Published on February 8, 2014
1 Background information
Using the Internet ● Books (library) ● Specialists in that field ● to answer some questions before you start. www.dkit.ie
2 Aim Hypothesis Engineering goal Investigative question
How do I pick 1ne? www.wix.com
Aim Classroom experiments “To...” Proving a known fact
Hypothesis Used with I.Q. and E.G. If the independent variable does this, then the dependent variable will do that.
Engineering goal Stating why you built something.
Investigative question Asking about the relationship between variables: What is the relationship between the independent variable and dependent variable?
What do we do to construct a method ? science.howstuffworks.com
Identify the variables.
Identify the equipment used, and describe HOW it will be used.
Step-by-step instructions on how the experiment runs.
All information in point form.
Table All data is tabulated in the course of the experiment. Independent variable (unit) No units next to values Dependent variable (unit) No units next to values
Y-axis Dependent variable Units 0 at the bottom, maximum value at the top. Graph A heading should indicate the relationship between the independent and the dependent variables. Always use clear indicators Connect the indicators using the line of best fit X-axis Independent variable Units 0 far left, maximum value far right
Analysis Discuss (point form): Relationship of variables Outliers
In point form: Evaluate your hypothesis Explain relationship between Variables Chemistry: Provide balanced equations
6 Bibliography acknowledgements
Books Author's surname and initials, year of publication, title (underlined), edition, place of publication, publisher.
Journals Author's surname and initials, year of publication of the journal, title of article (underlined), title of journal, volume, pages
Chapters in books Author's surname and initials, title of book, chapter title (underlined), edition, place of publication, publisher.
Newspaper articles Year, newspaper, date and month page
Internet referencing www. ... Page heading Straight URL Access date
Theses and dissertations Author's surname and initials, year of publication, title (underlined), degree the thesis is for, university, city where university is located
Acknowledgements Name of person providing assistance, what they provided assistance with.
1 2 types of proportionality
Direct Inverse x y k = y/x x y k 400 40 0,1k 60 30 1800 300 30 0,1k 75 24 1800 200 20 0,1k 90 20 1800 50 5 0,1k 120 15 1800 yαx k(constant) = y/x Always a straight line through the origin. 1 y α /x k(constant) = xy y-x graph = hyperbole y-1/x2 = straight line
Direct Inverse x2 y k = y/x2 x x2 y k = yx2 2 4 1 0,25 3 9 2,25 0,25 1 1 10 10 4 16 4 0,25 2 4 2,5 10 5 25 6,25 0,25 4 16 0,625 10 5 25 0,4 10 x 2 yαx k(constant) = y/x y-x graph = parabola y-x2 graph = straight line through origin. 2 1 y α /x2 k(constant) = x2y y-x graph = hyperbole y-1/x2 = straight line
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