Analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose. (2-PS1-2)
Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot. (2-PS1-4)
Content and Skills
*Power Standard Content 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. (2-PS1-1)
* Different properties are suited to different purposes. (2-PS1-2), (2-PS1-3)
A great variety of objects can be built from a small set of pieces. (2-PS1-3)
* Every human-made product is designed by applying some knowledge of the natural world and is build using materials derived from the natural world. 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. (2-PS1-4)
Critical Language (Science & Engineering Practices)
A student in second grade can demonstrate the ability to construct an argument with evidence to support a claim. (2-PS1-4)
N atural world
Cause and effect
Matter exists in different states.
Substances can be changed and sometimes those changes can be reversed.
Factual Guiding Questions
What is matter?
What is the world made of?
What are the different states of matter?
What are properties of matter?
What causes substances to change from one state to another?
Can substance changes be reversed?
Conceptual Guiding Questions
Why does matter exist in different states?
Why do changes in matter occur?
What happens when we change the properties of matter?
Why can some substances be changed and some not be changed?
Why is it beneficial for matter to be able to change states?