Hazardous Treasure Hunt Log Worksheet Confidential
Hazardous Treasure Hunt
Case No. 001: Household Chemicals
LOG DATE: ________/________/________
Mission Briefing
Welcome, Detective. Your kitchen and bathroom are filled with secret chemicals. Some are helpful, but some can be dangerous if handled incorrectly. Your mission is to examine the "suspect" containers provided and decode their hidden warnings.
Evidence Log
Product Name Primary Use Hazard Symbol? Danger Level (1-5) ① ② ③ ④ ⑤ ① ② ③ ④ ⑤ ① ② ③ ④ ⑤ ① ② ③ ④ ⑤ ① ② ③ ④ ⑤
Symbol Decoder
Flammable
Can catch fire easily.
Poisonous
Harmful if swallowed.
Corrosive
Can burn skin or eyes.
Detective's Notes
Why do you think some "food" products have hazard warnings (like "keep out of reach of children") while others don't?
Analysis Question
Look at your evidence. Which category of products (Cleaning, Food, or Beauty) seems to have the most "Corrosive" or "Flammable" symbols? Why do you think that is?
Hazardous Treasure Hunt Slides Confidential
Top Secret
Case File #001
Hazardous
Treasure Hunt
Investigating the secret chemistry hidden in your home.
DETECTIVE UNIT: CHEMISTRY
Are there dangerous chemicals hiding under your kitchen sink?
Investigation Required
The Mystery
Every day, we use products like shampoo, cleaner, and juice. But what's really inside those bottles?
Your Objective:
Examine product labels, find hazard symbols, and decode the safety warnings.
Decoding the Clues
Flammable
This substance catches fire easily! Keep away from heat and sparks.
Poisonous
Harmful or fatal if swallowed or inhaled. Never taste unknown chemicals.
Corrosive
Can burn skin or eyes. Acids and strong bases are often corrosive.
Detective Protocols
1
No Tasting: Never taste any chemical unless your lead detective (teacher) says it is food-grade.
2
Gentle Handling: Some containers may be fragile or have residue. Use caution.
3
Record Data: A detective is only as good as their notes. Use your Evidence Log!
Begin the Hunt
You have 15 minutes to examine the evidence samples at your station. Fill out your log for each one.
15:00
Investigation Clock
Hazardous Treasure Hunt Teacher Guide Teacher Facilitation Guide
Case File #001: Hazardous Treasure Hunt
5TH GRADE CHEMISTRY
Investigation Overview
Students take on the role of "Product Detectives" to uncover the chemistry hiding in plain sight. This introductory lesson focuses on identifying common household chemicals and decoding the safety symbols (Hazard Symbols) found on their labels.
Essential Question
"Are there dangerous chemicals hiding under your kitchen sink?"
Kit List
10-15 empty, clean containers
Shampoo, Window Cleaner, etc.
Food items (Vinegar, Soda)
Evidence Log Worksheets
Lesson Slide Deck
Pacing & Protocol
10 min
The Hook & Briefing
Display Slide 2. Ask students: "What do you think is inside these bottles?"
Discussion Prompt: "Why do you think companies put warnings on things like soap but not on apple juice?"
25 min
Evidence Collection
Students rotate through stations with product containers. They must locate the name, use, and any safety symbols.
Look-fors:
Are they reading the fine print for "active ingredients"?
Do they notice that some products have NO symbols?
Are they accurately identifying the "Corrosive" vs "Flammable" icons?
10 min
Debrief: The Patterns
Discuss the Analysis Question from the worksheet. Guide students toward noticing that cleaning products often contain harsher chemicals.
Support / ELL
Provide a "Picture Dictionary" of common ingredients (e.g., Sodium Laureth Sulfate = Soap). Focus heavily on visual symbols before reading the text-heavy labels. Pair with a fluent reader for label decoding.
Extension
Challenge students to find the scientific name of the ingredients and research what they are made of. Have them compare two different brands of the same product type (e.g., "Natural" vs. "Heavy Duty" cleaner).
