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Bricks
- 1. Priya G.Nath
- 2. Priya G.Nath
- 3. Main Objectives – - Make mathematics as a part of children’s life experiences. - Shifting the focus from content to learning environments. - Offer connection within mathematics or across subject areas to application in sciences. - Enjoy and appreciate the value of mathematics. Specific Objectives- Priya G.Nath To familiarize with a brick. To understand a brick’s shape. To build patterns through bricks. To Test the strength of different arrangements of bricks. To perform simple mathematical operations related with bricks such as find its weight, find the total number of bricks needed to build a wall, etc.
- 6. n’t it r! Is Mina utub tiful? e up Its Q Beau d y ma icall it bas ? at is of Wh Bricks Bricks Bricks Priya G.Nath Bricks
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- 8. corner edge face •A brick is in the shape of a •Itcuboid. has 6 faces/surfaces. •It has 12 edges. Priya G.Nath •It has 8 corners.
- 9. height breadth length A cuboid has 3 dimensions- Length, Breadth and Heigh Priya G.Nath
- 10. Objects having cuboidal shapes Ah! I have seen these shapes all around me. So they are cuboidal in shape! Priya G.Nath
- 11. A brick from different views B B Priya G.Nath TOP FRONT SIDE
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- 14. Wow!! Next time I am going to observe more carefully the patterns around me. Priya G.Nath
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- 16. A brick kiln This is where bricks are made Priya G.Nath
- 17. Bricks are made from clay soil dug from the ground. Stones are sieved from the clay. Clay is pressed into rectangular moulds. Bricks are left to dry. Then they are stacked over channels of burning charcoal and baked at high temperature in a kiln. Priya G.Nath
- 18. A common sight near a brick kiln Priya G.Nath
- 19. Brick feels 1.hard - moulded clay is baked at a very high temperature to form bricks 2. roughish and looks dull 3. dry 4. easy to handle - bricks are all the same regular shape and size making them easy to carry and build we must remember Brick takes these facts ,to make a weight - they make a strong structure when bonded together we good houses when grow up. Brick resists 1. cold - brick keeps in heat (insulates) 2.electricity - they will not carry an electrical charge 3. weather - bricks are hard-wearing and reasonably weatherproof 4. fire - they will blacken but not burn. Priya G.Nath Brick changes 1. if frozen - bricks are not waterproof and will slowly absorb water - if the water freezes and therefore expands then the ice will lead to the bricks flaking and breaking up 2. if knocked - bricks are brittle and will shatter - some bricks are stronger than others depending on the sort of clay used
- 20. Lets find out which arrangement of bricks is the strongest! Testing brick bonds • The strengths of different types of bonds (patterns of building the bricks) can be tested as shown below. • 1. You need some rectangular blocks, a length of guttering propped up at one end, and a big marble. • 2.Build the blocks in a regular pattern a short distance away from the guttering. • 3. Place (not push) the marble on the top of the guttering to roll towards the blocks. • 4. Count how many move or fall down. • 5. Build the bricks again in a different way (another bond) in the same spot and try again. Find the strongest way to build the bricks. Falls easily Priya G.Nath
- 21. Doesn’t fall easily!! So this arrangement of bricks has more strength! Priya G.Nath
- 22. Lets expLore How many bricks are needed for the front side of the wall? 6x7=42 bricks Priya G.Nath If the breadth of the room requires 3 bricks ,can you guess the number of the bricks approximately needed for that wall? Now you can find the total number of bricks (approx) needed for the four walls too! To check your answer, click here
- 23. Number of bricks needed is 3 So 7 layers of 3 bricks is 7 times 3 = 21 bricks No. of bricks needed for 4 walls: 42 + 21 + 42 + 21= 126 bricks 7x3=21 6x7=42 bricks This is interesting! 6x7=42 bricks 7x3=21 Priya G.Nath
- 24. Answer these 1. If one brick weighs 6 kg, what will be the weight of 5 such bricks? 2. If 400 bricks costs Rs.8000,find the cost of 200 bricks. Priya G.Nath Check your answer here Check your answer here
- 25. 6 kg 6 kg 6 kg 6 kg 6 kg 6 kg 1 brick = 6 kg So, 5 bricks = (6+6+6+6+6)kg = 5 x 6kg = 30 kg The cost of 400 bricks = Rs.8000 As 200 bricks is half of 400 bricks, the cost will also be half. So, the cost of 200 bricks is Rs.8000 ÷ 2 = Rs.4000 Priya G.Nath Rs.4000 Rs.4000
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- 29. Basic shape of a brick Brick patterns This is what we learnt! Making of bricks Priya G.Nath Bricks & mathematics
- 30. Now Assignments Time 1. Weigh and measure a regular brick and note your recordings in your notebook. 2. Draw different patterns with bricks. 3.Stick Pictures of brick designs. 4. If the cost of one brick is 7 rupees, find the cost of 70 bricks. Priya G.Nath
- 31. Match the solids with its top surface. Priya G.Nath
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- 33. Aknowledgement The NCERT TEXTBOOK –Math-Magic Book-4 http://office.microsoft.com/en-us/clipart/defa www.google.com NCF-2005 National Focus Group on Teaching of Mathematics. Priya G.Nath