1. Vocabulary 1.4 Week of August 29, 2016/ Advanced

2. Physical Properties  A characteristic of a pure substance that can be observed without changing it into another substance.  Example – when water freezes at a temperature of 0 degrees Celsius, it changes to a solid called ice but it is still water. The properties do not change.  Characteristics of physical properties – Hardness, Texture, Color, or if the substance is solid, liquid, gas, or plasma.

3. Chemical Properties  A characteristic of a pure substance that describes its ability to change into a different substance.  To observe the chemical properties you must try to change it into a different substance.  Example: Methane (natural gas) can burn while in the air. While burning it is combining with oxygen in the air forming new substances, water and carbon dioxide.

4. The Physical Properties and Chemical Properties of Matter - Chemistry  https://www.youtube.com/watch?v=C4pQQQNwy30 https://www.youtube.com/watch?v=C4pQQQNwy30

5. Viscosity  A property of liquid – this is a liquids resistance to flowing.

6. The Sci Guys: Science at Home - SE2 - EP7: Viscosity of Liquids  https://www.youtube.com/watch?v=f6spBkVeQ4w https://www.youtube.com/watch?v=f6spBkVeQ4w

7. Melting Point  The temperature at which a solid substance melts or fuses.

8. Boiling Point  The temperature at which a given material changes from a liquid to a gas.  The boiling point is the same temperature as the condensation point. (See phases of matter.)  Note: Water boils at 212 degrees Fahrenheit or 100 degrees Celsius.

9. Condensation  Water that collects as droplets on a cold surface when humid air is in contact with it.  The conversion of a vapor or gas to a liquid.

10. Vaporization  Vaporization is the way molecules change from a solid or liquid to a gas.  For vaporization to happen, heat is necessary. Heat is energy.  Some liquids change to a vapor at room temperature by pulling heat from the environment. Vapor

11. Density  A material's density is defined as its mass per unit volume.  The Density Calculator uses the formula that density (p) is equal to mass (M) divided by volume (V) or p=M/V.

12. Density  https://www.youtube.com/watch?v=SimFy9wOMXY

13. Acid  A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.  A molecule or other entity that can donate a proton or accept an electron pair in reactions.

14. Base  Any of a class of compounds that form hydroxyl ions (OH) when dissolved in water, and whose aqueous solutions react with acids to form salts.  Bases turn red litmus paper blue and have a pH greater than 7.  Their aqueous solutions have a bitter taste and feel slippery.

16. Acid-Base Reactions in Solution: Crash Course Chemistry #8  https://www.youtube.com/watch?v=ANi709MYnWg https://www.youtube.com/watch?v=ANi709MYnWg