Grade 2 · unit review

Review: Matter Properties and Changes

Use properties and change descriptions to explain familiar materials.

Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. Which scientific label fits the specifically described step or feature? Supplied case: Strip bends and returns.
Need a hint?
  • Look for the described feature: bends without breaking in the supplied test.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
2. Which physical state is described? Supplied case: Juice takes the cup’s shape.
Need a hint?
  • Look for the described feature: flows and takes container shape.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
3. Which scientific label fits the specifically described step or feature? Supplied case: Frozen water warms into liquid.
Need a hint?
  • Look for the described feature: solid changes to liquid.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
4. Which scientific label fits the specifically described step or feature? Supplied case: A single joining tab.
Need a hint?
  • Look for the described feature: one separate building part.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Draw or write four parts for “Matter Properties and Changes”—one pretend example from each lesson. In each part, show what happened, give your answer, and say which clue helped you. If the question gives numbers, show your working too. Finish with one thing the practice case does not tell us. You may say your answers aloud.

Work on paper or in your own document. Explain the choices you made.

  • Choose one pretend example from each of the four lessons.
  • Name what each example shows.
  • If the example gives numbers, show your calculation and unit. Otherwise, say which clue explains your answer.
  • Say that the case details are supplied for practice; they are not your own real-life observations.
  • Say one thing the example does not tell us, or one change that could give a different answer.
Compare with a model response

Panel 1: Which scientific label fits the specifically described step or feature? Supplied case: Cloth bends around a corner. Result: flexible. Reasoning: The answer is flexible. In the notes, it means “bends without breaking in the supplied test.” A property describes a material, while an object also has a shape and purpose. Use printed property tests. Never taste, burn or heat a material for this activity. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 2: Which physical state is described? Supplied case: A stone holds its shape. Result: solid. Reasoning: The answer is solid. In the notes, it means “keeps its own shape in this record.” Solids keep a shape under ordinary conditions. Liquids flow and take a container’s shape while keeping volume approximately fixed. Gases spread through available space. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 3: Which scientific label fits the specifically described step or feature? Supplied case: Ice becomes liquid water. Result: melting. Reasoning: The answer is melting. In the notes, it means “solid changes to liquid.” Melting and freezing change state without changing the substance’s identity. Cutting changes shape. Some changes form new substances and cannot be simply reversed by restoring temperature. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 4: Which scientific label fits the specifically described step or feature? Supplied case: One paper rectangle. Result: component. Reasoning: The answer is component. In the notes, it means “one separate building part.” The same components can form different structures. Count what parts are used and describe their arrangement. Shape can change an object’s function without changing the material. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.