• Elementary Science Grade 2 Unit 2

    Subject: Science
    Grade: 2 
    Timeline: 12 weeks
    Unit Title: Properties of Matter

    Unit Overview: 
    In this unit students engage in scientific inquiry as they expand their understanding of solids, liquids, and gases, and how they change.  Through their experiences students see that change is a characteristic of reactions and phase changes.  They identify that solids, liquids, and gases can be described by their properties.  They see that mixtures can be separated in different ways and may change their properties by chemical or physical processes. Students see that materials may react with each other and may change from one state to another through heating or cooling. 

    Unit Objectives:
    The objectives of this unit are to apply the Next Generation Science Standards (NGSS) Crosscutting Concepts that bridge disciplinary boundaries, uniting core ideas throughout the fields of science and engineering.

    Patterns:  Patterns in the natural and human designed world can be observed.

    Cause and Effect:  Simple tests can be designed to gather evidence to support or refute student ideas about causes.

    Energy and Matter:  Objects may break into smaller pieces and be put together into larger pieces, or change shape.

    Stability and Change: Things may change slowly or rapidly.
    Science Addresses Questions About the Natural and Material World:  Scientists study the natural and material world.


    Focus Standards:
    PSSA Eligible Content:
    S4.A.1.3.3:  Observe and describe the change to objects caused by heat, cold, or light.
    S4.A.2.1.3:  Observe a natural phenomenon, record observations, and then make a prediction based on those observations.
    S4.A.2.1.4:  State a conclusion that is consistent with the information/data.
    S4.A.3.3.1:  Identify and describe observable patterns.
    S4.C.1.1.1:  Use physical properties to describe matter.
    S4.C.1.1.2:  Categorize/group objects using physical characteristics.
    S4.D.1.3.2:  Explain how water goes through phase changes. 

    NGSS 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. Matter can be described and classifed by its observable properties.
    PS1.B: Chemical Reactions: Heating or cooling a substance may cause changes than can be observed.  Sometimes these changes are reversible, and sometimes they are not.

    Concepts - Students will know:
    • that matter can exist in different states.
    • the differences between physical and chemical properties and changes.
    • about and understand solubility.
    Competencies - Students will be able to:
    • explain that solids, liquids, and gases are the states of matter most commonly encountered on Earth.
    • experience and identify matter in each state.
    • produce temperature changes that will result in a change in the state of matter.
    • recognize the difference between physical and chemical properties.
    • experience screening, filtering, and evaporation as a way to separate mixtures.
    • recognize that there are differences between mixtures and solutions through various combinations of solids, liquids, and gases.
    • explain that materials can be identified by their physical and chemical properties.
    • describe objects by hardness and reactions to simple chemical tests.
    • recognize water as the most common solvent on the Earth.   
    • explore factors that influence solubility.


    Formative Assessments:

    • Teacher observation
    • Notebooking
    • Sorting activities
    • Student sheets
    • Pre-assessment

    Summative Assessments:

    • Notebooking with rubric
    • Post-assessment

    Elements of Instruction:

    Science and Engineering Practices:

    Asking Questions and Defining Problems:

    Students asking questions and defining problems in K-2 builds on prior experiences and progresses to simple descriptive questions.

    • Students ask questions based on observations to find more information about the natural and/or designed world.
    • Students define a simple problem that can be solved through the development of a new or improved object or tool.


    Planning and Carrying Out Investigations:

    Planning and carrying out investigations to answer questions or test solutions to problems in K-2 builds on prior experiences and progresses to simple investigations based on fair tests.  This in turn provides data to support explanations or design solutions.

    • Students make observations and collect data which is used to make comparisons.
    Analyzing and Interpreting Data:

    Analyzing data in K-2 builds on prior experiences and progresses to collecting, recording, and sharing observations.

    • Students analyze data from tests of an object or tool to determine if it works as intended.

    Constructing Explanations and Designing Solutions:

    Constructing explanations and designing solutions in K-2 builds on prior experiences and progresses to the use of evidence and ideas in constructing evidence-based accounts of natural phenomena and designing solutions.

    • Students make observations (first hand or from media) to construct an evidence-based account for natural phenomena.
    Obtaining, Evaluating, and Communicating Information:

    Obtaining, evaluating, and communicating information in K-2 builds on prior experiences and uses observations and texts to communicate new information.

    • Students obtain information using various texts, test features, and other media to answer scientific questions.


    Each lesson has differentiation options for each portion of the lesson.  Options may be found in each lesson. 

    • Word walls and flip charts
    • Structured notebooks

    Interdisciplinary Connections:

    Science Literacy :
    Solids, Liquids, and Gases Class Set
    Snow Is Falling Class Copy
    Snowflake Bentley Class Copy

    Additional Resources / Games: