B. Objects and substances can be classified by their physical and chemical properties. Mass is the amount of matter (or "stuff") in an object. Weight, on the other hand, is the measure of force of attraction (gravitational force) between an object and Earth.
The concepts of mass and weight are complicated and potentially confusing to elementary students. Hence, the more familiar term of "weight" is recommended for use to stand for both mass and weight in grades K-5. By grades 6-8, students are expected to understand the distinction between mass and weight, and use them appropriately.
Clarification for grades K-2: The use of the more familiar term ‘weight’ instead of the term “mass” is recommended for grades K-2.
Clarification for grades 3-5: In grade 3, introduce the term mass as compared to the term weight. In grade 4, investigate the concept of weight versus mass of objects. In grade 5, discuss why mass (not weight) is used to compare properties of solids, liquids and gases.
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STEM Lessons - Model Eliciting Activity
In this Model Eliciting Activity (MEA), students will use their knowledge of the organization of the periodic table and the basic properties of atoms to determine which elements should be used to develop compounds with two atoms of different elements. Students must determine the number of protons, neutrons, and electrons in a neutrally charged atom of an element using the periodic table. They must also determine which elements will likely bond together using their location on the periodic table. Students completing this MEA will develop two short essay responses to a client in the scientific industry.
Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. Click here to learn more about MEAs and how they can transform your classroom.
Original Student Tutorials Science - Grades K-8
Explore the organization of elements on the Periodic Table and pay special attention to energy levels of elements that share periods in this interactive tutorial.
This is part 1 of 2 in a series of tutorials on the periodic table. Click below to open part 2.
Explore the organization of elements into groups on the periodic table and what the group location indicates about an element's atomic structure.
This is part 2 of 2 in a series of tutorials on the periodic table. Click below to open part 1.
Student Resources
Original Student Tutorials
Explore the organization of elements into groups on the periodic table and what the group location indicates about an element's atomic structure.
This is part 2 of 2 in a series of tutorials on the periodic table. Click below to open part 1.
Type: Original Student Tutorial
Explore the organization of elements on the Periodic Table and pay special attention to energy levels of elements that share periods in this interactive tutorial.
This is part 1 of 2 in a series of tutorials on the periodic table. Click below to open part 2.
Type: Original Student Tutorial
Text Resource
This web site features an interactive periodic chart that provides information on the elements, including a description, physical and thermal properties, abundance, isotopes, ionization energy, the element's discoverer, translations of element names into several languages, and bibliographic information on research-and-development publications involving the element. Additional information includes technical information and information on manufactured products for elemental metals, metallic compounds, and ceramic and crystalline products. The American Elements company manufactures engineered and advanced material products.
Type: Text Resource
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Students test their knowledge about the names of elements and learn some of their properties through the hint provided with each scrambled word
Type: Video/Audio/Animation
Students match the names of elements of the periodic table with their symbols
Type: Video/Audio/Animation
This game tests students' knowledge about elements, such as their symbols, atomic numbers, and names
Type: Video/Audio/Animation