--- title: 8.P1U1.2 description: 8.P1U1.2 Obtain and evaluate information regarding how scientists identify substances based on unique physical and chemical properties. image: https://www.knowatom.com/hubfs/Right%20Image.png --- [![Teacher Login](https://no-cache.hubspot.com/cta/default/347944/f56bee57-133e-4975-8055-799f1f23588b.png)](https://cta-redirect.hubspot.com/cta/redirect/347944/f56bee57-133e-4975-8055-799f1f23588b) [Teacher Login](https://app.knowatom.com/signin) [![KnowAtom Logo](https://www.knowatom.com/hubfs/KnowAtom%20Logo.svg "KnowAtom Logo")](https://www.knowatom.com/) # 8.P1U1.2 Obtain and evaluate information regarding how scientists identify substances based on unique physical and chemical properties. [![Download a Sample Unit](https://no-cache.hubspot.com/cta/default/347944/20eee377-e175-48fe-a039-ae723137a2a6.png)](https://cta-redirect.hubspot.com/cta/redirect/347944/20eee377-e175-48fe-a039-ae723137a2a6) Science & Engineering Practices - [Developing and using models](https://www.knowatom.com/developing-and-using-models) - [Analyzing and interpreting data](https://www.knowatom.com/analyzing-and-interpreting-data) - [Constructing explanations and designing solutions](https://www.knowatom.com/constructing-explanations-and-designing-solutions) - [Engaging in argument from evidence](https://www.knowatom.com/engaging-in-argument-from-evidence) - [Obtaining evaluating and communicating information](https://www.knowatom.com/obtaining-evaluating-and-communicating-information) Disciplinary Core Ideas - [Earth Materials and Systems](https://www.knowatom.com/earth-materials-and-systems) - [Structure and Properties of Matter](https://www.knowatom.com/structure-and-properties-of-matter) - [Chemical Reactions](https://www.knowatom.com/chemical-reactions) - [Conservation of Energy and Energy Transfer](https://www.knowatom.com/conservation-of-energy-and-energy-transfer) [![New call-to-action](https://no-cache.hubspot.com/cta/default/347944/b5a1446e-d782-4a5f-a019-0b3b98c8304f.png)](https://cta-redirect.hubspot.com/cta/redirect/347944/b5a1446e-d782-4a5f-a019-0b3b98c8304f) ## 8.P1U1.2 Grade Ranges All K-2 3-5 6-8 [![](https://www.knowatom.com/hubfs/Grade/Screenshot%20(28).png) ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/engineering-chemical-cold-pack-reactions) ## [Engineering Chemical Cold Pack Reactions In this unit, students explore several phenomena that relate to cooking. In this lesson, students evaluate chemical reactions, and use that knowledge to engineer a prototype that transfers energy by chemical processes. This page showcases key components of this lesson. ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/engineering-chemical-cold-pack-reactions) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/engineering-chemical-cold-pack-reactions) [![](https://www.knowatom.com/hubfs/Grade/Screenshot%20(32).png) ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/the-rock-cycle) ## [The Rock Cycle In this unit, students use what they know about the relationship between energy and matter to investigate phenomena of how energy powers the cycling of Earth materials. They begin with this lesson on modeling the Earth processes that form different kinds of rock. This page provides an overview of this lesson.  ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/the-rock-cycle) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/the-rock-cycle) [![](https://www.knowatom.com/hubfs/Grade/Screenshot%20(32).png) ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/renewable-energy) ## [Renewable Energy In this unit, students explore the natural processes that cause Earth’s surface to change over time, analyzing how energy causes Earth’s matter to transform and cycle from one form to another. In this lesson, they trace phenomena of how energy is transferred in chemical reactions, which allows scientists to produce ethanol to use as an alternative energy source. This page showcases each component of this lesson.](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/renewable-energy) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/renewable-energy) [![](https://www.knowatom.com/hubfs/image3-Oct-09-2023-06-17-27-2694-AM.png) ](https://www.knowatom.com/science-phenomena-videos/8th-grade-science/polymer-structure-and-function) ## [Polymer Structure and Function In this unit, students use the phenomenon of why certain materials (such as the materials that make up a baseball) are useful for a particular function to explore the relationship between matter and energy phenomena. In this lesson students manipulate the properties of a polymer bouncy ball by changing the amounts of reactants in a chemical reaction. This page highlights parts of this lesson. ](https://www.knowatom.com/science-phenomena-videos/8th-grade-science/polymer-structure-and-function) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/8th-grade-science/polymer-structure-and-function) [![](https://www.knowatom.com/hubfs/image1-Oct-08-2023-07-35-59-3594-PM.png) ](https://www.knowatom.com/science-phenomena-videos/6th-grade-science/atoms) ## [Atoms In this unit, students build on their knowledge of energy by exploring the relationship between energy and matter. They begin by modeling the structure of atoms and how atoms come together to form all of the matter in the universe. This page showcases each section of this lesson.](https://www.knowatom.com/science-phenomena-videos/6th-grade-science/atoms) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/6th-grade-science/atoms) [![](https://www.knowatom.com/hubfs/image4-Oct-08-2023-07-36-35-4598-PM.png) ](https://www.knowatom.com/science-phenomena-videos/6th-grade-science/molecules) ## [Molecules In this unit, students explore the science phenomena of interactions between energy and matter, analyzing how matter can only change when enough energy is present. In this lesson, they investigate the structure of molecules, relating this structure to the matter’s properties. This page is a high-level extract of this lesson.](https://www.knowatom.com/science-phenomena-videos/6th-grade-science/molecules) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/6th-grade-science/molecules) [![](https://www.knowatom.com/hubfs/Screenshot%20(33).webp) ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/natural-resources) ## [Natural Resources In this unit, students use what they know about the relationship between energy and matter to investigate how energy powers the cycling of Earth materials. In this lesson, they analyze the phenomena of processes that form fossil fuels, which determine how these natural resources are distributed around the planet. This page highlights all the parts of this lesson. ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/natural-resources) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/7th-grade-science/natural-resources) [![](https://www.knowatom.com/hubfs/image1-Nov-01-2023-04-00-14-6692-PM.png) ](https://www.knowatom.com/science-phenomena-videos/8th-grade-science/polymer-structure-and-function-ma) ## [Polymer Structure and Function In this unit, students use the phenomenon of why certain materials (such as the materials that make up a baseball) are useful for a particular function to explore the relationship between matter and energy phenomena. In this lesson students manipulate the properties of a polymer bouncy ball by changing the amounts of reactants in a chemical reaction. This page highlights key parts of this lesson.](https://www.knowatom.com/science-phenomena-videos/8th-grade-science/polymer-structure-and-function-ma) [ VIEW LESSON ](https://www.knowatom.com/science-phenomena-videos/8th-grade-science/polymer-structure-and-function-ma) Standards citation: NGSS Lead States. 2013. *Next Generation Science Standards: For States, By State*s. Washington, DC: The National Academies Press. 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