Chemistry

Grade 6 Examination Portion coverage 3rd  Term exam 21-22 and Answer Key Grade 6 Social Studies Unit 3 Asia’s Governmental Systems Lesson 1 Governmental Systems Page 56 to60 Lesson 2 Absolute Monarchies Page 61 to 64 Lesson 4 Arab Republics Page 69 to 74 Page 60 Page 64 Page 72 Page 73 Page 74

  Examination Portion coverage 3 rd   Term exam 21-22 and Answer Key Grade 5 Science Chapter 5 Our Dynamic Earth Lesson 1 Earth’s Landforms Workbook Page 102 Lesson 2 Plate Tectonics Workbook Page 105 Lesson 3 Volcanoes Workbook Page 111 Lesson 4 Earthquakes Workbook Page 116, 125 and 126                                                                     Workbook 125 1.       B 2.       D 3.       B 4.       A 5.       C 6.       C 7.       A Workbook 126 8.       A 9.       C 10.    B 11.    A 12.    D 13. ...

  Calcium carbonate Have you ever seen the 'white cliffs of Dover? If you have, you've seen lots of calcium carbonate. Chalk is one form of limestone, made from around 98% calcium carbonate. You might also find other rocks containing calcium carbonate around your school Limestone itself is a common building material. It might be spread on the school roads or roofs as chippings. Chalk is one form of limestone, made from around 98% calcium carbonate. The chemical formula of calcium carbonate is CaCO 3 . Another source of calcium carbonate is marble. Another source of calcium carbonate is marble. The chemical formula of calcium carbonate is CaCO 3 . Many rocks with calcium carbonate in them were formed from the shells of sea creatures that died millions of years ago. The sediments built up on the seabed and slowly formed limestone. Marble is formed from limestone crushed by powerful movements in the Earth's crust and/or by very high temperat...

  Lesson 2: Absolute Monarchies Lesson Objectives: Students should be able to: 1) identify the two countries Saudi Arabia and Oman as absolute monarchies 2) identify some characteristics of the two countries and their leaders   1. Who rules the country if it were an absolute monarchy? (King or Queen) 2. Are all Arab countries absolute monarchies? (No, others are republics or constitutional monarchies) 3. Can you give two examples of Arab absolute monarchies? (Oman and Saudi Arabia)   Explain that the first map is the map of Oman. Its flag is shown next to the map (remind students that each country has its own flag to represent it). The capital city (the main city where the king or president of the country usually lives) of Oman is Muscat.   The second map on this page is the map of Saudi Arabia. Its flag is shown next to the map. The capital city of Saudi Arabia is Riyadh. Explain that these two countries are Arab countries, and they a...

What is Brine? How we get common salt present underground. Brine: Solution of NaCl is called Brine. Ø Common salt is obtained from the ground by pumping out in the form of Brine (salt solution). Ø Hot water is pumped down the outer pipe. It dissolves the salt. The salt solution is then forced up the smaller inner pipe by the pressure of water. Ø The brine gets stored in lakes until it is needed. It is then pumped straight to the chemical plant. Brine (salt solution) The second way that we can get salt from the ground is solution mining. This method relies on salt dissolving in water. Look at the diagram below: Brine chemical plant It dissolves the salt. The salt solution is then forced up the smaller, inner pipe by the pr essure of water. The salt solution is called brine. The brine gets stored in lakes until it is needed. It is then pumped straight to the chemical plant. The holes left under the ground must be filled. If not the land above con colla...