Chemical Changes and Matter · Term 1

Crystallization: Obtaining Pure Substances

Students will learn the process of crystallization as a method to obtain pure substances from solutions.

Key Questions

  1. Explain the process of crystallization and its importance.
  2. Compare crystallization with evaporation as a separation technique.
  3. Analyze the factors that influence the size and shape of crystals.

CBSE Learning Outcomes

CBSE: Physical and Chemical Changes - Class 7
Class: Class 7
Subject: Science (EVS K-5)
Unit: Chemical Changes and Matter
Period: Term 1

Suggested Methodologies

Experiential Learning

Learn through direct experience, then reflect and connect to theory

30–60 min

Learn more about Experiential Learning

Inquiry Circle

Small groups investigate an open question without direct instruction

30–55 min

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Bases: Properties and Indicators

Students will identify the characteristic properties of bases and use indicators to detect their presence.

2 methodologies

Neutralization Reactions

Students will understand the concept of neutralization, where acids and bases react to form salt and water, and its applications.

2 methodologies

Salts: Formation and Uses

Students will explore the formation of various salts through neutralization and their common uses in daily life.

2 methodologies

Physical Changes: Reversible Transformations

Students will observe and classify physical changes, focusing on changes in state, shape, or size without forming new substances.

2 methodologies

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