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Published byΕἰλείθυια Στεφανόπουλος Modified over 5 years ago
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What is SCIENCE? A way to answer questions & solve problems
How we understand the world around us A way or process used to investigate what is happening around you It provides possible b
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The scientific method/ Experimental Design
A way to solve a problem
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What’s the problem anyway?
Identify what you want to investigate
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Form a Hypothesis What do you think your experiment will show
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HYPOTHESIS A statement that can be tested by conducting an experiment
Prior knowledge, new information, observations can be used to form a hypothesis IF…THEN…BECAUSE
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Research the problem Learn more about your subject
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Design an experiment to test your hypothesis
Write step by step procedures describing how to test your hypothesis Gather all materials you will need
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Record your data Data Tables
A way to record results and observations accurately Have a descriptive title Divided into columns & rows
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Title Describing the Data
Trial Variable 1 Variable 2 Variable 3 1 2 3 4 5 Average
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Analyzing the data Reduce the data Graph the data
Do something to make the amount of data smaller Graph the data Lets us see trends, patterns, relationships, comparisons Bar graphs Let us compare data Line graphs Lets us see trends or changes
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State a conclusion Was your hypothesis supported?
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Conclusions How we sum up the investigation?
Does the data support the hypothesis? If it does – we accept the hypothesis If it does not – we reject the hypothesis Always back up what you say with data Evidence Discuss issues or problems with the investigation Discuss the importance or relevance of the investigation
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How do scientists COMMUNICATE the results of their work?
Finding out something new doesn’t do anyone any good unless the new knowledge is shared Reported in scientific journals Science journals Presentations to other scientists
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What are the three types of variables?
Independent variables Dependent variables Controlled variables Also called constants
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Independent variables are…
What is being tested What is purposely changed by you The difference between the groups The ‘cause’ of a change
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Dependent variables are…
What is observed What is measured The data The ‘effect’ caused by the independent variable This changes as a result of you changing the independent variable
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Controlled variables are…
Things that could change, but don’t Kept constant by the scientist Allow for a fair test
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For example… How does the temperature of ocean water affect the speed of a hurricane? Independent variable Temperature of ocean water Dependent variable Speed of a hurricane
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