Clarification Statement - S.2.PS.1.1.CS:
Observations could include color, texture, hardness, and flexibility. Patterns could include the similar properties that different materials share.

Science and Engineering Practices - PK2.SEP3.3:
Plan and conduct investigations collaboratively to produce data to serve as the basis for evidence to answer a question

Disciplinary Core Ideas - S.2.PS.1.1.DCI:
PS1.A: Structure and Properties of Matter •Different kinds of matter exist and many of them can be either solid or liquid, depending on temperature. Matter can be described and classified by its observable properties.

Crosscutting Concepts - CC1.1:
Patterns in the natural and human designed world can be observed and used as evidence.

Clarification Statement - S.2.PS.1.2.CS:
Examples of properties could include, strength, flexibility, hardness, texture, and absorbency.

Assessment Boundary - S.2.PS.1.2.AB:
Assessment of quantitative measurements is limited to length.

Science and Engineering Practices - PK2.SEP4.3:
Analyze data from tests of an object or tool to determine if it works as intended.

Disciplinary Core Ideas - S.2.PS.1.2.DCI:
PS1.A: Structure and Properties of Matter •Different properties are suited to different purposes.

Crosscutting Concepts - CC2.1:
Simple tests can be designed to gather evidence to support or refute student ideas about causes.

Clarification Statement - S.2.PS.1.3.CS:
Examples of pieces could include blocks, building bricks, or other assorted small objects

Science and Engineering Practices - PK2.SEP6.1:
Make observations (firsthand or from media) to construct an evidence-based account for natural phenomena.

Disciplinary Core Ideas - S.2.PS.1.3.DCI:
PS1.A: Structure and Properties of Matter •Different properties are suited to different purposes. •A great variety of objects can be built up from a small set of pieces.

Crosscutting Concepts - CC5.1:
Objects may break into smaller pieces and be put together into larger pieces, or change shapes.

Clarification Statement - S.2.PS.1.4.CS:
An example of a reversible change could include freezing and melting. An example of an irreversible change could include cooking an egg.

Science and Engineering Practices - PK2.SEP7.1:
Construct an argument with evidence to support a claim.

Disciplinary Core Ideas - S.2.PS.1.4.DCI:
PS1.B: Chemical Reactions •Heating or cooling a substance may cause changes that can be observed. Sometimes these changes are reversible, and sometimes they are not.

Crosscutting Concepts - CC2.2:
Events have causes that generate observable patterns.