hardness

"Introduces basic concepts about the property of hardness of matter. Readers learn how to identify hardness through senses and tests, as well as how hardness may change"--Provided by publisher.

Depicts familiar items that are flexible and items that are rigid to demonstrate the concept of elasticity and the basic properties of matter.

Shows differences between things that are hard and things that are soft.

Uses illustrations and simple text to teach young readers about the differences between soft and hard objects.

Describes the basic properties of materials, contrasting things that are hard and things that are soft, and includes photographs, a picture glossary, and a quiz.

Uses illustrations and simple text to teach young readers about the differences between soft and hard objects.

Uses everyday examples, such as a baseball and a beach ball, to demonstrate the contrast between hard and soft objects.