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Material Strength Bridge Investigation
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Material Strength Bridge Investigation
🔍 Part 1: Pre-Investigation Questions
1. Which material do you predict will be stronger for building a bridge?
Newspaper
Paper straws
Both will be equally strong
2. Explain your prediction. Why do you think this material will be stronger?
3. What properties make a material good for building bridges? (Check all that apply)
Strength
Flexibility
Stiffness
Load-bearing ability
4. To make this a fair test, which variables should we keep the same?
Amount of sticky tape used
Bridge length
Type of weights used for testing
Type of material (this is what we're changing!)
📊 Part 2: Data Collection and Analysis
5. Record your bridge testing results in the table below:
Bridge Material: ____________________
| Trial Number | Maximum Load (number of weights) | Observations |
|---|---|---|
| 1 | ||
| 2 | ||
| 3 |
6. Calculate the average maximum load your bridge carried:
Average = (Trial 1 + Trial 2 + Trial 3) ÷ 3 = ________ weights
7. Compare your results with the other group. Which material was stronger overall?
Newspaper bridges were stronger
Paper straw bridges were stronger
Both materials were equally strong
8. Was your prediction correct? Circle one: YES / NO
Explain what surprised you or confirmed your thinking:
📝 Part 3: Drawing Conclusions
9. Based on your investigation, which material would you recommend for building a bridge? Use evidence from your data to support your answer.
10. What properties of the winning material made it more suitable for bridge construction?
11. If you could design and test another bridge, what would you change to make it even stronger?
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