6–8 Science: Mini-Labs & Quick Demos

Each: Materials → Steps → Notice/Record → Targets misconception

1) Syringe Compression (Particle Model)
Materials: 10 mL syringe (no needle), modeling clay.
Steps: Seal tip; pull/push plunger.
Notice: Volume changes, mass/number of particles doesn’t; spacing changes.
Targets: “Particles shrink” → No, spacing changes.

2) Density Stack
Materials: Honey, water (colored), oil; small beads/grapes.
Steps: Layer liquids slowly; drop items.
Notice: Order by density; objects float/sink at matching layer.
Targets: “Heavier objects sink” → Density rules.

3) Mass vs Weight
Materials: Spring scale, 1 kg mass, meter stick.
Steps: Measure force (N) on Earth; discuss Moon ggg.
Notice: Mass stays 1 kg; weight W=mgW=mgW=mg would change.
Targets: Mass=weight confusion.

4) Constant Speed ≠ Net Force
Materials: Cart, motion track, force sensor or spring scale.
Steps: Push to steady speed; stop pushing.
Notice: Balanced push–friction at steady vvv; then friction slows cart.
Targets: “Motion needs force” → Only change in motion needs net force.

5) Friction Ramp
Materials: Ramp, different surfaces, same block, force gauge.
Steps: Pull block at constant speed on each surface.
Notice: Different friction forces; relate to micro-texture.
Targets: “Friction is same everywhere.”

6) Energy Bar Chart (Pendulum or Rubber Band)
Materials: String + washer (pendulum) or rubber band + toy car.
Steps: Release from height / stretch-release.
Notice: GPE → KE → thermal/sound at end.
Targets: “Energy used up” → transformed.

7) Wave Speed & Frequency (Slinky)
Materials: Slinky/rope, tape marks.
Steps: Make waves; count crests/sec; measure wavelength.
Notice: If medium fixed, v=fλv=f\lambdav=fλ (change fff, λ adjusts).
Targets: Mixing up f,λf,\lambdaf,λ; amplitude ≠ speed.

8) Mirror Law with Protractor
Materials: Plane mirror, protractor, ray box/laser pointer (careful).
Steps: Measure incidence/reflection angles.
Notice: ∠i=∠r\angle i=\angle r∠i=∠r; normal line matters.
Targets: Free-hand ray guessing; ignoring normal.

9) Basic Circuit Series vs Parallel
Materials: Battery, 2 bulbs, wires, switch.
Steps: Build series → observe brightness; build parallel → compare.
Notice: Series: dimmer & one path; Parallel: each gets full VVV.
Targets: “Current used up by first bulb.”

10) Photosynthesis/Respiration Concept Demo
Materials: Clear bottle, small aquatic plant (Elodea), BTB indicator (if available) / or yeast + balloon.
Steps: Light vs dark bottles (plant) or warm sugar water + yeast.
Notice: CO₂ use/production; gas in balloon (CO₂).
Targets: “Plants only respire at night”; confusing processes.

11) Natural Selection Paper Moths
Materials: Speckled & plain paper “moths,” two backgrounds, timer.
Steps: “Predators” pick moths for 30 s on each background.
Notice: Frequency shift toward better-camouflaged type.
Targets: “Need causes evolution” → selection on variation.

12) Seasons: Tilt, Not Distance
Materials: Lamp (Sun), globe tilted 23.5°.
Steps: Keep distance constant; orbit the globe.
Notice: Angle/day-length change explains seasons.
Targets: “Summer = closer to Sun.”

13) Convection in a Jar
Materials: Clear jar, warm water bottom, cold water top, food coloring.
Steps: Add color to warm region; watch flow.
Notice: Warm fluid rises, cold sinks (density change).
Targets: “Heat rises” (it’s warm fluid that rises).

14) Graph It Right
Materials: Sample dataset, graph paper/rulers.
Steps: Choose variables; set scale; plot; title/axes/units/legend.
Notice: How scale choice changes readability.
Targets: Missing axes/units/scale.