Designing & Revising a Collision Protector — Drills · Grade 8 Science
Chapter: MotionWhat these drills covers
By the end of Designing & Revising a Collision Protector you should be able to:
- I can define a protector’s criteria and constraints and evaluate repeated test records.
- I can propose a mechanism-based revision and plan a controlled retest.
4 questions, written answer, each with a worked explanation.
Vocabulary used: criterion, constraint, stakeholder, operational definition, iteration, model, evidence, system boundary, assumption.
Problem 1
Answer and explanation
A fixed rule allows consistent judgments and avoids changing success criteria to favor a preferred design.
A fixed rule allows consistent judgments and avoids changing success criteria to favor a preferred design.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.
Problem 2
Answer and explanation
No. It can lower pressure for the same force by spreading contact area, but total force depends on the stopping interaction.
No. It can lower pressure for the same force by spreading contact area, but total force depends on the stopping interaction.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.
Problem 3
Answer and explanation
It omits its other readings and variability. Evaluate all planned trials along with constraints and damage observations.
It omits its other readings and variability. Evaluate all planned trials along with constraints and damage observations.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.
Problem 4
Answer and explanation
No. Features can interact and violate limits. The revised design requires new tests under the same evaluation rules.
No. Features can interact and violate limits. The revised design requires new tests under the same evaluation rules.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.