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Science Starters: Mass, Volume & Density

This packet includes activities and assignments on mass, volume, and density. Learn about physical and chemical changes, properties of matter, and evidence of chemical reactions.

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Science Starters: Mass, Volume & Density

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  1. 1. Please have these Items on your desk. September 17 Day 1 Notebook ScienceStarters Sheet Agenda Science Starter: • Under the document camera

  2. Table of Contents update Page Date Activity/ Assignment 38 9/17 Mass, volume & density (3 page packet) 39 9/17 Lab station rotation 40 9/24 Density displacement lab 41 9/24 42 9/24 Same 43 9/24 Same 44 9/24 Same Chemical/Physical changes & properties

  3. Physical versus Chemical Properties

  4. Reviewing MATTER • Matter: anything that has mass and takes up space • Mass – the amount of matter in something • Volume – the amount of space something occupies • Which of the following is matter? • A car? • A box? • You?

  5. What is a property? • Property: a characteristic of a substance that can be observed

  6. Matter can be changed two ways • Physically • Physical reaction • Physical change • Chemically • Chemical change • Chemical reaction

  7. Physical Property Physical property: a property that can be observed without changing the identity of the substance. Examples: • luster • malleability: the ability to be hammered into a thin sheet • ductility: the ability to be stretched into a wire • melting point • boiling point • density • solubility • specific heat

  8. Special Physical Properties • Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure • Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure water = 100oC

  9. Physical Changes • Do NOT CHANGE THE TYPE OF MATTER • Nothing new or different is formed Could be a change in: A. Size B. Change in state C. Color D. Shape

  10. Examples of Physical Changes A. Boiling B. Freezing C. Dissolving (turning to a liquid) D. Breaking E. Making a mixture 2 or more types of matter (substances) mixed together • Not in specific amounts • Can be separated physically

  11. Chemical Properties • Chemical property: a property that can only be observed by changing the identity of the substance Examples: • flammability • ability to rust • reactivity with vinegar

  12. Chemical Changes • The composition of the substance changes. • Thesubstances present at thebeginningof the change are not present at the end; new substances are formed. The change cannot be easily “undone.” • Atoms are re-arranged, NOT created or destroyed Picture from www.chem4kids.com

  13. Evidence of Chemical Reactions • Chemical Reaction: The process by which the atoms of one or more substances are rearranged to form different substances. • Temperature change • Color change • Gas or solid appears

  14. https://www.youtube.com/watch?v=X328AWaJXvI • Bozeman video clip

  15. An energy change (Temperature) • Endothermic reaction-achemical reaction accompanied by the absorption of heat. • Exothermic reaction-achemical reaction that releases energy. The energy “ex”its. It is the opposite of an endothermic reaction. • https://www.youtube.com/watch?v=L-G7pLufXAo

  16. Example of everyday endothermic reactions • https://www.youtube.com/watch?v=7q04F-juT-c

  17. Law of Conservation of Matter • Matter is conserved  type of atoms does not change. • Nothing is created or destroyed.

  18. Consider the following examples, which of these are phyiscal and which are chemical change • Heating sugar vs. adding sugar to water • Cutting wood vs. burning wood. 3. The electrolysis of water vs. ice melting.

  19. Answers. . . . . . . .. • Physical ChangeChemical Change 1. Sugar dissolving Sugar heating 2. Cutting Wood Burning Wood 3. Melting Ice Electrolysis of water

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