCopper …
1. Calcium Carbonate Formula: CaCO3 Uses: Non-prescription drug for relief from acid indigestion and heartburn. It is also considered as a calcium supplement. 2. Sodium Chloride Formula: NaCl Uses: Used to season food (during food preparation and at the table), also used in the past as a method of food preservation. 3. Methane Formula: CH4 Uses: natural gas, fuel (also called …
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Which of the following is an element? (A) Diamond (B) Emerald (C) Sapphire (D) Ruby Answer: A (Graphite and Diamond are allotropes of Carbon) The catalyst used in the production of ammonia by the Haber’s process is (A) Platinum (B) Molybdenum (C) Iron (D) Nickel Answer: B Which of the following is to be found …
Terms: Ampere – The ampere is the standard unit of measure of electric current. It is sometimes written as amp. Alternating current (AC) – An electric current that reverses direction on a periodic basis. It is widely used to transport power on power lines. Direct current (DC) – A type of current that only flows …
Teaching geometry and trigonometry were not easy for me without the mathematical tools. The students from grade 8 we’re not able to understand how to make different geometrical shapes with the mathematical tools. So teachers should have the tools that the students are using in order to show how the drawings can be done. I …