8th Grade Science Guide

8.1: Chemistry 3 Dimensions & Progressions

Unit 2

STANDARD ● 8.1.1 Develop a model to describe the scale and proportion of atoms and molecules. Emphasize developing atomic models of elements and their numbers of protons, neutrons, and electrons, as well as models of simple molecules . Topics like valence electrons, bond energy, ionic complexes, ions, and isotopes will be introduced at the high school level. (MS-PS1-1)

CONCEPTS

SKILLS

● Scale & proportion of atoms and molecules

● Develop a model

LEARNING PROGRESSIONS

● All matter is made of atoms. ● Atoms are too small to see

● Atoms combine with one another in various ways to make up substances ● Atoms form molecules that range in size from two to thousands of atoms ● Each atom has a structure containing a nucleus, which is made of protons and neutrons, and is surrounded by electrons.

VOCABULARY ● Atom

● Neutron ● Nucleus

● Gas ● Liquid ● Solid

● Molecule ● Proton ● electron

● Chemical Boned ● Atomic Number

POSSIBLE PHENOMENA ● Pencil lead (graphite), diamond, and charcoal are all made of carbon. ● Sugar (sucrose), rubbing alcohol (isopropyl alcohol), and nail polish remover (acetone) are made of carbon, hydrogen, and oxygen in them but they are not the same. ● Synthetic insulin and natural insulin molecules both have the same proportion of Carbon, Hydrogen, Nitrogen, Oxygen, and Sulfur. END OF UNIT COMPETENCY WITH LANGUAGE SUPPORTS ● I can create a model to show the scale and proportion of an atom or molecule. ○ Language Supports: ■ Abstract nouns to introduce concepts (model, scale, proportion)

■ Labeling/describing diagrams, graphics. (title, description, labels) (in our model we show scale by ____, the scale of our diagram is ____. Our model shows_____.)

DIFFERENTIATION IN ACTION