Safety Protocol: Ensure all containers are thoroughly rinsed and dried. If original labels are missing, tape a new label on or do not use the container. Do not use bleach or ammonia containers for this introductory lesson.
Taste of Chemistry Worksheet Sensory Test
Taste of Chemistry
Case No. 002: Flavor Profiles
LOG DATE: ________/________/________
Clue 1: Acids
Acids are chemical compounds that often taste SOUR. Think of a lemon or a green apple. In science, we measure acidity using the pH scale.
Clue 2: Bases
Bases (alkaline) often taste BITTER or feel slippery. Think of baking soda or plain cocoa powder. Most safe food-bases are used in baking!
The Sensory Lab
Instructions: Small sips only! Describe the flavor, then guess if it's an Acid or a Base.
Sample ID Flavor Description Prediction Sample A: (Diluted Lemon Juice) Acid Base Sample B: (Baking Soda Water) Acid Base Sample C: (Tonic Water) Acid Base Sample D: (Grapefruit Juice) Acid Base
The Culinary Connection
Why do you think chefs add acid (like lemon or vinegar) to meat marinades or heavy cream? How does the "pucker" feeling change the food?
Taste of Chemistry Slides Case File #002
Taste of
Chemistry
Why do sour candies make your face pucker?
The "Pucker" Factor
When you bite into a lemon, your mouth reacts instantly. That sharp, zingy feeling is the signature of an Acid.
Scientific Secret:
Your tongue is actually a biological chemistry sensor!
Acid Detected
Acids
Taste SOUR
Used to tenderize meat
Examples: Vinegar, Lemon, Soda
pH Scale: 0 to 6
Bases
Taste BITTER
Feel slippery/soapy
Examples: Baking soda, Cocoa
pH Scale: 8 to 14
The pH Scale
ACID NEUTRAL (7) BASE
"pH" stands for "potential Hydrogen" - it tells us how many hydrogen ions are active in the solution.
The Tasting Lab
SMALL SIPS
You only need a tiny drop to trigger your taste buds.
DESCRIBE
Don't just say "yuck." Use words like sharp, zingy, or earthy.
PREDICT
Is it an Acid (Sour) or a Base (Bitter)?
Taste of Chemistry Teacher Guide Teacher Facilitation Guide
Case File #002: Taste of Chemistry
pH & SENSORY SCIENCE
Investigation Overview
This lesson connects the abstract concept of pH to the physical sense of taste. Students will taste diluted food-grade samples to identify the "Zing" of acids and the "Earthiness/Bitterness" of bases. This builds the foundational understanding that pH is a measurable property that affects the world around us.
Teacher Note
"Ensure all materials used in this specific lesson are food-grade and safe for ingestion. This is the ONLY lesson where tasting is permitted."
Grocery List
Lemon juice (diluted 1:4)
Baking soda (1 tsp in 1 cup water)
Tonic water (contains quinine - bitter)
Grapefruit juice
Small paper cups & napkins
Pacing & Protocol
10 min
The Pucker Introduction
Display Slide 2. Discuss the physical sensation of sourness. Explain that sour = Acid and bitter = Base.
"Why do we like sour candy but hate the taste of soap? Both are chemical signals to our brain!"
25 min
The Tasting Lab
Distribute the four samples. Students should take tiny sips, rinsing with water between each sample. They record their findings in the Tasting Worksheet.
Key Observations:
Sample A (Lemon): Sharp, tart, immediate pucker (Acid).
Sample B (Baking Soda): Chalky, flat, soapy feeling (Base).
Sample C (Tonic Water): Distinctly bitter (Base/Quinine).
Sample D (Grapefruit): Both sour and bitter elements (Complex Acid).
10 min
The pH Scale Reveal
Show Slide 3. Place their samples on a conceptual pH scale. Explain that stronger acids are even sourer (but dangerous) and stronger bases are even more bitter (and also dangerous).
