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Scientific Method to the Rescue - PowerPoint PPT Presentation


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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
slide1

Scientific Method to the Rescue

Will the strongest towel please stand up!

slide2

Purpose

  • To practice the skills used in scientific investigations
  • To think like a scientist
slide3

Problem/Question

  • Many brands of paper towels claim to be the strongest.
  • Which brand of paper towel is the strongest?
slide4

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.
slide5

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.
slide6

Hypothesis

  • _____ is the strongest paper towel.

(Bounty, Brawny, Generic/school)

slide7

Experiment

Gather materials:

  • 3 brands of paper towels
  • Graduated cylinder
  • 2 jars with ring lid
  • Pennies
  • Water
  • Triple beam balance
slide8

Variables

  • Independent Variable:
  • Dependent Variable:
  • Controlled Variables:
slide9

Procedure

  • Step by step process to follow
  • Number the steps
  • Use complete sentences.
  • Be specific!
slide10

Procedure

1.

2.

3.

4.

5.

6.

slide11

Procedure

1.

2.

3.

4.

5.

6.

slide12

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
slide14

Graph

Use reduced data

slide15

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, ___.
slide16

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?
slide17

Congratulations!

You can

think

like a scientist!