BIOLOGY LAB Week 1 Scientific Method Complete Solution
- What is required of a scientific result? It must be open to revision in the light of new
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- A good scientific experiment is reproducible. What does this mean? Anyone can conduct the same experiment in another lab and expect similar results
- What distinguishes scientific results from non-science based claims? Scientific results have undergone systematic and critical testing
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Four phases: [1: Hypothesis ; 2: Experiment ; 3: Analysis ; 4: Report]
You’re the scientist; start process by making informal observations before forming hypothesis.
Do in each phase
Hypothesis = Create a strategy / formulate hypothesis
Experiment = Carry out strategy collect measurements
Analysis = Draw graphs evaluate hypothesis
Report = Document results compose a report
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(1) HYPOTHESIS PHASE
- In order to be of scientific value, it is important that a hypothesis should be ________. Testable
- Why is a good experiment design more important than a true hypothesis? (Check all that apply) Because a good experiment yields information even when the hypothesis is disproved
- Suppose your hypothesis is: “Braking distance grows linearly with speed.” What is the dependent variable? Braking distance
- What is more important: to choose the correct hypothesis or to test the hypothesis well? The right test is more important
- Suppose you study how speed affects the braking distance of a car [Match each part]
Formulate the hypothesis (=) Braking distance grows proportionally with speed
Choose a scope (=) We will focus on how braking distance depends on speed
Make strategy for testing the hypothesis (=) We will brake at various speeds but keep the car and other factors constant
- Why is testing strategy important in the design of an experiment? A good strategy will produce accurate results
- Which (?) can you ask yourself to determine the DEPENDENT VARIABLE of an experiment? What will I measure?
- What should your hypothesis represent? A possible explanation for a problem or observation
- Suppose your hypothesis is: “The braking distance grows linearly with speed.” Now lets make a strategy. Which factor will you vary in order to test the hypothesis? Speed
- Which (?) can you ask yourself to determine the independent variable of an experiment? What will I vary?
- What should your hypothesis represent? A possible explanation to a problem or observation
- Suppose your hypothesis is: “Braking distance grows linearly with speed.” What is the independent variable? Speed
- When you formulate your hypothesis, it is important to be sure that it is an idea that can be __________. Tested by scientific experimentation
(2) EXPERIMENT PHASE
- In real life, where would you usually perform the experiment phase? In a laboratory
- What would be natural to do in the experiment phase if the hypothesis is: “The heavier the ball, the faster it falls?” Measure the weight and the falling times of different balls
- What do you do in the LabSmart experiment phase? (Check all that apply) Carry out the strategy chosen in the hypothesis phase & Collect measurements in the notebook
- What would be natural to do in the experiment phase if your hypothesis is: “The braking distance grows linearly with speed?” Record the different speeds and distances & Measure the distance covered while braking & Get the car up to a certain speed
(3) ANALYSIS PHASE
- What do you do in the analysis phase? Graph the results & Make calculations based on the raw measurements & Judge whether the hypothesis is supported by the results
- The hypothesis is: “The braking distance grows linearly with speed.” What should be on the x-axis on the graph? Speed [Show Less]