Energy and Matter 
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.
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 软 hard 硬 Bend xxx Sink 沉 float 浮 elastic (stretchy) 有弹性 curved 弯 straight 直 big 大 small 小 thin 薄 thick 厚 strong 强 weak 弱 fragile 易碎 tough 有韧性 heavy 重 light 轻
EU - People choose different materials based on its properties for different purposes.
人 们 根 据 材 料 的 属 性 和 不 同 的 用 途 选 择 不 同 的 材 料
How are materials similar or different?
各 种 材 料之 间 有 什 么 相 同 和 不 同 之处?
How do properties of matter change?
物 质 的 属 性 是 怎 么 变 化 的?
How can we use different materials for a different purpose?
我 们 如 何 根 据 不 同 需 要 使 用 不 同 的 材 料?
I Survived Hurricane Katrina 2005 by 
I Survived the Destruction of Pompeii, 79 A. D. by 
I Survived the Eruption of Mount St. Helens, 1980 by 
I Survived the Japanese Tsunami 2011 by 
I Survived the San Francisco Earthquake 1906 by 