MISSION 12 · CHEMISTRY DISCOVERY
Choose one question and show another scientist how to repeat your test.
4 · Your Own Investigation
Your new skill: Design and repeat one safe comparison using earlier methods.
Revisit the skill you will reuse: Previous main-path mission
Match the names to your parts before you build. New parts appear when you first need them. You can point, say the name or show a grown-up.
A ruler measures distance. A timer measures elapsed time. Your paper records a prediction and result so you can compare tests.
Look for: Find the cm marks or the timer display and a place to draw or write.
Before using it: Use the same start point and method each time. You can say, point or draw your evidence instead of writing long answers.
Your turn: Choose the mark where the first measurement will begin.
A video demonstration will appear here when it is ready. You can follow the written step now.
Before we build, match these names to the parts in front of you. Ruler timer and evidence sheet. A ruler measures distance. A timer measures elapsed time. Your paper records a prediction and result so you can compare tests. Find the cm marks or the timer display and a place to draw or write. Use the same start point and method each time. You can say, point or draw your evidence instead of writing long answers. Pause and point to the part that will do the main job in this mission. If it is missing or looks different, ask a grown-up before building.
WHAT YOU'LL USE
Kit list: match the named parts to your box and its component cards. Home list: gather these before starting; some may also be supplied in your kit. Reuse components between missions. Stop and ask a grown-up if an essential part or label is missing.
BEFORE YOU BUILD
An adult supervises. Wear the kit goggles. Keep experiment tools away from food, eyes and mouths. Use only the named materials and amounts. Never taste or deliberately smell samples. Keep containers open. Wash hands after cleanup.
YOUR REWARD
PREDICT BEFORE YOU BEGIN
Before you start, predict the result and say why. It is fine if your prediction changes after the test.
YOUR CHALLENGE
NEW POWER-UP
Design and repeat one safe comparison using earlier methods.
You have just practised separate particles while distinguishing filtration from purification. Now: design and repeat one safe comparison using earlier methods.
BUILD PATH
STEP 1 OF 6
Choose one completed water mission: the water dome, soap-push test, tissue crawl or filter. Pick one change that used only the listed materials. No new chemicals, heat, sealed containers or larger reactions.
A video demonstration will appear here when it is ready. You can follow the written step now.
Choose one completed water mission: the water dome, soap-push test, tissue crawl or filter. Pick one change that used only the listed materials. No new chemicals, heat, sealed containers or larger reactions.
WHAT'S REALLY HAPPENING?
An investigation is a repeatable comparison that connects a question to evidence. An unexpected result is useful information; one trial is not proof of a general rule.
FAIR-TEST CHALLENGE
Change one feature, keep the rest the same and repeat your comparison.
NEXT SKILL
You have reached the end of the main path. Share what you made, then choose an optional challenge.