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

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

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

6. How to test the Viscosity of a Liquid

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.

9. Condensation
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.
Vapor

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

12. Thinking about sinking and floating: Density

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 solutions have a bitter taste and feel slippery.

16. Bases
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