[!]STUDY GUIDE: Big IdeasUse to answer form questions
1.Mass is always conserved; atoms rearrange but aren't created or destroyed. Students often think mass is lost or gained in chemical reactions, but evidence from investigations shows otherwise. Use data from today's stations to identify which observations best support this understanding.
2.Chemical changes form new substances; physical changes alter form but not composition. Students often think difficulty distinguishing chemical from physical changes, but evidence from investigations shows otherwise. Use data from today's stations to identify which observations best support this understanding.
3.Atoms are conserved; they rearrange into new molecules but aren't destroyed. Students often think reactions destroy or create atoms, but evidence from investigations shows otherwise. Use data from today's stations to identify which observations best support this understanding.
DRAWKEY TERMSGoogle each → Images tab → sketch what you see
A chemist pours a clear silver-nitrate solution into a clear sodium-chloride solution. Almost instantly a cloudy white solid swirls out of the liquid and settles to the bottom -- a precipitate. Atoms haven't disappeared; ions just rearranged into something insoluble.
How can mixing two clear liquids make something solid appear?
I think...
WRITEAFTER HOOK FORMReflect before continuing
I learned that...
Station 1 — Reaction Type Classification
I observed that...
This shows that...
The key concept is...
CHECKDAY 1 CHECK-INBefore you leave
Q1:Based on today's investigation of reaction types & conservation,
explain one key finding using evidence from your data. Connect your
answer to this week's focus question: How can mixing two clear
liquids make something solid appear?
Confidence:
Reaction Types & Conservation (Day 2)
Name: Period:
Station 2 — Balancing Equations Lab
The data shows...
This connects to...
The main idea is...
I can apply this by...
The connection to conservation of mass is...
DRAWCONCEPT MODELShow your understanding visually
Draw a particle model of ONE reaction type. Reactants → arrow →
products; atoms must balance. Label ≥3 of 5 terms below.
Word Bank: atom · reactant · product · coefficient
· balanced equation
≥3 word bank terms labeled
Reactants → products arrow
Atoms balanced (count match)
CHECKTEST YOUR THINKINGRate each: FALSE ← 1-2-3-4-5 → TRUE · 4 new + 1 last week + 1 spiral
1. Mass is lost or gained in chemical reactions — substances can truly disappear.
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2. Any color change automatically means a chemical reaction has occurred.
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3. A balanced chemical equation has the same number of each type of atom on both sides.
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4. Different reaction types (synthesis, decomposition, replacement) describe different ways atoms rearrange.
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5. [Last week] When something burns, mass is lost because the material disappears.
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6. [Spiral · C6 Circuits] Current is "used up" as it flows through a resistor, so less current exits than enters.
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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:
THINKSCIENTIST CIRCLE DEBRIEFReflect after your Scientist Circle discussion