OUR OWN HIGH SCHOOL‚ Al WARQA’A‚ DUBAI SUMMATIVE EXAMINATION-2‚ MARCH -2014 Name: ______________________________________ Grade: VII Sec: ____ M Marks: 90 Time: 2 1/2 hours Subject: SCIENCE Date: 09/04/2014 General Instructions: 1. This question paper has 4 pages. 2. All questions are compulsory. 3. Question numbers 1 to 10 are questions of one mark each. 4. Questions 11 to 16 are very short answer questions of two marks each. 5. Question numbers 17 to 24 are short answer questions of 3 marks each
Premium Mirror Carbon dioxide Oxide
Phuong Pham Prof. Johnson Lab 3 Gravimetric determination of Calcium as CaC2O4.H2O Feb‚ 27‚ 2014 I. Objective: The purpose of this lab is to determine how well gravimetric method measures the calcium level in a solution of known calcium concentration. II. Method: a) Overview: In this lab we will prepare 25 mL known concentration Calcium solutions. Then we will use Gravimetric method to determine the concentration of Calcium in each solution to figure out how well this method is. As we know
Premium Arithmetic mean Gravimetric analysis Variance
Osteoporosis Many people have known at least one person in their life who has suffered from the term “osteoporosis”. Osteoporosis is a commonly heard of bone disease that effects many. The word osteoporosis literally means “porous bone”. When looked at microscopically‚ bones will appear to have a honeycomb appearance under normal‚ healthy circumstances. When he or she has osteoporosis‚ the microscopic honeycomb shape will have larger spaces between and within its appearance. The bigger spaces within
Premium Bone Osteoporosis Vitamin D
you cannot change are gender‚ age‚ small frame‚ ethnicity‚ family history. The risk factors that you have the opportunity to change are hormones‚ anorexia nervosa‚ Calcium and Vitamin D intake‚ medication‚ activity level‚ smoking‚ drinking. There are ways to keep those bones healthy! You can start by eating a diet that is rich in Calcium and Vitamin D. You can find these in dairy products‚ juice‚ cereals‚ and breads. Exercise! Start taking a walk or go dancing regularly. Make it fun. It doesn’t have
Premium Bone Muscle Vitamin D
for aluminum when the equation is balanced using the lowest‚ whole-numbered coefficients? a) 1 b) 2 c) 3 d) 4 5. Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoricacid. What is the coefficient for sulfuric acid when the equation is balanced usingthe lowest‚ whole-numbered coefficients? a) 1 b) 2 c) 3 d) none of these 6. What is the molar mass of calcium permanganate? a) 159 g/mol b) 199 g/mol c) 216 g/mol d) 278 g/mol 7. What is the molar mass of aspartic acid‚ C4O4H7N
Premium Oxygen Mole Water
heating was performed. B. The filtrate from III.A was used for the other tests. a.> Test for lactose. 5 drops of the filtrate was added with 3 ml Benedicts’ reagent. It was heated in a water bath. The results were noted. b.> Test for calcium ions. 1ml of the filtrate was added with 1 ml of (NH4)2C2O4 solution. c.> Test for phosphate. 3 ml of the filtrate was added with a few drops of 6M HNO3
Premium Milk Color Acid
Propelling a Rocket with Baking Soda and Vinegar Materials: * Vinegar * Baking Soda * Paper Towel * Funnel * Cork * In rocket: (instead of film canister) * Plastic Bottle * Pencils(stand) * Duct tape Procedures: 1. Take 1 scoop of baking soda 2. Put it in the middle of the paper towel‚ and then roll it. 3. Put the funnel in the mouth of the bottle‚ and pour vinegar before the duct tape.(it’s up to you) 4. Fix the cork‚ put some paper
Premium Carbon dioxide Oxygen Acetic acid
Kyphosis also known as “hunchback” occurs when the vertebrae in the upper back are wedge shaped instead of cylinder. This disorder can be caused by a number of things such as: Osteoporosis‚ Disk Degeneration‚ slouching/poor posture etc… Kyphosis can happen at any age but it’s most common in older women. In addition to an abnormally curved spine the symptoms can also cause back pain and stiffness in some people. Mild cases of kyphosis may produce no noticeable signs or symptoms. Depending on what
Premium Bone Osteoporosis Vitamin D
1. Describe Ossification during Fetal Development. Ossification is the formation of bone and in a fetus is made up of cartilaginous tissue. This tissue is less dense than that of bony tissue. Over time‚ as calcium salts are being deposited into the cartilaginous tissue by immature bone cells‚ the formation of bone occurs. 2. What are the roles of Osteoclasts in bone formation? Osteoclasts reabsorb bony tissue from the innermost part of the bones‚ allowing for a larger cavity‚ in order to avoid
Premium Bone Skeletal system Osteoporosis
flame that is produced. Flame tests are a common confirmation test to identify specific elements. Procedure: I began the lab by preparing a safe work area and the required metallic ions. The ions used in this lab were as follows: Barium Nitrate‚ Calcium Nitrate‚ Cupric Nitrate‚ Lithium Nitrate‚ Potassium Nitrate‚ Sodium Nitrate‚ Strontium Nitrate‚ and an unknown solution. I placed 0.5 mL of sodium nitrate into a well on the 24-well plate‚ recording its location. I placed 0.5 mL of the other 7 solutions
Premium Potassium Metal Alkaline earth metal