Crescent Moon

by: Page Keeley and Cary Sneider

The purpose of this assessment probe is to elicit students’ ideas about how much of the spherical Moon is lit by the Sun at any point in time. The probe is designed to reveal whether students recognize that at any point in time the Sun shines on half of the Moon, even though we see only a part of the lit face of the spherical Moon during the crescent, quarter, or gibbous phase.

Grade Levels

Elementary High School Middle School


Assessment Astronomy Earth & Space Science Phenomena Three-Dimensional Learning


Type Book ChapterPub Date 3/23/2012Stock # PB307X_24

NSTA Press produces classroom-ready activities, hands-on approaches to inquiry, relevant professional development, the latest scientific education news and research, assessment and standards-based instruction.

Learn More