Matter Properties Classification Worksheet
Physical Science Investigation Guide
Matter & Physical Properties
Name:
Date:
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Learning Targets: • Observe & describe physical properties • Use evidence: pure substance vs. mixture • Classify by observed patterns
1 Core Concepts & Property Descriptors
Fill in the missing key scientific terms
| Key Concept |
Scientific Definition & Core Rule |
Household Lab Examples |
Observation Protocol |
| Physical Property |
A characteristic of matter that can be observed or measured WITHOUT changing its chemical _______________. |
Color, luster, texture, particle shape, state of matter, boiling point. |
Use senses (eyes, touch) or tools (hand lens, light, ruler, scale). |
| Luster |
How light _____________ off the surface of a substance (shine vs. dullness). |
• Shiny / Glassy: Salt, Sugar |
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| • Dull / Matte: _______________ |
Hold sample under direct light; check if grains sparkle or absorb light. |
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| Texture & Particle Shape |
The surface feel and geometrical _____________ of individual grains/particles. |
• Granular / Crystalline: Salt, Sugar |
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| • Fine / Powdery: Cornstarch, Flour |
Gently rub a pinch between fingertips; inspect under hand lens. |
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| Pure Substance |
Matter made of only _____________ type of atom or molecule with uniform properties throughout. |
Table Salt (Sodium Chloride), Pure Sugar (Sucrose), Distilled Water. |
Single particle type visible; uniform color, shape, and melting behavior. |
| Mixture (Heterogeneous / Homogeneous) |
A blend of two or more substances that are physically mixed but NOT ______________ combined. |
Italian dressing, soil, saltwater, iron filings + sulfur, air. |
Look for multiple particle types, settling layers, or separation by physical means. |
2 Household / Lab Observation Tasks
Record evidence using direct observation and hand lens
| Test Sample |
Luster / Reflectivity |
Texture & Particle Shape |
Uniformity Across Sample |
Initial Classification Clues |
| Sample 1: Table Salt |
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| Dry sodium chloride grains |
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| Sample 2: Cornstarch |
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| Fine white powder |
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| Sample 3: Italian Dressing |
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| Oil, vinegar, herbs |
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| Sample 4: Sand & Soil |
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| Grit, humus, pebbles |
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Quick Check: Why is observing particle shape under magnification more reliable for identifying a pure substance than simply looking at its color across the room?
Part 1: Physical Observation & Vocabulary Turn to Page 2 for Classification & Evidence Reasoning → Page 1 of 2
Scientific Reasoning & Evidence
Classification by Observed Patterns
Student Name:
Substance Decision Protocol (Use to Justify Your Claims)
1. Particle Uniformity Are all observed grains/particles identical in crystal shape, color, and luster?
2. Phase Distribution Are there visibly distinct components, settling layers, or suspended specks?
3. Physical Separation Can components be isolated using physical tools (filtration, settling, magnet)?
3 Mystery Samples: Claim, Evidence, & Reasoning
Determine classification and cite specific physical evidence
Sample A: Clear, colorless liquid. Boiled at a fixed temperature of 100°C until completely evaporated, leaving zero residue behind in the beaker.
[ ] Pure Substance [ ] Mixture
Physical Evidence & Pattern Reasoning:
Sample B: Cloudy amber liquid with green flakes. When left undisturbed for 5 minutes, it separates into two distinct liquid layers with flecks settled at the bottom.
[ ] Pure Substance [ ] Mixture
Physical Evidence & Pattern Reasoning:
Sample C: Granular powder containing dark metallic grains and light tan grains. A magnet pulled the dark grains away, leaving the tan grains untouched.
[ ] Pure Substance [ ] Mixture
Physical Evidence & Pattern Reasoning:
Sample D: White crystalline solid. Hand lens reveals every single grain is an identical sharp cube with glassy luster and uniform hardness.
[ ] Pure Substance [ ] Mixture
Physical Evidence & Pattern Reasoning:
4 Scientific Synthesis & Justification
A classmate claims: “If a mixture looks completely uniform to the naked eye (like clear saltwater), it must be a pure substance.” How can physical properties and physical separation prove this claim false?
Target Check: Observed physical properties Cited evidence for pure vs. mixture Classified by patterns
Physical Properties & Matter Classification Standard: MS-PS1-1 & MS-PS1-2 Evidence Tasks Page 2 of 2
Matter Mysteries Slides
Physical Science Investigation
MS-PS1-1 • MS-PS1-2
Matter & Physical
Properties
Investigate observable clues, discover microscopic patterns, and classify substances using scientific evidence.
Observation • Classification • Evidence Laboratory Guided Lesson
Bellringer: Mystery Kitchen Powders
5 Minutes • Silent Work
On a sheet of paper: Write your Name, Date, and Bellringer: Matter Clues at the top.
Independent Work
The Scenario
The Unlabeled Jars
You find two identical glass jars on a kitchen counter. Both hold fine, white crystal powders: one is table salt and one is cane sugar.
Lab Safety: You may NOT taste either sample!
Write on Your Paper
1
Observation Test
List TWO safe physical properties you could observe or test to help tell them apart without tasting.
2
Predict & Classify
If you dissolve a spoonful of salt completely into warm water, is the result a pure substance or a mixture? Explain in 1 sentence.
