Explain the root–stem–leaf water pathway and use dye evidence to identify internal transport in a cut shoot.
Trace a route.
Use a marker to test part of it.
Success looks like
Trace soil water through roots and stem to leaves.
Explain what coloured internal pathways support.
State a limit of a rootless demonstration.
Retrieval
BUILD · SCIENCE · Lesson 6 of 7
Retrieve the connected parts
1. Which part takes in soil water?
2. Which part connects roots and leaves?
3. Does water usually enter as solid soil?
I do
BUILD · SCIENCE · Lesson 6 of 7
I trace the rooted-plant route
Soil → roots → stem → leaves.
Water moves through internal pathways.
Water travels through internal pathwaysDiagram description
Selected water path in a rooted plant: soil water enters roots, travels upward in xylem through the stem, reaches leaves, and some leaves as water vapour. Arrows do not imply that all absorbed water is lost or that root uptake was demonstrated by a cut shoot.
I do
BUILD · SCIENCE · Lesson 6 of 7
I mark water in a cut shoot
Colour helps us follow movement.
A plain-water shoot is the comparison.
This setup has no roots.
Follow a visible tracerDiagram description
Two cut flower shoots stand in separate cups, one with coloured water and one with plain water. Dye can mark internal water routes in the shoot; neither shoot has roots. The plain-water cup is a comparison.
Continue within this stage’s shared time.
I do
BUILD · SCIENCE · Lesson 6 of 7
I inspect the interior evidence
Colour appears in internal paths.
Not all tissue is coloured equally.
Inspect inside, not just outsideDiagram description
Simplified adult-prepared stem cross-sections from the dye and plain-water comparison. Coloured spots represent selected stained water-carrying bundles, not uniform colouring of every tissue. Positions are illustrative and not a precise anatomy atlas.
Constructed observations; timings vary in real demonstrations
Stage
Dye shoot
Plain-water comparison
Start
Placed in coloured water
Placed in plain water
Later
Internal red paths; then some red petals
No red dye colour
Trace, test and limit the water claim
Use the rooted model and constructed cut-shoot records. Reveal each diagram after a prediction; timings are not a live experiment.
Decision 1 of 3
In a rooted plant, which route fits soil water reaching a leaf?
Water travels through internal pathways
Some water is retained or used; some leaves the plant as vapour.
Decision 2 of 3
Colour appears inside an adult-cut stem section. Which account fits?
Inspect inside, not just outside
Compare the dye shoot with the plain-water shoot before claiming a dye effect.
Decision 3 of 3
Can the rootless cut-shoot experiment demonstrate root absorption directly?
Follow a visible tracer
It supports transport in the shoot above the cut; root uptake is explained with the separate rooted-plant model.
All decisions checked. Explain one choice using the evidence, then save your work.
Choose, test, then explain together. Evidence diagrams appear only after your test. Diagram transitions explain the model; they do not represent real elapsed time. Use Pause model to stop transitions and model controls, or your device’s reduced-motion setting. The printed We do activity provides the paper route.
We do
BUILD · SCIENCE · Lesson 6 of 7
Which claim reaches too far?
“Water moved within this cut shoot.”
“We proved how roots took up water.”
Use B to choose.
Explain the demonstrated part of the route and state what was not tested.
Hinge
BUILD · SCIENCE · Lesson 6 of 7
What does an internal red path support?
Focus on evidence inside the shoot.
You do
BUILD · SCIENCE · Lesson 6 of 7
Choose your science route
Complete the route and clues.
Write a transport explanation.
Challenge the overclaim.
You do
BUILD · SCIENCE · Lesson 6 of 7
Make your own evidence record
Use the shared evidence.
Explain one choice.
Check a label or number.
You do
BUILD · SCIENCE · Lesson 6 of 7
Check what the evidence can show
Point to the clue you used.
Remove an unsupported claim.
Continue within this stage’s shared time.
Review
BUILD · SCIENCE · Lesson 6 of 7
Lundy loop: improve the shared account
Choose how to share.
Hear one evidence-based challenge.
Improve or defend one idea.
Which limit made the explanation more trustworthy?
The rootless shoot supports internal transport, while the full root pathway is a separate scientific model.
Review
BUILD · SCIENCE · Lesson 6 of 7
Keep the useful change
What changed in our account?
Which evidence helped?
The rootless shoot supports internal transport, while the full root pathway is a separate scientific model.
Continue within this stage’s shared time.
Exit
BUILD · SCIENCE · Lesson 6 of 7
Three final checks
E1. Which part takes in water from soil?
E2. Does water travel through internal stem pathways?
E3. Did the cut-shoot experiment contain roots?
Slide 1
BUILD SCIENCE · The water-path detectives
Shared evidence • The water-path case file
Records C–F are constructed teaching observations. Real dye timing varies; use the evidence supplied today.
A • Rooted-plant model
Soil water enters roots, then travels inside the stem to leaves. Some water leaves as vapour.
B • Setup
Two similar cut white-flower shoots: one in red-coloured water, one in plain water. Neither has roots.
C • After 2 hours
Constructed observation: red lines appear inside the dye shoot’s adult-cut stem section.
D • After 24 hours
Constructed observation: some petals show red colour. Exact timing varies in real plants.
E • Plain-water comparison
Constructed observation: no red dye colour in the control stem or petals.
F • Water-level check
A separate open cup without a plant also loses some water. Evaporation is possible.
W1. Put setup, internal colour and petal colour in order.
W2. Which part of the full rooted-plant route was not tested by B?