2 Scientists are…CURIOUS – they ask questions that make them want to investigate.OBSERVANT – they look at the world around themCREATIVE – they think about what they already know to explain their observations and come up with plans to test their ideasSKEPTICAL – they question their own conclusions and except only explanations based on evidence
3 Science is the continuous process of asking questions and seeking answers!
4 Scientific InquiryThe process that allows us to think about and design an experiment to help us find the answers to our questions!
6 Problem Identify by asking a question Only part of the process that will end with a question mark.As you do research/perform the experiment… you make ask more questions!
7 Which brand of paper towels is the most absorbent? Our example…Which brand of paper towels is the most absorbent?
8 Written in the form of an IF/THEN statement. HypothesisThinkers…Tentative explanationEducated guess/predictionWhat do you think will happenwhen you perform your experiment?Written in the form of an IF/THEN statement.IF three brands of paper towels are tested, THEN Bounty will be the most absorbent.
9 ExperimentAn organized procedure used to study something under controlled conditions.Consists of two parts:MaterialsProcedure
10 Materials – items needed to perform the experiment Graduated cylinder, beaker, lab sheet, pencil, paper towels, triple beam balance, waterProcedure – sequence of actions or instructions to be followedThe STEPS of the experiment!22.214.171.124.5.
11 Variables Independent Variable (IV) – the factor being tested: paper towelsDependent Variable (DV) –the factor being measured:amount of water the paper towels absorby axisDVx axisIV
12 Constants Factors that remain the same throughout the experiment Examples:The size of the paper towelThe type of liquid usedUsing same balance to mass wet towelsOTHERS?
13 Control Serves as a basis for comparison Ex: a paper towel that is not wet
14 Trials The number of time the IV’s are tested The more the better! Not this kind!
15 ObservationsMade during the course of an experiment using your senses or equipmentOften recorded in data tablesExamples:TemperaturesTimesColor changes
16 Data One type of observation Evidence collected during a lab TRIAL 1 2 34TEMP
17 Results We often use charts and graphs to show our results. You may also write results statements that put your observations/data into paragraph form.
18 ConclusionStatement indicating whether your hypothesis was correct or incorrect.Use one of the following in your conclusion:SupportedRejectedCould neither support nor rejectExample:The results of my experiment rejected my hypothesis… go on to tell why.
19 Limitations Unforeseen problems with an experiments design What went wrong during the lab.Examples:Complete more trialsTest more paper towel brandsWe spilt something beside water on the towelsUsed the wrong massForgot to test one brand