Keep your paper on your desk — we will share answers in 5 minutes! Entry Task
Mission Learning Targets
Goals for Today
Target 01
Observe Properties
Identify luster, texture, and particle shape without altering the substance.
Target 02
Classify Patterns
Distinguish between pure substances and mixtures using observable criteria.
Target 03
Defend with Evidence
Support your claims with physical separation tests and uniform particle data.
Have your Matter Properties Classification Worksheet open and ready to record findings.
Defining Physical Properties
Concept 01
Scientific Definition
A characteristic of matter that can be observed or measured WITHOUT changing its chemical identity.
Observable Directly
Examined using senses and magnification:
Luster Texture Particle Shape Color & State
Measurable with Tools
Quantified with laboratory instruments:
Mass & Volume Density Boiling Point (100°C) Solubility
Rule: Ice melting into water is still H₂O — physical changes do not make new substances! Worksheet Part 1 Check
Focus Property: Luster
Light Interaction
Luster describes how light reflects off the surface or crystals of a material.
Shiny / Glassy / Sparkly
Light bounces cleanly off clean crystal facets or smooth surfaces, producing bright flashes and reflection.
Lab Samples: Table Salt (NaCl), Cane Sugar, Quartz, Metals.
Dull / Matte / Earthy
Light is absorbed or scattered in every direction by microscopic irregular surfaces with no visible shine.
Lab Samples: Cornstarch, Chalk dust, Flour, Soil particles.
Observation Protocol: Hold the sample directly beneath your light beam and rotate slowly to watch for sparkle.
Texture & Particle Geometry
Micro-Patterns
Crystalline / Granular
Rough / Sharp
• Particles display distinct geometrical shapes (cubes, prisms, sheets).
• Feels gritty or sandy when rolled between fingertips.
• Indicates rigid, organized atomic or molecular lattice structures.
Prime Example: Table salt forms tiny geometric cubes!
Fine / Powdery
Silky / Smooth
• Particles are too small for individual edges to be seen with simple lenses.
• Feels soft, velvety, or slippery to the touch.
• Tends to clump together rather than pour as discrete grains.
Prime Example: Cornstarch forms smooth, fine powder!
• Touch test: Roll a pinch between index finger & thumb • Lens test: Position hand lens 2 inches from sample • Record in Table 2
The Big Divide: Pure vs. Mixture
Classification
Category A
Pure Substance
• Made of only ONE type of atom or molecule throughout.
• 100% constant, uniform properties in every single sample.
• Has fixed melting, boiling, and freezing points.
• Cannot be physically separated into other substances.
Examples: Pure Gold (Au), Table Salt (NaCl), Distilled Water (H₂O).
Category B
Mixture
• Physical blend of TWO OR MORE substances together.
• Each component keeps its own original physical properties.
• Variable composition (more or less salt in the water).
• Can be physically separated (filtering, boiling, magnets).
Examples: Italian Dressing, Saltwater, Potting Soil, Air, Granite.
Key Test Question: “Can I separate these parts without breaking chemical bonds?”
Substance Decision Protocol
Worksheet Page 2 Tool
Use this 3-question scientific filter to classify every unknown sample:
1
Particle Uniformity
Are all grains identical in crystal shape, color, and luster under magnification?
No → Mixture
Yes → Continue to Step 2
2
Phase Distribution
Are there visibly distinct components, settling layers, or suspended floating flecks?
Yes → Heterogeneous Mixture
No → Continue to Step 3
3
Physical Separation
Can components be isolated with physical tools (boiling, filtering, magnets)?
Separates → Homogeneous Mixture
Zero Residue → Pure Substance
Always cite which question gave you the deciding evidence! Claim + Evidence + Reasoning
Mystery Samples: Practice Analysis
Case Studies
Case Alpha Boiling Test
“A clear, colorless liquid boils steadily at exactly 100°C until 100% evaporated. Zero residue remains in the glass.”
Classification: Pure Substance (Water)
Evidence: Constant boiling point and zero residual components proves it is a single chemical species.
Case Beta Magnet Test
“A dark gray and tan powder. When a magnet passes over it, dark metallic flakes jump to the magnet, leaving tan sand behind.”
Classification: Mixture (Iron + Sand)
Evidence: Physical separation occurred using magnetic attraction without any chemical reaction.
Now test Samples A, B, C, & D on your worksheet! Remember to write your Reasoning sentence in full!
Lab Protocol: 4 Steps at Your Station
Hands-On Time
1
Luster Scan
Shine direct light on the sample dish. Check if grains sparkle or appear dull matte.
2
Pinch Touch
Gently roll a small pinch between fingertips. Note granular grit vs. silky powder.
3
Lens Geometry
Inspect with hand lens. Look for repeating cube shapes or diverse particle types.
4
Record & Claim
Fill Table 2 immediately with factual observations before classifying.
Lab Safety Rule: Never taste or inhale unknown powders. Keep hand lenses inside the tray border. Wash hands at the end!
Scientific Synthesis: Class Challenge
Exit Debrief
Common Misconception Alert
“If a mixture looks completely uniform to the naked eye (like clear saltwater), it must be a pure substance!”
Why is this false? Homogeneous mixtures (solutions) blend particles so thoroughly that eyes alone cannot resolve them. Testing physical separation (evaporating water leaves salt crystals) proves multiple substances exist!
Complete Part 4 synthesis question on Page 2 before leaving! Matter Mysteries Investigation Complete
