Why Does Cooking Eggs Make Them Hard?

Jessi and Squeaks grab a snack and learn all about why boiling eggs makes them hard!

Second Grade Next Generation Science Standards

Disciplinary Core Ideas:

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 (2-PS1-1).

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).

Performance Expectations:

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

2-PS1-4. Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot.