Freezing Point
The freezing point of a substance is the temperature at which it changes from a liquid to a solid state. This transition occurs when the molecules of the substance slow down enough to form a stable, ordered arrangement.
Factors Affecting Freezing Point
- Pressure: Changes in pressure can affect the freezing point of a substance. Generally, an increase in pressure will lower the freezing point, while a decrease in pressure will raise the freezing point.
- Impurities: Adding impurities to a substance can lower its freezing point. This is known as freezing point depression.
Freezing Point Depression
When a solute is added to a solvent, the freezing point of the solvent is lowered. This phenomenon is known as freezing point depression and is commonly used in antifreeze solutions to prevent the freezing of liquids in cold temperatures.
Study Guide
- Define freezing point and explain the process of freezing.
- Discuss the factors that can affect the freezing point of a substance.
- Explain the concept of freezing point depression and provide examples of its practical applications.
- Calculate the freezing point depression of a solution given the molality of the solute.
- Compare and contrast the freezing points of pure substances and solutions.
◂Science Worksheets and Study Guides Eighth Grade. Rocks
Worksheet/Answer key
Rocks 
Worksheet/Answer key
Rocks Worksheet/Answer key
Rocks Vocabulary/Answer key
Rocks Vocabulary/Answer key
Rocks Vocabulary/Answer key
Rocks
Worksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Earth/Space Science: Students will use scientific skills and processes to explain the chemical and physical interactions (i.e., natural forces and cycles, transfer of energy) of the environment, Earth, and the universe that occur over time.
Earth History: Explain how sedimentary rock is formed periodically, embedding plant and animal remains and leaving a record of the sequence in which the plants and animals appeared and disappeared.
Explain how sedimentary rock buried deep enough may be reformed by pressure and heat and these reformed rock layers may be forced up again to become land surface and even mountains.