1. January 14, 2014 Day 2 Science Starters Sheet 1. Please have these Items on your desk. AR Book 2- Science Starter: Vocabulary words Chemical Property Physical Property Agenda

2. Definition: Chemical Property- a property that can only be observed by changing the identity of the substance Physical Property- a property that can be observed without changing the identity of the substance.

3. Physical versus Chemical Properties

4. 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? Reviewing MATTER

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

6. 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

7. Special Physical Properties Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure water = 0 o C Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure water = 100 o C

8. 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

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

11. Physical Changes Do NOT CHANGE THE TYPE OF MATTER Nothing new or different is formed Could be a change in: Size, Change in state, Color, Shape

12. Examples of Physical Changes Boiling, Freezing, Dissolving, Breaking Making a mixture 2 or more types of matter (substances) mixed together Not in specific amounts Can be separated physically

13. Chemical Changes The composition of the substance changes. The substances present at the beginning of the change are not present at the end; new substances are formed. The change cannot be “undone.” Picture from www.chem4kids.com www.chem4kids.com

14. Evidence of a chemical reaction Formation of gas Formation of precipitate Change in color Change in energy

15. Types of Reactions Endothermic Absorbs heat energy (gets cold) Exothermic Releases heat energy (gets hot)

16. Chemical Changes Atoms are re-arranged, NOT created or destroyed

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