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ES: G2 Materials Matter: Home

Resources to support the Grade 2 Materials unit of inquiry.

Cross Cutting Concepts


2-PS1.1 - Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.  

2-PS1.2 Analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose.*  

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. 

Key Vocabulary

  Waterproof 防水  Absorbent 能吸收  Rigid 坚硬  Flexible 易弯曲  Texture  xxx Rough  粗糙  Smooth 光滑  Transparent 透明  opaque 不透明  sticky 胶粘  melt xxx  soft   hard   Bend xxx  Sink   float   elastic (stretchy)   curved   straight   big   small   thin   thick   strong   weak   fragile 易碎  tough 有韧性  heavy   light  

Enduring Understanding

Materials have properties that can make them useful for an intended purpose. 


Essential Questions

  • ​​​​​​How can you describe a material based on its property? 


    How can you classify a material based on its properties? 


    Why do we choose a particular material for an intended purpose?  


Knowledge and Skills