Twenty-one hands-on activities are included in this 176-page spiral-bound book. Students can write answers or do calculations right in the book. Some pages can be cut out. Each activity has a list of required materials, most of which are available in this catalog. Includes a glossary and a key to identifying objects on the photographic plates. See also 14 Plate Set with Key and Teacher's Guide (below).

The activities are divided into 3 units:

• Observing and Measuring Astronomical Time
• Measuring Astronomical Distances using Triangles
• Measuring Astronomical Distances using Apparent Brightness

PS-01: Activity Book $16.00

No photo available.

This 48-page addendum to Where We Are in Space and Time, gives answers to the homework questions and problems, and offers suggestions on how to approach each activity. Black and white prints are included to be used as masters.

PS-12: Teacher's Guide $7.50