In this unit, students investigate the properties of a variety of common household chemicals. From their experiences, they are introduced to the following concepts, skills, and attitudes.

• Common household chemicals have different physical and chemical properties.
• Chemicals undergo changes in form, color, or texture when they are mixed together, separated, or heated.
• Some chemicals can be identified by their interaction with water, vinegar, iodine, red cabbage juice, and heat.
• Different types of mixtures, such as solutions or suspensions, are created when solids are combined with water.
• Evaporation and filtration are methods for separating mixtures of solids and liquids.
• Some chemicals can be classified as acids, bases, or neutral substances on the basis of their reactions with red cabbage juice.

Skills

• Observing and describing properties of materials.
• Learning to perform different physical and chemical tests.
• Predicting, observing, describing, and recording results of tests.
• Analyzing and drawing conclusions from the results of tests.
• Comparing and contrasting test results to define the properties of household chemicals so they can be identified.
• Supporting conclusions with reasons based on experiences.
• Communicating results and reflecting on experiences through writing and discussion.
• Applying previously learned knowledge and skills to solve a problem.
• Reading to enhance understanding of chemistry concepts.
• Developing proper laboratory techniques to ensure safety and avoid contamination.

Attitudes

• Developing an interest in exploring and investigating properties of chemicals.
• Recognizing the importance of guidelines for experimentation.
• Developing an awareness of the importance of chemicals in our lives.
• Developing an appreciation for the safe handling of chemicals.