or Automatic Level Let us look at the history of surveying levels. Since the Dumpy level was invented in early 1700’s it has been considered the standard‚ that was up until around the 1830’s when the transit level was invented. Recently the level has changed faster than you can keep up with it‚ but through all this the Dumpy level has remained a reliable back up just in case the modern levels breakdown. A dumpy level‚ builder’s auto level‚ leveling instrument or automatic level is an optical
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NSS Chemistry Part 15 Analytical Chemistry (Structural Questions) HKCEE and HKAL Past Paper Questions 1. HKCEE 1994 Q8b A student carried out some tests on an ionic compound X which was a white solid. The results obtained were summarized in the following flow diagram: (i) Based on the above information‚ deduce the cation and anion present in X. (ii) Describe how the flame test on X can be carried out in the laboratory. (6 marks) 1 2. HKCEE 1995 Q2 In each of the following
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Weigh a mealworm and record its mass (0.61g). b) Set-up: Put 5 NaOH pellets into an Eppendorf tube. Place in inverted into a testtube. Place a layer of netting over it. Put the mealworm into the test tube. Put into water bath. Make sure that water level is higher than worms can reach. Set up respirometer and connect to test tube when temp. stabilises. c) Record original volume reading of water in syringe‚ then every minute‚ record‚ the rate of decrement. d) Calculate rate of O2 consumption Additional
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Marine biology I would be an extremely happy man if I could do what I love for the rest of my life.With the many issues going on in our waters such as overfishing‚ pollution‚ and global warming. Marine biologists work hard day in and out to put an end to these terrible things that occur more often that one thinks. Did u know Water covers the 71 percent of the earth. As a kid must of my summers were spent at my family’s lake house and I loved every minute of it. I saw a lot of terrible things
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Biology What is cholesterol? Cholesterol‚ a waxy substance produced by the liver and found in certain foods‚ is needed to make vitamin D and some hormones‚ build cell walls‚ and create bile salts that help you digest fat. our liver produces about 1‚000 milligrams of cholesterol a day‚ enough cholesterol for the body to be ok without food with colesterol but it’s hard to avoid cholesterol entirely because so many foods contain it. Consequences o high cholesterol. Too much cholesterol in the
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Education *6746873383* INFORMATION AND COMMUNICATION TECHNOLOGY Paper 1 0417/11 October/November 2010 2 hours Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. No marks will be
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Topic: Do memories hinder or help people in their efforts to learn from the past and succeed in the future? No matter how much we want to forget‚ we still remember what and how we did it. Sometimes‚ we regret the things that hurt other people especially our loved ones‚ friends and even our teachers. We always think that sharing the worst memories is as hard as a rock but after sharing them‚ we feel a difference in both our minds and body. Memories were our completion to who we are and what
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Biology is a wonderful subject that many students enjoy. But as life would have it (no pun intended)‚ this study is not a favorite of the majority of students who pass through the halls of school. Here are a few questions about biology and some answers to them. So why do we study biology? A lot of students trying to get through school stare at the mountain of work this class involves and struggle through. Some rationalize that it’s good to be well rounded in science or just school in general
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has a specific history‚ and started in a time where being “colored skin” is considered abnormal. While being white was the norm‚ at that time biology was important and science was influencing the population. Indeed‚ there were‚ are and will be physical differences between people. Yet‚ what is significant about these when it comes to race is not the biology of those differences‚ but the social weight we attach to them. Therefore‚ the race still exists not because it is biological or normal‚ but because
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Bibliography: Johnson‚ J. J. (n.d.). Lab Report . Retrieved 3 1‚ 2014‚ from IB Biology Higher Level: http://www.edu.pe.ca/gray/class_pages/smaccormack/leaf_disc_photosynthesis_write_up.pdf Photosynthesis. (n.d.). Retrieved 3 1‚ 2014‚ from IB Guide: http://ibguides.com/biology/notes/photosynthesis-hl
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