Support
Focus on identifying just one characteristic per sample. Use a simplified 3-point pH scale: Very Acidic, Neutral, Very Basic.
Extension
Research "Antacids." Why do we take a base (like Tums) when we have an upset (acidic) stomach? Introduce the concept of Neutralization.
Allergy Check: Verify all students for citrus or quinine allergies before beginning the tasting lab.
Stain Solver Lab Report Laboratory Test
Stain Solver Lab
Case No. 003: Cleaning Efficacy
LAB DATE: ________/________/________
The Problem
"Some dirt is greasy (like oil), while some dirt is crusty (like hard water stains). Do acids and bases work the same on every stain? Or are some cleaners better at specific jobs?"
Hypothesis: Grease
Which will clean grease better?
Acid (Vinegar) Base (Baking Soda)
Hypothesis: Minerals
Which will clean hard crust better?
Acid (Vinegar) Base (Baking Soda)
Evidence Collection
Record what happens when you scrub each stain with 5 swipes of the cleaner.
Stain Type Cleaner 1: Vinegar (Acid) Cleaner 2: Baking Soda (Base) Greasy Stain (Vegetable Oil + Crayon) Mineral Crust (Hard Water Marks / Chalk)
Scientific Analysis
1. Which cleaner was the "Champion" of the Greasy Stain?
2. Why do you think we use vinegar to clean shiny surfaces like windows or chrome faucets?
3. CONCLUSION: Different jobs need different pH levels. Explain why.
Stain Solver Lab Slides Case File #003
Stain Solver
Lab
Investigating which pH level wins the fight against dirt.
The Clean Team
Why do we use vinegar to clean glass, but soap (a base) to clean greasy dishes?
The Detective's Secret:
Different types of "dirt" have different chemical bonds. To break them, you need the right tool!
ACIDS
Destroy mineral deposits and rust.
BASES
Break down fats, oils, and proteins.
Laboratory Protocol
1
Apply
Place a small amount of Vinegar (Acid) or Baking Soda Water (Base) onto the stain.
2
React
Let it sit for 1 minute. Observe if it fizzes, bubbles, or starts to dissolve.
3
Scrub
Use exactly 5 swipes with your sponge. Which one removed more?
Why It
Matters
If you use the wrong cleaner, you might just move the dirt around or even damage the surface!
Did you know?
Mixing an acid and a base can sometimes cancel both out (Neutralization)—but mixing some cleaners can be deadly!
Safety First
Always wear your "detective goggles" (safety glasses) when working with cleaning chemicals.
Stain Solver Lab Teacher Guide Teacher Facilitation Guide
Case File #003: Stain Solver Lab
CHEMISTRY OF CLEANING
Investigation Overview
Students conduct a comparative experiment to determine if the pH of a cleaner affects its ability to remove different types of stains. By testing a weak acid (vinegar) and a weak base (baking soda solution) on "greasy" vs. "mineral" stains, they discover that chemical properties dictate practical usage.
Scientific Concept
"Acids react with carbonate-based minerals (dissolving them), while bases emulsify fats and oils (making them easier to wash away)."
Lab Setup
STAIN SAMPLES:
1. Grease: Oil mixed with crayon on a tile
2. Mineral: Chalk paste dried on a tile
CLEANERS:
White vinegar (in dropper bottles)
Baking soda water (1:5 ratio)
TOOLS:
Small sponges or paper towels
Pacing & Protocol
10 min
Hypothesis Formation
Display Slide 2. Ask: "Which chemical (Acid or Base) is better for which job?" Have students fill in their hypotheses on the lab report.
30 min
Active Lab: Scrub Test
Students apply the cleaners and count their scrubs. Remind them to keep the number of scrubs constant (5 swipes) for a fair test.
Expected Results: Vinegar will dissolve the chalky mineral crust (Acid + Carbonate = Fizz/CO2). Baking soda water will lift the greasy oil/crayon better than plain vinegar.
