+ Ionic Bonding Enquiry Noadswood Science, 2011

+ Ionic Bonding Enquiry To understand a hypothesis and a prediction, and represent data graphically Friday, May 15, 2015

+ Graphical Mistakes Look at the following graphs – can you identify the common mistakes in each?

+ Graphical Mistakes Look at the following graphs – can you identify the common mistakes in each? Categoric data – should be line graph Units incorrect – should increase incrementally

+ Graphical Mistakes Look at the following graphs – can you identify the common mistakes in each?

+ Graphical Mistakes Look at the following graphs – can you identify the common mistakes in each? 0 value should begin at xy cross Line of best fit needed

+ Hypothesis & Prediction Hypothesis – a proposal to explain certain facts or observations Prediction – a suggestion stating what will happen in the future, based on an observation, theory or hypothesis

+ Hypothesis & Prediction A bathroom light does not work – which are the following are predications and which are hypotheses? 1. If the light bulb is replaced it will work 2. The light bulb in the bathroom might not work because the power to the house is off 3. If every electrical appliance in the house does not work there is no power to the house, and that is why the light bulb does not work 4. The light bulb in the bathroom might not work because there could be a short in the circuit 5. The light bulb does not work because the bulb is burnt out 6. The light bulb will work after the fuse is changed

+ No Light Hypothesis – a proposal to explain certain facts or observations Prediction – a suggestion stating what will happen in the future, based on an observation, theory or hypothesis 1. If the light bulb is replaced it will work 2. The light bulb in the bathroom might not work because the power to the house is off 3. If every electrical appliance in the house does not work there is no power to the house, and that is why the light bulb does not work 4. The light bulb in the bathroom might not work because there could be a short in the circuit 5. The light bulb does not work because the bulb is burnt out 6. The light bulb will work after the fuse is changed

+ Hypothesis & Prediction A garden plant will not grow – which are the following are predications and which are hypotheses? 1. If a fertiliser is added to the plant it will grow 2. The plant might not grow if it does not have enough water 3. If a pesticide is sprayed on the plant it will not grow 4. The plant might not grow because the soil is lacking in nutrients 5. The plant will not grow if it has pests 6. If the plant is watered it will grow

+ No Light Hypothesis – a proposal to explain certain facts or observations Prediction – a suggestion stating what will happen in the future, based on an observation, theory or hypothesis 1. If a fertiliser is added to the plant it will grow 2. The plant might not grow if it does not have enough water 3. If a pesticide is sprayed on the plant it will not grow 4. The plant might not grow because the soil is lacking in nutrients 5. The plant will not grow if it has pests 6. If the plant is watered it will grow

+ Enquiry Hypothesis for the enquiry – when conducting an experiment if you have a larger mass of a reactant then a larger mass of product must be made, as more atoms will be bonding… Split into pairs and conduct the experiment using the different mass of copper (every pair has a different mass which you must weigh) The copper will react with oxygen in the air when heated – you will need to weigh the copper oxide which forms to find out how much has been formed You then need to compare the start and finishing mass…

+ Prediction & Graphing Before you start your experiment write down your prediction concerning the mass, and when the experiment is completed record your results in the class table and then draw out a suitable graph… Experiment: - 1. Weigh your start mass of copper 2. Heat the copper for two/three minutes using the full flame 3. Let the apparatus cool, then weigh the copper oxide formed 4. What is the mass change of the experiment?

+ Class Results GroupStart Mass Copper (g)End Mass Copper Oxide (g) Mass Difference +/- (g) Write your group results in the table, then graph mass of copper against mass of copper oxide

+ Graph You should have plotted a graph of the mass of copper (on the x-axis) and the mass of copper oxide (on the y-axis) Units should have been included (g) and a line of best fit drawn… Mass of copper (g)Mass of copper oxide (g)