This simple reading on atoms is geared toward younger learners, but it does not speak down to the students. This text uses grouped paragraphs along with a reflection box to encourage students to summarize what they have learned, draw pictures about it and discuss what they learned with their peers.
This assignment could be used to aid learning for the following standards:
MS-PS1-4 (Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.)
MS-PS1-5 (Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.)
HS-PS1-1 (Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.)
HS-PS1-2 (Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.)
HS-PS1-8 (Develop models to illustrate the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.)