Since the distances to the stars cannot be measured directly, astronomers use a variety of techniques including triangulation and parallax, comparison of absolute and apparent magnitude, and Cepheid variables. Triangulation is an indirect method of measuring the distance to an object by imagining a triangle between the observer at two positions and the object (see Fig.1). Parallax, as used in this activity, is the apparent motion of a relatively close object when viewed by the observer from two different positions. In this activity, students learn how parallax and triangulation can be used to indirectly measure the distance to stars. Students will also consider the limitations of using parallax to measure the distance to objects that are further away.
VERTICAL AGRICULTURE, WINDOW GARDENING WITH MANUAL IRRIGATION RESERVOIRS. A COMPARISON OF SOIL AND HYDROPONICS BEADS.
Categories: Lab/Student Activity
Our project involved a collaboration between four RDSB schools (using G-Suite Apps). The attached PDF file provides a detailed description of our efforts. The general purpose of the project was to... read more
This resource has been developed by the Science Teachers' Association of Ontario / L'association des professeurs de sciences de l'Ontario with funding and technical support from Maple Leaf... read more
Over-arching Inquiry: How can an understanding of Mechanical Advantage and Mechanical Efficiency help to create a useful application for everyday life? (teacher note: you can always have students... read more