Week of August 29, 2016/ On-Level Vocabulary 1.4 Week of August 29, 2016/ On-Level

S8P1d Physical and Chemical Properties: Density, melting point, boiling point and reactivity, combustibility.

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.

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.

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

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

How to test the Viscosity of a Liquid https://www.youtube.com/watch?v=2Gdxu4XcsbY

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

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.

Condensation The conversion of a vapor or gas to a liquid.

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. Vapor

Density A material's density is defined as its mass per unit volume.

Thinking about sinking and floating: Density https://www.youtube.com/watch?v=dcQR6vV1Sqo

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.

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 solutions have a bitter taste and feel slippery.

Bases https://www.youtube.com/watch?v=FTOEL_wE8Tk&index=5&list=PLHOGBLPrsn MpFFt1cXF4Fqrq4DdZpLHdI

Quizlet https://quizlet.com/147788594/properties-of-matter-flash-cards/?new