Scientific Method to the Rescue

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# Scientific Method to the Rescue - PowerPoint PPT Presentation

Scientific Method to the Rescue Will the strongest towel please stand up! Purpose To practice the skills used in scientific investigations To think like a scientist Problem/Question Many brands of paper towels claim to be the strongest. Which brand of paper towel is the strongest?

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Presentation Transcript

Scientific Method to the Rescue

Will the strongest towel please stand up!

Purpose

• To practice the skills used in scientific investigations
• To think like a scientist

Problem/Question

• Many brands of paper towels claim to be the strongest.
• Which brand of paper towel is the strongest?

Research

• In research laboratories, papermakers test the paper they make for physical properties such as strength, absorbency, stretch, tear resistance, folding endurance, and stiffness. They also test for optical properties like transparency, opacity, brightness, color, and gloss.

Research

• Since paper towels are usually wet when they are being used, the “wet strength” of the towel is important. Wet strength is the strength of paper when wet. This can be measured by the amount of mass that a wet paper towel can hold.

Hypothesis

• _____ is the strongest paper towel.

(Bounty, Brawny, Generic/school)

Experiment

Gather materials:

• 3 brands of paper towels
• 2 jars with ring lid
• Pennies
• Water
• Triple beam balance

Variables

• Independent Variable:
• Dependent Variable:
• Controlled Variables:

Procedure

• Step by step process to follow
• Number the steps
• Use complete sentences.
• Be specific!

Procedure

1.

2.

3.

4.

5.

6.

Procedure

1.

2.

3.

4.

5.

6.

Analyze Data

• Chart including trials and reduced data (averages)
• Graph of reduced data
• Remember to label X and Y axis and give a specific title that relates to the purpose of the lab

Graph

Use reduced data

Conclusion

First paragraph (5 sentences)

• Restate the hypothesis.
• Do you accept or reject your hypothesis?
• Give 3 facts from your data that support the hypothesis. Look at your chart/graph.
• In conclusion, ___.

Conclusion

Second paragraph (5 sentences)

• How would you change this experiment if you repeated it?
• How can this information be used?
• Is it helpful information for individuals or society?
• Who cares about the results?

Congratulations!

You can

think

like a scientist!