Week 3: Synthesis & Assessment

Grade 7 Science | Rosche

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📋 Week 3: Synthesis & Assessment 🎯

Grade 7 Science | Rosche

Cycle 3 Cumulative Assessment | 100 Points Total | ~75 Minutes

⚠️ ASSESSMENT WEEK - Important Information

  • This is your cumulative assessment for Cycle 3 Climate Change unit.
  • You may NOT go back once you submit each part.
  • Complete all 3 parts in order: Synthesis → Assessment → Misconception Check
  • Take breaks between parts - your brain works better with rest!
  • Ask Mr. Rosche if you need clarification on any question.

📝 What You Need to Know (Review Guide)

Week Key Concepts
Week 1
Greenhouse Effect
  • CO2 absorbs IR and vibrates (doesn't break)
  • 3+ atom molecules absorb IR (CO2, H2O)
  • Carbon cycle - atoms conserved
  • Photosynthesis equation: 6CO2 + 6H2O → C6H12O6 + 6O2
Week 2
Feedback Loops
  • Albedo = fraction of light reflected (high = cool, low = hot)
  • Positive feedback = change amplifies itself
  • Ice-albedo feedback: melting → dark ocean → more absorption → more melting
  • Carbon sink saturation: warm ocean absorbs less CO2
Cycle 2
Spiral
  • Breaking bonds REQUIRES energy (not releases!)
  • Forming bonds RELEASES energy
  • Conservation of mass: atoms rearranged, never created/destroyed

🎯 Practice These Vocabulary Terms

⚠️ Common Mistakes to Avoid

❌ WRONG ✅ CORRECT
"Breaking bonds releases energy" Breaking bonds REQUIRES energy; forming bonds releases energy
"Mass disappears in reactions" Mass is conserved; atoms rearrange but are never destroyed
"Positive feedback is good" Positive means AMPLIFYING (same direction), not beneficial

🔗 Part 1: Synthesis Review

20 Points | ~15 Minutes | Connects Week 1 + Week 2

What you'll do:

  • Create a diagram connecting greenhouse effect, feedback loops, and human emissions
  • Identify the primary driver of climate change
  • Explain how the complete system works together
  • Connect to Cycle 2 conservation concepts

📝 COMPLETE PART 1

⏸️ Take a 5-minute break before Part 2!

📝 Part 2: Cumulative Assessment

60 Points | ~40 Minutes | All Learning Targets

Sections:

  • Section A: Greenhouse Effect (15 pts) - Molecular mechanisms
  • Section B: Carbon Cycle & Conservation (15 pts) - Calculations + concepts
  • Section C: Albedo & Feedback Loops (15 pts) - System thinking
  • Section D: Integration (15 pts) - Connecting everything

⚠️ You cannot go back once you submit. Read carefully!

📝 COMPLETE PART 2

⏸️ Take a 5-minute break before Part 3!

🎯 Part 3: Misconception Check

20 Points | ~20 Minutes | Final Chance!

What this tests:

  • Bond Energy: Breaking bonds requires energy (most common mistake!)
  • Conservation of Mass: Atoms are never created or destroyed
  • These questions are designed to catch common errors - think carefully!

📝 COMPLETE PART 3

🎉 Cycle 3 Complete!

Congratulations on finishing the Climate Change unit!

Key Takeaways:

  • CO2 absorbs IR → molecules vibrate → heat trapped
  • Carbon is conserved through all Earth systems
  • Positive feedback loops accelerate climate change
  • Multiple feedbacks interact and amplify each other

Self-Assessment

Reflect on your learning this cycle. Rate your confidence on each topic covered.