10 min
Analysis & Discussion
Review the findings. Discuss why "all-purpose" cleaners might actually be bases (for grease) and why we use specialized "lime/rust" removers (acids) for bathrooms.
Safety Note
"Do not allow students to mix vinegar and baking soda directly on the tiles unless you want a mess! While safe, it produces CO2 gas and can spray the 'dirt' elsewhere."
Extension
"Have students test the pH of their cleaners using litmus paper or red cabbage juice indicator before starting the cleaning test."
The Pickle Mystery Worksheet Preservation File
The Pickle Mystery
Case No. 004: Biology & pH
OBSERVATION DATE: ________/________/________
The Case Brief
A fresh cucumber will rot in a matter of days if left out. However, a pickle can stay fresh in a jar for over a year! Your mission is to find out how acidity acts as a biological shield against bacteria.
Bacteria Warning
Most bacteria hate acidic environments!
Investigation Log
Sample Jar Initial Appearance (Day 1) Final Observation (Day 3+) Jar 1: Plain Water (pH ~ 7.0) Jar 2: Vinegar Solution (pH ~ 3.0)
The pH Shield Analysis
1. In which jar did the cucumber start to change color or smell "funny" first?
2. Scientists say bacteria "can't thrive" in acidic environments. What does that mean for our food?
3. THE MYSTERY SOLVED: Why do people "pickle" food during the winter? How does pH help us survive?
Evidence Item #004-B: Acidity = Safety
The Pickle Mystery Slides Case File #004
The Pickle
Mystery
How chemistry keeps our food from fighting back.
Nature's Defense
How can a cucumber stay "fresh" for over a year inside a jar?
The Secret Weapon:
Acidity!
Bacteria are like tiny detectives too—but they can't handle a high-acid environment.
pH 3.0
No Entry!
How It Works
The Rot (Neutral)
Bacteria love pH 7 (Neutral). In water, they multiply quickly, turning the cucumber into mush.
The Shield (Acid)
Vinegar has a pH of 2-3. This acidity destroys the enzymes bacteria need to survive.
The History of Science
"Pickling wasn't just for snacks—it was for survival!"
Before refrigerators, acid was our best preservative.
Sailors used pickled foods to prevent scurvy (Vitamin C is an acid too!).
Different cultures use different acids: Vinegar (Europe), Lactic Acid (Kimchi/Kraut).
Case Closed
The Pickle Mystery Teacher Guide Teacher Facilitation Guide
Case File #004: The Pickle Mystery
pH & PRESERVATION
Investigation Overview
This lesson shifts the focus from chemical cleaning to biological interaction. Students observe how pH affects the rate of decomposition (or preservation) of organic matter. By comparing cucumbers in neutral water vs. acidic vinegar, they learn that acidity is a powerful tool for inhibiting bacterial growth.
Biological Hook
"Bacteria are living organisms that require specific environments to survive. Most 'bad' bacteria cannot survive below a pH of 4.6."
Lab Setup
PRE-PREPARED SAMPLES:
(Set these up 2-3 days before lesson)
1. Control: Cucumber in tap water
2. Test: Cucumber in white vinegar
DURING LESSON:
Fresh cucumbers (slices)
Small jars or clear cups
Litmus paper or pH test strips
Pacing & Protocol
10 min
The Scurvy & Sailors Hook
Display Slide 4. Discuss how sailors used pickling to survive long voyages. Ask: "Why didn't the food rot on the ship?"
25 min
Evidence Observation
Students examine the pre-prepared jars (Control vs. Test). They look for: Color change, texture (mushy vs. firm), and odor (warning: open carefully!).
Key Discussion: "The cucumber in water is starting to break down because bacteria are eating it. The vinegar cucumber is preserved because it's too acidic for the bacteria to work."
15 min
pH Testing
Students test the pH of both liquids. They record the specific numbers on their worksheet. Reinforce that lower numbers = more acid.
