Indigenous definition, sampling data to analyse and experiment to plan PIO - Calculating resistance, voltage & energy, series and parallel circuits

🌿 1. Indigenous Definition

  • Indigenous people = groups who have historical ties to a region, often living there before colonisation or modern settlement

  • Key points:

    • Maintain cultural traditions and languages

    • Have a close relationship with the land and environment

📊 2. Sampling Data to Analyse & Experiment Planning (PIO)

🔹 PIO – Planning, Implementing, Observing

  1. Planning

    • Identify aim or research question

    • Choose variables:

      • Independent variable (IV): what you change

      • Dependent variable (DV): what you measure

      • Control variables: what you keep the same

    • Decide sample size & sampling method (random, systematic, stratified)

  2. Implementing

    • Carry out experiment safely

    • Record data carefully

  3. Observing / Analysing

    • Organise data into tables, graphs, or charts

    • Look for trends, averages, anomalies

    • Draw conclusions

Example:

  • Investigate plant growth in different soil types

    • IV = soil type, DV = plant height, Control = water, light, pot size

    • Sample size = 5 plants per soil type

    • Repeat to calculate mean growth

⚡ 3. Calculating Resistance, Voltage & Energy

🔹 Ohm’s Law

V=I×RV = I \times RV=I×R

  • VVV = voltage (V)

  • III = current (A)

  • RRR = resistance (Ω)

🔹 Electrical Energy

E=V×I×tE = V \times I \times tE=V×I×t

  • EEE = energy (J)

  • VVV = voltage (V)

  • III = current (A)

  • ttt = time (s)

🔹 Series and Parallel Circuits

Feature

Series

Parallel

Voltage

Shared across components

Same across all branches

Current

Same throughout

Divides across branches

Resistance

R_total = R1 + R2 + …

1/R_total = 1/R1 + 1/R2 + …

If one component fails

Whole circuit stops

Other branches still work

Key Tip:

  • Series → voltage divides, current same

  • Parallel → voltage same, current divides

🔗 Big Links

  • PIO framework → ensures systematic data collection

  • Ohm’s Law → links resistance, voltage, current

  • Energy formula → links voltage, current, time

  • Series vs parallel → determines how voltage and current behave

⭐ Exam Tips

  • Always label units: V, A, Ω, J

  • For PIO:

    • Identify IV, DV, control variables

    • Include sample size

  • For circuits:

    • Draw clear diagrams

    • Check series vs parallel differences