Area: Matter & Its Interactions
This Fifth Grade unit is the second in the curriculum of four (4) units developed to address the Fifth Grade science standards of the Michigan Science Standards related to Matter and Its Interactions.
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Matter is anything that takes up space and is made up of PARTICLES so tiny that only the most powerful microscope can see them. Matter makes up everything seen and unseen, including clothes, water, food, plants, air, the smell of perfume, and animals. You can describe a type of matter by its physical or chemical properties. A physical property of matter is a property that can be observed or measured that does not change the substance. Some examples are color, texture, hardness, reflectivity, and magnetism. A chemical property of matter is a property that changes a substance's identity or creates a new substance. Some examples are flammability (ability of a substance to burn), reactivity with acid, and rusting/oxidation.
The Law of Conservation of Matter states that matter cannot be created or destroyed but can change. Substances can also exist as mixtures and solutions. A mixture is a physical combination of two or more substances that can be easily separated. Some examples are trail mix, salt and pepper, cereal and milk, and pizza. A solution is a combination of two or more substances in which one substance is dissolved into another. Somes examples of a solution are salt water, Kool Aid in water, and lemonade. A physical change is a change in matter that does not change the identity of the substance. Some examples would be an ice cube melting, broken crackers, demolition of a building, and getting a haircut. A chemical change is a change in matter that does change the identity of a substance. Some examples would be wood burning, a cake baking, a nail rusting, and the formation of concrete.