Friday, 11 March 2016 WALT: Key Words: A simple plan is constructed that will give numerical data. Objective: To be able to write a plan A fully detailed.

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Friday, 11 March 2016 WALT: Key Words: A simple plan is constructed that will give numerical data. Objective: To be able to write a plan A fully detailed plan that has all variables correct and that someone else could follow. A detailed plan is formed with appropriate variables stated. Plan, variables, independent, dependent, controls. 6* 5 4 Planning an Investigation

Riddle me this Take away oxygen and I no longer live, Heat and Light is what I so often give. I have so much energy that I just have to release, Hydrocarbons make a lovely feast! Get in my way and you’ll have a fright, I will certainly hurt, although I do not bite. What a peculiar riddle I hear you cry, But tell me this, just who am I !?!

time Distance Number of leaves Water loss (ml) Time (m) Gas Produced (ml) Height (m) Age (years) Spot the mistakes in these graphs (s) (m)

What do candles need to burn? Candles need oxygen to burn So what will happen if you place a beaker over a candle?

You have beakers of many different sizes; 50ml, 100ml, 250ml and 400ml but I have one ‘special’ beaker of; 300ml Task: using the equipment provided. Find out how long a candle will stay lit in my special beaker. Prizes for the group with the best scientific method AND closest match That’s all the help I am going to give you. Best of luck!

You are going to plan an experiment to test your ideas Planning an investigation Step 1 Decide what you will do to investigate your question Step 3 Getting Accurate results What variables do you need to control to make it a fair test? Step 4 Getting Precise Results What scale of measurement are you going to use? Step 2 Independent Variable What are you going to change? Dependent Variable What are you going to measure? Step 6 Do you need a control in your experiment? Step 5 What equipment are you going to need? Step 7 What do you Predict will happen and why?

Volume Time Were the results repeatable? (ml) (S) A graph drawn from other sized beakers can be used to predict an unknown sized beaker Size of beaker (ml)Time candle burned What sources of error could their have been? How could you have made your results more accurate?

Evaluation Now evaluate your experiment (the following sentences may help you evaluate in a scientific way): - –The pattern in my graph shows… –I think that my results are accurate / not accurate because… –The equipment I used helped my results to be accurate / caused them to be inaccurate because… –The anomalous results on my graph are… (they are anomalous because…) –To improve my experiment I would… this would help because…