Universal Solvent
The term "universal solvent" refers to a substance that has the ability to dissolve a wide range of solutes. Water is often referred to as the universal solvent because of its unique properties that allow it to dissolve many different substances. This property makes water essential for life on Earth, as it can dissolve and transport essential nutrients and minerals.
Properties of Water as a Universal Solvent:
- Polarity: Water is a polar molecule, meaning it has a slightly positive end and a slightly negative end. This polarity allows water to interact with and dissolve other polar and ionic substances.
- Hydrogen Bonding: Water molecules can form hydrogen bonds with other polar molecules, which facilitates the dissolution of substances in water.
- Versatility: Water can dissolve a wide variety of solutes, including salts, sugars, acids, and gases.
Study Guide:
- Define the term "universal solvent" and provide an example.
- Explain the importance of water as a universal solvent in biological systems.
- Describe the properties of water that make it an effective universal solvent.
- Compare and contrast the solubility of polar and nonpolar substances in water.
- Discuss the role of universal solvents in environmental processes, such as weathering and erosion.
Understanding the concept of a universal solvent, specifically water, is crucial in the study of chemistry, biology, and environmental science. It is important to grasp the properties and significance of water as a solvent in various natural and artificial processes.
.◂Science Worksheets and Study Guides Seventh Grade. Ecosystems, food chains and food webs
Study Guide
Ecosystems, food chains and food webs 
Activity Lesson
Ecosystems, Food Chains & Food Webs Worksheet/Answer key
Ecosystems, food chains and food webs Worksheet/Answer key
Ecosystems, food chains and food webs Worksheet/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Ecosystems: Interactions, Energy, and Dynamics
Examine the cycling of matter between abiotic and biotic parts of ecosystems to explain the flow of energy and the conservation of matter.
Analyze and interpret data to provide evidence regarding how resource availability impacts individual organisms as well as populations of organisms within an ecosystem.
Construct an explanation to predict patterns of interactions in different ecosystems in terms of the relationships between and among organisms (e.g., competition, predation, mutualism, commensalism, parasitism).
Engage in argument to defend the effectiveness of a design solution that maintains biodiversity and ecosystem services (e.g., using scientific, economic, and social considerations regarding purifying water, recycling nutrients, preventing soil erosion).