APPARENT AND ABSOLUTE MAGNITUDE
ESTIMATED TIME TO COMPLETE: One 50-minute period
CONCEPT(S) LEARNED IN THIS MODULE:
- Students will be able to describe the relationship between star brightness and distance from Earth.
STANDARDS ADDRESSED IN THIS MODULE:
- Stars appear to have different brightness because some are, in fact, brighter and because they are at different distances from Earth.
AAAS Project 2061 Benchmarks
- The stars differ from each other in size, temperature, and age, but they appear to be made up of the same elements that are found on the earth and to behave according to the same physical principles. Unlike the sun, most stars are in systems of two or more stars orbiting around one another. (4A, Grades 9-12)
Maryland State Department of Education High School Science Core Learning Goals
TECHNOLOGY-ENHANCED INSTRUCTIONAL STRATEGIES UTILIZED IN THIS MODULE:
- The student will use a variety of resources to identify techniques used to investigate Earth and the Universe.
- Image Presentation
- Information Searches
Click on the hot links below to download
PowerPoint slides or to follow links to other sites.
||Brief Description of Module
||Materials / Technology
||Students are shown some lamps of different brightness and asked some questions relating inherent brightness and distance.
||Individual or small groups
||Overhead projector (OP) or PowerPoint (PP) to post the Warm Up questions.
||Discussion of student answers and presentation of various images of star fields showing stars of different brightness. Activity: Students will make their own constellations by connecting bright stars with lines to form pictures of their own choosing.
||OP or PP to show images of star fields
Handout of Activity.
||Presentation and discussion of student work, and of the constellations seen by the ancients.
||Handout of constellations with explanation.
||Description of absolute and apparent magnitudes. Students should understand that the dim and insignificant stars in the handout could be very bright and distant (and could even be galaxies) or very dim and nearby.
||Sequence of images zooming into a dim "star" that is then
revealed to be a galaxy. This can be accomplished with software such as
||Students will be evaluated on the quality and creativity of their constellations.
||Rubric (of student's design if desired)
EXPECTED MODULE OUTCOMES:
PERFORMANCE-BASED ASSESSMENT OF MODULE OUTCOMES:
- Students will gain further appreciation for the sunís position in space among the stars and how these are not all the same and are located at various distances from us.
- Students will be able to describe how some stars are dim and others bright and explain how their various distances from us influence how bright they look from Earth.