Freezing Point
The freezing point of a substance is the temperature at which it changes from a liquid to a solid state. It is the temperature at which the vapor pressure of the solid and the liquid phases are equal and the substances exist in equilibrium. The freezing point is a characteristic property of a substance and can be used to identify and purify it.
Factors Affecting Freezing Point
The freezing point of a substance can be affected by various factors, including:
- Pressure: Generally, an increase in pressure leads to a decrease in the freezing point of a substance, and a decrease in pressure leads to an increase in the freezing point.
- Impurities: The presence of impurities in a substance can lower its freezing point. This is known as freezing point depression.
- Molecular Size and Structure: The size and structure of molecules can also affect the freezing point of a substance.
Study Guide
To understand the concept of freezing point, it is important to:
- Learn about the molecular structure and intermolecular forces of different substances.
- Understand the concept of equilibrium between the solid and liquid phases of a substance at its freezing point.
- Explore the effects of impurities and pressure on the freezing point of a substance.
- Practice solving problems related to freezing point depression and elevation.
Additional resources such as textbooks, online tutorials, and hands-on experiments can also aid in understanding the concept of freezing point.
.◂Science Worksheets and Study Guides Sixth Grade. Plate Tectonics
Worksheet/Answer key
Plate Tectonics 
Worksheet/Answer key
Plate Tectonics Worksheet/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics
Worksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
EARTH AND SPACE SCIENCE
Earth’s Systems
Use evidence to explain how different geologic processes shape Earth’s history over widely varying scales of space and time (e.g., chemical and physical erosion; tectonic plate processes; volcanic eruptions; meteor impacts; regional geographical features, including Alabama fault lines, Rickwood Caverns, and Wetumpka Impact Crater).
Provide evidence from data of the distribution of fossils and rocks, continental shapes, and seafloor structures to explain past plate motions.
Use models to explain how the flow of Earth’s internal energy drives a cycling of matter between Earth’s surface and deep interior causing plate movements (e.g., mid-ocean ridges, ocean trenches, volcanoes, earthquakes, mountains, rift valleys, volcanic islands).