Week 3: Week 3 Content
Grade 8 Science | Rosche | Kairos Academies
**Choose Your Path:** Select one of the following investigation pathways based on your interests: - **Path A:** [topic-specific content] - **Path B:** [topic-specific content] - **Path C:** [topic-specific content]
**Specialist Track:** As you progress, you'll develop expertise in [topic-specific content]. Advanced learners: try the extension challenge at the bottom of this page.
**Career Connection:** [topic-specific content] scientists and engineers use these skills daily in careers like [topic-specific content]. High school [topic-specific content] builds on these concepts.
**You're in Control:** Design your own investigation to answer: [topic-specific content]. Use the scientific method, but YOU decide the procedure, materials, and data collection strategy.
Accessibility & Learning Support
- Need text read aloud? Chrome: Right-click then "Read aloud" | Edge: Click speaker icon
- Working from home? See the "At-Home Instructions" box below
- Need extra support? Click green "Need help?" buttons for hints
- Stuck? Look for red "Stuck?" boxes with step-by-step help
Working From Home?
- All forms: Work completely online - no physical materials needed
- Simulations: Heating curve simulation is embedded in the form
- Time: Budget ~75 minutes total with short breaks between stations
- Questions? Email Mr. Rosche before starting if you're confused
Week 3 Progress Check
- This is WEEK 3! You'll see spiral questions from Weeks 1 AND 2.
- KEY CONCEPT: Specific heat = energy needed to raise 1 gram by 1°C
- Engineering Focus: Design devices using thermal property data
NGSS Standards
MS-PS3-3 (Primary)
Apply scientific principles to design, construct, and test a device that minimizes or maximizes thermal energy transfer.
Phenomenon: Engineering the Perfect Cooler
Compare three coolers:
- Cooler A: Thin plastic walls, cheap → Ice lasts 12 hours
- Cooler B: Thick foam walls, medium price → Ice lasts 3 days
- Cooler C: Vacuum-insulated walls, expensive → Ice lasts 7 days
Why does the same ice last different times in different coolers?
How can we design materials with specific thermal properties?
▼ Environmental Justice: Materials science and climate equity in St. Louis neighborhoods ▼
Materials Engineers & Climate Justice
St. Louis summers are getting hotter—neighborhoods without tree coverage can be 10-15°F warmer than areas with parks. Building materials matter: asphalt absorbs heat (low specific heat), while green roofs and reflective surfaces stay cooler. Dr. Aprille Ericsson, NASA's first Black woman aerospace engineer, studies thermal properties of materials for spacecraft—the same principles apply to sustainable building design. In North City St. Louis, community organizations advocate for reflective roofing and increased tree planting in historically redlined neighborhoods where heat vulnerability is highest. Materials engineers ($70k-$110k) and thermal analysts ($65k-$95k) design climate-resilient infrastructure. Your understanding of thermal properties helps you advocate for equitable cooling solutions.
Word count: 140 words
Vocabulary
Cognate Strategy: Many science words look similar in English and Spanish — use your Spanish to learn science!
| Term | Spanish | Definition |
|---|---|---|
| specific heat | calor específico | Energy needed to raise 1g by 1°C |
| thermal conductivity | conductividad térmica | How fast heat travels through material |
| insulation | — | Material that slows heat transfer |
| temperature change | — | cambio de temperatura |
| thermal energy | energía térmica | Energía del movimiento de partículas / Energy from particle motion |
| material properties | — | propiedades de materiales |
| device | — | dispositivo |
Worked Example and Simulation
General Strategies
- Read the ENTIRE question before answering
-
Look for key words: "specific heat,"
"conductivity," "insulation"
- Eliminate wrong answers first
-
Skip difficult questions and come back later
Common Mistakes to Avoid
-
Don't confuse HIGH specific heat with FAST heating (it's the
opposite!)
-
Don't forget: metals CONDUCT heat well but have LOW specific heat
-
Don't mix up insulators (block heat) with conductors (transfer
heat)
Step-by-Step Problem Solving
General Strategies
- Read the ENTIRE question before answering
- Look for key words: "specific heat," "conductivity," "insulation"
- Eliminate wrong answers first
- Skip difficult questions and come back later
Common Mistakes to Avoid
- Don't confuse HIGH specific heat with FAST heating (it's the opposite!)
