Week 4: Molecular Structure & Properties - Grade 7 ScienceANSWER KEY
Name: Period: Date:
DRAW KEY TERMS Google each → Images tab → sketch what you see
molecular geometry
The 3D shape of a molecule
Bent
Atoms arranged at an angle (not straight)
Tetrahedral
Pyramid shape with 4 faces
linear
Atoms arranged in a straight line
OTHER VOCAB: symmetry · asymmetry · infrared radiation · greenhouse gas · vibration · dipole · carbon dioxide · water
WRITE FOCUS QUESTION Your initial thinking
Earth's atmosphere is mostly nitrogen and oxygen, yet those gases let heat escape freely into space. A tiny fraction of CO2 and water vapor, however, catches that outgoing heat like a blanket — and the difference comes down to molecular shape.
Why do some molecules trap heat while others don't?
I think...TODO: author answer text
WRITE AFTER HOOK FORM Reflect before continuing
I learned that... TODO: author answer text
Station 1 — Molecular Geometry
I observed that... TODO: author answer text
This shows that... TODO: author answer text
The key concept is... TODO: author answer text
CHECK DAY 1 CHECK-IN Before you leave
Q1: Based on today's investigation of molecular structure & properties (c3 bridge), explain one key finding using evidence from your data. Connect your answer to this week's focus question: Why do some molecules trap heat while others don't?
TODO: author answer text
Confidence:
| MS-PS1-1 | v4.3 Page 1 of 2
Molecular Structure & Properties (C3 Bridge) (Day 2)ANSWER KEY
Name: Period:
Station 2 — Structure-Property Patterns
The data shows... TODO: author answer text
This connects to... TODO: author answer text
The main idea is... TODO: author answer text
This connects to what we learned because...
I can apply this by... TODO: author answer text
DRAW CONCEPT MODEL Show your understanding visually
Draw a model that shows the main concept. Include labels and arrows to explain relationships.
TODO: author answer text
Labels included
Relationships shown
Key terms used
CHECK TEST YOUR THINKING Rate each: FALSE ← 1–2–3–4–5 → TRUE
1. All gases in the atmosphere trap heat equally — it depends on how much of each gas is present, not the type of molecule.
F12345T
2. A molecule's shape has nothing to do with whether it can absorb infrared radiation.
F12345T
3. Greenhouse gases work by physically blocking sunlight from leaving the atmosphere, like a glass ceiling.
F12345T
4. Carbon dioxide is a bent molecule because it contains the same atoms as water (carbon and oxygen).
F12345T
5. Oxygen and nitrogen make up most of the atmosphere, so they must be the main greenhouse gases responsible for keeping Earth warm.
F12345T
Pick any TWO statements — especially any you rated 2, 3, or 4. Justify your rating with evidence:
Statement #___ — I rated it ___ because:
Statement #___ — I rated it ___ because:
THINK SCIENTIST CIRCLE DEBRIEF Reflect after your Scientist Circle discussion
AHA! Moment
The one I changed my thinking most about is... TODO: author answer text
Remaining Question
I still wonder... TODO: author answer text
WRITE FOCUS QUESTION REVISIT Final written response
Why do some molecules trap heat while others don't?
Word Bank: molecular geometry · linear · bent · tetrahedral · symmetry · asymmetry · infrared radiation · greenhouse gas · vibration · dipole · carbon dioxide · water
TODO: author answer text
TODO: author answer text
TODO: author answer text
| MS-PS1-1 | v4.3 Page 2 of 2