Performance Expectation. 2-PS1-3: Make observations to construct an evidence-based account of how an object made of a small set of pieces can be disassembled and made into a new object. [Clarification Statement: Examples of pieces could include blocks, building bricks, or other assorted small objects.]

Disciplinary Core Ideas.

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.

ETS1.B: Developing Possible Solutions

• Designs can be conveyed through sketches, drawings, or physical models. These representations are useful in communicating ideas for a problem’s solutions to other people. (secondary)

Crosscutting Concepts: Energy and Matter

• Objects may break into smaller pieces and be put together into larger pieces, or change shapes.

Performance Expectation. 2-LS2-2:  Develop a simple model that mimics the function of an animal in dispersing seeds or pollinating plants.*

Disciplinary Core Ideas.

LS2.A: Interdependent Relationships in Ecosystems

• Plants depend on animals for pollination or to move their seeds around.

ETS1.B: Developing Possible Solutions

• Designs can be conveyed through sketches, drawings, or physical models. These representations are useful in communicating ideas for a problem’s solutions to other people. (secondary)

Crosscutting Concepts: Structure and Function. The shape and stability of structures of natural and designed objects are related to their function(s).