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Do you remember what we’ve been studying in Science?

Do you remember what we’ve been studying in Science?. Matter. What properties define matter?. Mass – measured in grams Volume – measured in ml or cm ³ Weight – measured in grams, ounces, pounds , etc. Density – measured in g/cm ³. How do we measure these things?.

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Do you remember what we’ve been studying in Science?

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  1. Do you remember what we’ve been studying in Science? Matter

  2. What properties define matter? • Mass – measured in grams • Volume – measured in ml or cm³ • Weight – measured in grams, ounces, pounds, etc. • Density – measured in g/cm³

  3. How do we measure these things? • A triple beam balance measures… • Mass • A spring scale measures… • Weight • Water displacement can help measure… • Volume of an irregular shaped item

  4. We use formulas to calculate measurements. • To find Mass - M= d x v • To find Volume – V= m ÷ d or V = l x w x h • To find Density – D= m ÷ v

  5. What are Physical and Chemical properties of matter? • Physical properties – something that can be observed or measured without changing the identity of the substance. • Chemical properties – describes a substance’s ability to form new substances with new properties

  6. Examples of Physical Properties • Mass, weight, volume, density • Color, size, shape • Texture, hardness, luster • Conductivity, magnetism, ductility • Solubility, malleability, state of matter • Melting point, freezing point, boiling point

  7. Examples of Chemical Properties • Reactivity to other substances • Oxidation (reaction to oxygen that forms rust) • Combustion(reaction to oxygen that releases heat) • Ripening, flammability

  8. Today we will learn about Conservation of Mass • Mass cannot be created or destroyed in ordinary chemical and physical changes • Mass is conserved • For example: melting ice into water or boiling water. When these physical changes occur, the mass of the substance remains the same. • Another example : mixing baking soda with vinegar. When they are combined, a gas is produced and the mass remains the same.

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