In this unit, students expand their awareness of the properties of solids and liquids. Their experiences introduce them to the following concepts, skills, and attitudes.

Concepts

• Solids and liquids can be described by their properties.
• Some properties of solids are color, shape, ability to roll or stack, hardness, magnetic attraction, and whether they float or sink.
• Some properties of liquids are color, tendency to flow, degree of viscosity or fluidity, whether they are miscible with water, and whether they float or sink in water.
• Tests can be performed to investigate properties of solids and liquids that cannot otherwise be observed.

Skills

• Observing and describing the properties of solids and liquids.
• Conducting tests to investigate the properties of solids and liquids.
• Sorting solids into groups on the basis of their properties.
• Comparing similarities and differences among solids.
• Comparing similarities and differences among liquids.
• Applying tests to investigate new solids and liquids.
• Comparing the properties of solids with the properties of liquids.
• Communicating ideas, observations, and experiences through writing, drawing, and discussion.

Attitudes

• Accepting that there is more than one way to describe solids and liquids.
• Recognizing the importance of organizing information and results on charts.
• Developing an interest in investigating the physical world.