## Topic outline

• • • ### Unit 1 - Scientific Method and Measurement

In this opening unit, students investigate how science investigates questions - how do scientists know what they claim to know? Students learn to pose good scientific questions, design and carry out their own experiments, collect and analyze data, and present and defend their results to their peers. They identify variables and controls in an experiment, distinguish between the different parts of a scientific method, and create a proper hypothesis.

Basic metric conversions will be reviewed as students begin to work with scientific notation calculations and the rules that govern addition, subtraction, multiplication, and division of numbers in scientific notation. Measurement practice is done using significant figures with students recognizing the uncertainty of the measurement tools used in the laboratory. Practice calculations are also performed with significant figures. Students are expected to be able to add, subtract, divide, and multiply measurement values using significant figures. Students calculate density, percent error, and convert between temperature measurements.

• ### Unit 2 - Matter

Students study the basic properties of matter, distinguishing between physical and chemical properties. Basic changes in matter is reviewed with students ultimately being able to describe the differences between the liquid, solid, and gas states of matter, as well as identifying physical and chemical changes. Mixtures and pure substances are discussed with elements, compounds, solutions, alloys, heterogeneous mixtures and homogeneous mixtures being main points of emphasis. Students calculate pressure, volume, and temperature measurements using the different gas laws. They understand the relationship between pressure, volume, and temperature and how they act together in a system.

• ### Unit 3 - Atoms

Students gain an understanding of the history of the Atomic Theory and how the idea of the atom has changed throughout history. The current model of the atom is studied with students understanding how each of the subatomic particles are arranged within the atom. The concept of average atomic mass will be understood and practiced by calculating this value and the percent abundance of different isotopes of a particular element will be required. Students begin to understand basic isotope notation.

• ### Unit 4 - Periodic Table

This unit addresses the periodic table of the elements, its creation, and its arrangement, including different families of the periodic table and their common properties. Being able to describe three trends within the periodic table, first ionization energy, atomic radius, and electronegativity will be a focus of the work done with the periodic table. Using the periodic table to identify the atomic mass, atomic number, and specific quantities of electrons, protons, and neutrons, will be required for use within future units.

• • ### Unit 7 - Chemical Reactions

In this unit students begin by learning how to balance equations, which will help provide the understanding of the Law of Conservation of Mass. The unit then moves on to distinguishing between different types of chemical equations and reactions, including Combination Reactions, Decomposition Reactions, Single Replacement Reactions, Double Replacement Reactions, and Combustion Reactions. Students predict the products of these different reactions as well.

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