Physical Properties & Physical Changes — Drills · Grade 6 Science
Chapter: Matter, Mixtures & Water PropertiesWhat these drills covers
By the end of Physical Properties & Physical Changes you should be able to:
- I can measure density and use it to compare two materials.
- I can decide whether a change is physical by asking what substance is present afterwards.
- I can explain why a single property cannot identify an unknown material.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: physical property, density, evidence, system boundary, uncertainty.
Problem 1
- The largest sample must have the greatest density.
- Every change that is hard to reverse must be chemical.
- physical property: A characteristic measured or observed without changing chemical identity.
- A sample with missing measurements has proved those values are zero.
Answer and explanation
physical property: A characteristic measured or observed without changing chemical identity.
A characteristic measured or observed without changing chemical identity.
Problem 2
- Repeating any method makes every causal claim true.
- The largest sample must have the greatest density.
- Every change that is hard to reverse must be chemical.
- density: Mass per unit volume under stated conditions.
Answer and explanation
density: Mass per unit volume under stated conditions.
Mass per unit volume under stated conditions.
Problem 3
Answer and explanation
60 ÷ 20 = 3 g/cm³; size changed but the ratio stayed the same.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 4
Answer and explanation
It distinguishes possibilities that the first property cannot separate; the conclusion should still match the available evidence.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.