United States · 10–11 yearsMixing or a new substance?Distinguish retained materials, possible new substances and conclusions needing more evidence.One screen. The whole class.
Matter, particles and change
Matter, particles and change: Particles explain matter → Weight before and after → Identify from properties → Mixing or a new substance? → Plan a safe comparison.
Learning goals
- Use simple particle models to explain observable properties, including gases.
- Interpret measurements showing conservation in a closed system during mixing/change.
- Use multiple observations/tests to identify a material.
- Use supplied evidence to distinguish possible chemical change from mixing; evidence has limits.
- Choose controlled measurements and a defensible conclusion without conducting hazardous experiments.
A suggested order, with freedom to open or replay any available activity. Played activities help teachers continue a sequence; they do not measure mastery.
Open this path in the classroomBefore you begin
- Grade4 energy transfer, structures, waves and Earth processes.
One computer and a whiteboard or shared display. Pupils participate without accounts. The teacher sets the pace and can repeat or skip each activity.
Particles explain matter · Free
Use simple particle models to explain observable properties, including gases.
Weight before and after · Free
Interpret measurements showing conservation in a closed system during mixing/change.
Identify from properties · Free
Use multiple observations/tests to identify a material.
Mixing or a new substance? · Free
Use supplied evidence to distinguish possible chemical change from mixing; evidence has limits.
Plan a safe comparison · Free
Choose controlled measurements and a defensible conclusion without conducting hazardous experiments.
United States · 10–11 yearsMixing or a new substance?Distinguish retained materials, possible new substances and conclusions needing more evidence.
United States · 10–11 yearsIdentify from propertiesCombine test signatures, choose useful evidence and keep uncertain identifications open.
United States · 10–11 yearsPlan a safe comparisonChoose clear measurements, controlled comparisons and conclusions the evidence can support.
United States · 10–11 yearsWeight before and afterFollow every part of a measured system through mixing and changes of form.
United States · 10–11 yearsParticles explain matterUse visible observations to test explanations about matter too small to see.