7+Chemistry

**7th Grade: Chemistry **


Key Idea 3: Matter is made up of particles whose properties determine the observable characteristics of matter and its reactivity. Key Idea 4: Energy exists in many forms, and when these forms change energy is conserved.** ||~  ||
 * = **Month** || **January-February** ||~  ||
 * = **Duration** || **3 Weeks** ||~  ||
 * = **Content** || **Chemistry: Properties of Matter, Phases of Matter, Physical & Chemical Changes** ||~  ||
 * = **Key Ideas** || **Standard 4: Physical Setting
 * = **Standards** || * //**Performance Indicator 3.1: Observe and describe properties of materials, such as density, conductivity, and solubility.**//
 * **3.1a: Substances have characteristic properties. Some of these properties include color, odor, phase at room temperature, density, solubility, heat and electrical conductivity, hardness, and boiling and freezing points.**
 * **3.1c: The motion of particles helps to explain the phases (states) of matter as well as changes from one phase to another. The phase in which matter exists depends on the attractive forces among its particles.**
 * **3.1d: Gases have neither a determined shape nor a definite volume. Gases assume the shape and volume of a closed containers.**
 * **3.1e: A liquid has definite volume, but takes the shape of a containers.**
 * **3.1f: A solid has definite shape and volume. Particles resist a change in position.**
 * **3.1h: Density can be described as the amount of matter that is in a given amount of space. If two objects have equal volume, but one has more mass, the one with more mass is denser.**
 * **3.1: Buoyancy is determined by comparative densities.**
 * //**Performance Indicator 3.2: Distinguish between chemical and physical changes.**//
 * **3.2a: During a physical change a substance keeps its chemical composition and properties. Examples of physical changes include freezing, melting, condensation, boiling, evaporation, tearing, and crushing.**
 * **3.2b: Mixtures are physical combinations of materials and can be separated by physical means.**
 * **3.2c: During a chemical change, substances react in characteristic ways to form new substances with different physical and chemical properties. Examples of chemical changes include burning of wood, cooking of an egg, rusting of iron, and souring of milk.**
 * **3.2d: Substances are often placed in categories if they react in similar ways. Examples include metals, nonmetals, and noble gases.**
 * **3.2e: The Law of Conservation of Mass states that during an ordinary chemical reaction matter cannot be created or destroyed. In chemical reactions, the total mass of the reactants equals the total mass of the products.**
 * //**Performance Indicator 4.2:** **Observe and describe heating and cooling events.**//
 * **4.2c: During a phase change, heat energy is absorbed or released. Energy is absorbed when a solid changes to a liquid and when a liquid changes to a gas. Energy is released when a gas changes to a liquid and when a liquid changes to a solid.**
 * **4.2d: Most substances expand when heated and contract when cooled. Water is an exception, expanding when changing to ice.** ||  ||
 * = **Relevant Vocabulary** || **Density, Mass, Weight, Volume, Phase, Solid, Liquid, Gas, Evaporation, Condensation, Freezing, Melting, Sublimation, Physical Change, Chemical Change** ||  ||
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 * **Labs ** ||  || <span style="display: block; color: rgb(222, 18, 18); text-align: center;"> ||
 * **<span style="display: block; color: rgb(222, 18, 18); text-align: center;">Additional Resources ** || ||  ||