- Don't forget: metals CONDUCT heat well but have LOW specific heat
- Don't mix up insulators (block heat) with conductors (transfer heat)
Problem Scenario
Review the problem scenario and work through each step below.
Simulation: Thermal Properties
PREDICT (before running the sim)
Look at the simulation controls. Before changing any variables, predict what will happen when you adjust them. Write your prediction down.
OBSERVE (while using the sim)
Change one variable at a time. Record what happens after each change. Use the data journal to capture at least 3 trials.
EXPLAIN (after collecting data)
Compare your observations with your prediction. Use scientific vocabulary to explain the patterns you found. What surprised you? What confirmed your thinking?
Station 1 - Specific Heat Investigation
20 Points | ~15 Minutes
COMPLETE STATION 1 FORM
Includes spiral from W2 (conduction)
[EMBED G8.C1.W3 Station 1 Form Here]
Form ID: ________________
Station 2 - Material Property Analysis
20 Points | ~15 Minutes
COMPLETE STATION 2 FORM
Includes spiral from W1 (particle motion)
[EMBED G8.C1.W3 Station 2 Form Here]
Form ID: ________________
Station 3 - Design a Thermal Device
25 Points | ~20 Minutes (Highest Value!)
COMPLETE STATION 3 FORM
[EMBED G8.C1.W3 Station 3 Form Here]
Form ID: ________________
▼ ⭐ Hedy Lamarr: Hollywood actress and inventor who pioneered frequency-hopping technology requiring precision materials engineering ▼
⭐ Scientist Spotlight: Hedy Lamarr (1914-2000)
Actress, Inventor, & Pioneer in Materials Engineering
From Hollywood to the Lab: A Dual Genius
Most people know Hedy Lamarr as a glamorous Hollywood actress in 1940s films. But her real legacy lies in engineering and materials science. During World War II, while living in the United States, Lamarr worked with composer George Antheil to develop frequency-hopping spread spectrum—a breakthrough technique that prevented enemy interception of military radio signals.
The Innovation: How Did It Work?
Lamarr's system rapidly switched between different radio frequencies—like changing channels constantly—to prevent eavesdropping. The transmission device and receiver had to be synchronized using piano roll technology! This required precision engineering of materials to handle rapid frequency changes without losing signal strength.
Her patent (U.S. Patent #2,292,387) wasn't used during WWII, but decades later it became the foundation for modern WiFi, Bluetooth, and cell phone technology. It represents a critical principle in materials engineering: selecting materials based on their ability to handle thermal stress and electromagnetic properties under extreme conditions.
At age 89, Lamarr received the ELIA Inventor Award, finally earning recognition for her contributions to engineering. Her story reminds us that innovation doesn't happen in one place or time—it requires curiosity, collaboration across disciplines, and understanding materials deeply enough to push their boundaries.
Connection to Week 3: Just like Lamarr needed to choose materials that could withstand rapid electromagnetic changes without overheating, YOU'RE choosing materials based on specific heat and conductivity for your thermal device design!
St. Louis Context: Building Materials for Extreme Temperature Swings
Why Missouri Engineers Care About Thermal Properties
St. Louis's extreme swings (90-100°F summers, sub-zero winters) challenge engineers selecting building materials. High-specific-heat materials like concrete absorb heat slowly, while low-conductivity foam insulation keeps interiors comfortable year-round. Reflective roofs reduce summer heat absorption; special window coatings reflect UV while allowing light. HVAC costs represent 40-50% of St. Louis electricity bills—better material selection directly reduces costs. When you design your thermal device, you're solving real St. Louis engineering problems!
Exit Ticket - Thermal Properties Integration
23 Points | ~15 Minutes
COMPLETE EXIT TICKET
[EMBED G8.C1.W3 Exit Ticket Form Here]
Form ID: ________________
Key Formula: Q = mcΔT
Q = mcΔT
Heat (J) = mass (g) × specific heat (J/g°C) × temperature change (°C)
Example: How much energy to heat 100g of water by
10°C?
Q = 100g × 4.18 J/g°C × 10°C = 4,180 Joules
Practice These Vocabulary Terms
▼ 🆘 Still Stuck? General Test-Taking Strategies ▼
Enrichment & Extension
Optional deep dives for early finishers.
Optional content if you finish early or want to go deeper.
Scientist Spotlight
Research a scientist who contributed to this week's topic area and describe their key findings.
Environmental Justice Connection
Explore how this week's science concepts connect to environmental justice issues in our community.