Sarah Clay Internal Assessment Design Question: Does the caffeine in Coca-Cola affect blood pressure? Hypothesis: The amount of caffeine in Coca-Cola will cause to the adrenal glands‚ located on the top of the kidneys‚ to release more adrenaline which will in turn cause an increase in blood pressure. As the amount of Coca-Cola decreases‚ so will the difference between initial blood pressure and blood pressure after the consumption of the caffeine. Variables: Independent Variables | Dependent
Premium Blood pressure Caffeine
6.1.1 If the reaction produces heat (increases the temperature of the surroundings) then it’s exothermic. If it decreases the temp (i.e. absorbs heat) then it’s endothermic. Also‚ the yield of an equilibrium reaction which is exothermic will be increased if it occurs at low temps‚ and so for endothermic reactions at high temperatures. 6.1.2 Exothermic : A reaction which produces heat. Endothermic : A reaction which absorbs heat. Enthalpy of reaction : The change in internal energy (H) through
Free Thermodynamics Enthalpy Temperature
M10/5/MATHL/HP2/ENG/TZ1/XX/M+ MARKSCHEME May 2010 MATHEMATICS Higher Level Paper 2 Samples to team leaders Everything (marks‚ scripts etc) to IB Cardiff 13 pages June 8 2010 June 15 2010 –2– M10/5/MATHL/HP2/ENG/TZ1/XX/M+ This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of the International Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IB Cardiff. –3– M10/5/MATHL/HP2/ENG/TZ1/XX/M+
Premium Answer
GRE GRE Now duate ded gra by inten d optioniel major f aM w th the ow wiith score dattS N c ® Guide to the Use of Scores This publication includes: • Guidelines for the use of GRE® scores • Concordance information and percentile ranks oreSele Sc • Score interpretation and statistical information 2012–2013 www.ets.org/gre 19398 CONTENTS The GRE® Board and Its Committees ......................................................................................... 3 Overview of
Premium Graduate school
efficient. The externality is present if an economic activity (production or consumption) imposes costs on‚ or creates benefits for‚ third parties. If they impose costs on third parties they are considered negative externalities. Negative externality is a type of market failure. The government in London decided to impose tax on hauliers who use trucks that heavily polluted the environment. This is a negative externality since pollutions would hurt citizens in London. [pic] [pic] Figure
Premium Externality Market failure Pollution
How does light intensity affect the rate of photosynthesis? Does the amount of light intensity increase the rate of photosynthesis in a pondweed? Design aspect 1 Introduction My investigation will be centered on measuring the rate of photosynthesis and whether or not light intensity will affect it. The formula of photosynthesis is Carbon dioxide + water oxygen + glucose with the arrow referring to light energy as a means to convert the CO2 and H2O into oxygen and glucose. Logically‚ one would
Premium Oxygen Null hypothesis Carbon dioxide
AP/IB Biology Lab Assessment The effect of various fruit and vegetable cell membranes on their water potential Independent variable: Type of fruit or vegetable. (Produce used: Russet potatoes‚ Pascal celery‚ Gala apple‚ Navel orange‚ and Imperator carrot). The fruit or vegetable will be placed in six 56.7 gram cups‚ ranging with sucrose molarities of 0 (distilled water)‚ 0.2‚ 0.4‚ 0.6‚ 0.8‚ 1.0‚ with 5 trials‚ leading to 30 cups for each produce variable. Dependent variable: The water potential
Premium Standard deviation Mass Water
Combustion of a Wood Chip IB Chemistry 12 September 18‚ 2014 Ryan Ingham Table 1: Raw data collected from the temperature probe and scale for the water‚ the aluminum can and the wood chip. (Quantitative) Quantity Initial Temperature (±0.1K) Final Temperature (±0.1K) Aluminum Can 46.29g (±0.01g) 296.5 314.7 Water 250g (±0.1g) 296.5 314.7 Wood Chip Before: 4.64g(±0.01g) After: 3.29g (±0.01g) NA NA Table 2: Qualitative observations
Premium Soot Energy Enthalpy
STUDY SKILLS / QUIZ GUIDE ANSWER SHEET 1. Name 5 tools to have handy while studying pen/pencil‚ paper‚ highlighter‚ dictionary‚ ruler (etc.) 2. List 5 distractions one should avoid while studying windows‚ TV‚ video games‚ siblings/other people‚ music‚ food‚ pets‚ phone‚ computer‚ text‚ (etc.) 3. What is the difference between hearing and listening? Hearing only acknowledges noise; listening acknowledges and processes information presented by what one hears 4. Name 3
Premium Study skills Television Television program
IB HL BIOLOGY Dialysis Lab: Exploring Osmosis and Diffusion Through A Membrane Introduction: Dialysis is the flow of certain solutes through a semi permeable membrane. Dialysis is usually used on patients with failing kidneys to clinically purify blood in their kidneys‚ or other regions of their bodies. The dialysate contains waste matter that flows from the blood our of the dialysis tubing. Question/aim of lab: To test the solutions inside and outside the dialysis tubing with Benedict’s
Premium Dialysis tubing Diffusion Semipermeable membrane