Safety Note
"Do not allow students to taste the 'Control' (water) sample, as it may have high bacterial growth. Dispose of the water samples carefully after the lesson."
Extension
"Discuss 'Botulism' (rare but dangerous). Why is it important to follow exact canning recipes when using vinegar? Link to the idea of a 'critical pH' for safety."
Safety Squad Project Slides Final Mission: Case File #005
Safety Squad
Project
Time to share your detective skills with the world.
Master Detective
You've decoded hazard symbols, tasted food chemistry, solved cleaning mysteries, and uncovered preservation secrets.
Your Final Task:
Create a Consumer Safety Guide to teach your family how to handle household chemistry safely.
EXPLAIN
Acid vs Base
WARN
Mixing Risks
PROTECT
Safety Symbols
UTILIZE
Cleaning & Food
The Ultimate Warning
NEVER MIX BLEACH & AMMONIA
"Mixing a strong base (Bleach) with certain cleaners (Ammonia) creates a chemical reaction that releases toxic gas. This is why chemical literacy saves lives!"
Chloramine Gas
Dangerous Fumes
Severe Harm
Safety Squad Checklist
Title & Catchy Hook
pH Scale Diagram
Hazard Symbol Key
3 "Pro-Tips" for Safety
Earn Your Badge
A true detective protects their community!
Safety Squad Project Guide Teacher Project Guide
Case File #005: Safety Squad Project
SUMMATIVE ASSESSMENT
Project Goal
Students will synthesize their knowledge of pH, household chemistry, and consumer safety into a single, cohesive educational product. The "Home Safety Guide" serves as a summative assessment of their understanding of how chemical properties impact daily life and safety.
Project Requirements
Hazard Symbol Key: Must include and explain at least 3 symbols (Flammable, Corrosive, etc.)The pH Scale: A visual diagram showing where common household items sit.Mixing Warning: A clear, bold warning about mixing cleaners (Bleach + Ammonia).Real-World Tips: At least 3 tips for safe storage or usage.
Assessment Rubric
Category Weight Scientific Accuracy (pH/Symbols) 40% Clarity of Safety Warnings 30% Creativity & Design 20% Presentation/Organization 10%
Facilitation Strategy
1
Concept Map (15 min)
Have students list all the chemicals they've learned about. Categorize them into "Acidic" and "Basic" as a class before they start their individual guides.
2
Drafting (30 min)
Distribute the Brochure Template. Students should focus on the "Big Warning" first to ensure the most important message is clear.
3
Detective Peer Review (15 min)
Students swap guides with a partner. Partners check for: "Does this symbol make sense?" and "Is the pH scale accurate?"
Scientific Background for Teacher
BLEACH (Sodium Hypochlorite) + AMMONIA = Chloramine gas. BLEACH + ACID (Vinegar) = Chlorine gas. Both are extremely toxic when inhaled. In 5th grade, focusing on the Bleach + Ammonia rule is the most critical real-world safety takeaway for home products.
Safety Squad Project Template Home Safety Guide: Blueprint
Master Detective Project Template
Project ID: CASE-005-BLUEPRINT
DETECTIVE: ________________________
Step 1: The Hook
Create a title that will make your family want to read your guide!
My Amazing Chemical Safety Guide...
Pro Tip: Use words like "Shield," "Hero," or "Expert"!
Step 2: The pH Scale Map
Draw a line and place these 4 items where they belong: Vinegar, Water, Baking Soda, Bleach.
ACIDIC (0) NEUTRAL (7) BASIC (14)
01234567891011121314
Step 3: Symbol Key
Pick 2 symbols and explain them in "Kid-Friendly" language.
Step 4: The BIG WARNING
What is the most dangerous mixture in the house? Write it BIG and BOLD here.
WRITE YOUR WARNING HERE
Step 5: Top 3 Safety Pro-Tips
1
2
3
