My collection
A game to share, a class to inspire

Plan a safe comparison

EnglishGrade 5ScienceFree

Choose clear measurements, controlled comparisons and conclusions the evidence can support.

What it is about

Choose controlled measurements and a defensible conclusion without conducting hazardous experiments.

Grade 5 · 10–11 years · 30 challenges

Before you begin

  • Grade4 energy transfer, structures, waves and Earth processes.

What the class will do

  1. Choose and explain · 30 challenges

    Plan a safe comparison

    Choose controlled measurements and a defensible conclusion without conducting hazardous experiments.

Using it in class

Everyone cites a test result and proposes a reason before the rotating representative acts. These are supplied illustrative records, not experiment instructions. No tasting or direct smelling of unknowns. Use limitations in discussion. Full bank: 25–40 minutes.

Give everyone time to think and discuss before one pupil acts at the board. The class explains and confirms together; hints and explanations stay until you move on.

Use an up-to-date browser on a computer connected to a whiteboard or shared display. Touch, mouse and keyboard; optional audio and reduced motion. No pupil accounts or personal devices.

Choose from 5 challenges up to the full activity. Discussion determines the duration: you set the pace.

A look inside the activities

Choose and explain

To compare two powders in water, which plan best isolates powder type?

  • Different powder amounts and temperatures for each type
  • One powder stirred while the other is left untouched
  • Equal powder amounts, water amounts, temperature and stirring method
Explanation and discussion

A focused comparison varies powder type while controlling relevant quantities and conditions. Multiple method differences make outcomes harder to attribute.

Which details belong in the written method?

Choose and explain

To compare materials’ conductivity, which plan gives useful supplied evidence?

  • Use a working tester for A and a known broken one for B
  • Infer conductivity only from whether each sample looks shiny
  • Use the same checked tester and method for each sample
Explanation and discussion

A checked, consistent tester lets sample results be compared. A faulty method or shine-only inference does not establish conductivity.

What known reference would help check the tester?

Choose and explain

Which final comparison report is most defensible?

  • State the question, controlled method, complete evidence and bounded conclusion
  • Give a certain universal claim from one incomplete trial
  • List an answer without the observations used to support it
Explanation and discussion

A sound report makes its reasoning inspectable. Complete evidence, controlled conditions and stated limits support a conclusion without claiming that a game replaces practical investigation.

What practical skill would still need teacher observation outside this game?

Explore more games like this

Explore this subject in the library →
Weight before and afterGrade 5 · FreeInterpret measurements showing conservation in a closed system during mixing/change.Mixing or a new substance?Grade 5 · FreeUse supplied evidence to distinguish possible chemical change from mixing; evidence has limits.Identify from propertiesGrade 5 · FreeUse multiple observations/tests to identify a material.