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Bubbles, Bubbles Everywhere!. Lab Activity over Scientific Method, Measurement & Graphing. - PowerPoint PPT Presentation

Bubbles, Bubbles Everywhere!

Bubbles, Bubbles Everywhere!

Lab Activity over Scientific Method, Measurement & GraphingYou and your lab group will be developing :

1. problem statement,2. hypothesis,3. identifying variables and 4. procedure

for this lab activity based on the materials and safety precautions that are provided below.

At the end of the lab you will need to make a bar or line graph of your results draw a conclusion. Was your hypothesis correct or incorrect? Each partner will turn in their work on a piece of notebook paper.Lab Write Up:On your own note book paper you need a:TitleProblem StatementHypothesisIndependent/ Dependent VariableConstants/ControlsProcedureData table with your resultsGraph of your resultsConclusion

MaterialsRuler50mL of Dawn soap solution50mL of Palmolive soap solution50 mL of Extreme Bubbles soap solutionStraws3- 50 mL BeakersPaper towelsFlat surface- lab table/desk

Safety PrecautionsGoggles must be worn during this lab investigation.Do not drink or ingest the liquid soap solutions.A straw is assigned to each person, do not share straws and throw away your straws as soon as you finish.

Data TableType of SoapTrial 1Trial 2Trial 3AverageGraphing Review

PieBarLineThree main types of graphs:What are these graphs trying to communicate? You see numbers and names, but without background we really do not know what these graphs are trying to communicate.Lets look at an example of how a graph is used...When a scientist conducts an experiment, he/she carefully observes what is happening.He/She records information called data.The data is often a set of numbers.

Time (s)Temp. (C)0 s15 030 s18 060 s20 090 s22 0It is important for scientists to be able to take data...And make it into a visual picture of what the data says...#'sIn order to make valid conclusions from experiments...

Such as numbers

What does this data look like?

TimeTempLine graphs take data and give us a picture of what that data looks like:This graph helps us to understand the relationship between time and temperature.

Experiment: You are measuring the temperature in degrees Co of a water sample as it is heated over a period of 30 minutes. A variable is what changes in an experiment.changeschangesVariables

independentdependentvariablesTo make graphsYou need to know how to recognize theExperiment: You are measuring the temperature in degrees Co of a water sample as it is heated over a period of 30 minutes. You DECIDE the interval (each minute) to collect data (temperature). Time (min)Temp. (C)0 min0 01 min0 02 min0 03 min1 0

4 min5 0

Interval you collect data or independent variableThe data collectedor dependent variableatit istimetemperature

In this table there are two variables:

Timetemperature

Which is the independent variable?

...is the independent variable because this is the specific interval you chose to collect data. The scientist controls this variable.temperature

Which is the dependent variable?

...is dependent on the time so the temperature is the dependent variable. This is the data that a scientist collects.Determine the independent and dependent variables in your table.2. Label each axis: x-axis independent and y- axis dependent.4. Number and label each axis.5. Plot the data points.6. Connect the data points.7. Title the graph.3. Find the variable range: middle value is halfway on the graph scale. Constructing a Graph::Sheet1TimeTemp. in C0 min01 min02 min03 min34 min145 min256 min367 min478 min589 min6910 min8011 min9112 min9813 min9814 min9815 min100

Sheet2

Sheet3

Sheet1TimeTemp. in C0 min01 min02 min03 min34 min145 min256 min367 min478 min589 min6910 min8011 min9112 min9813 min9814 min9815 min100

Sheet2

Sheet3

Sheet1TimeTemp. in C0 min01 min02 min03 min34 min145 min256 min367 min478 min589 min6910 min8011 min9112 min9813 min9814 min9815 min100

Sheet2

Sheet3

Sheet1TimeTemp. in C0 min01 min02 min03 min34 min145 min256 min367 min478 min589 min6910 min8011 min9112 min9813 min9814 min9815 min100

Sheet2

Sheet3

Sheet2

Sheet3