By the end of this unit students should be able to:
Students will be able to:
Recognize that eyes can be damaged by bright lights and that
one should not look at the Sun—either directly or with
binoculars or telescopes.
Identify a wide range of sources of light, including the Sun,
various forms of electric lights, flames, and materials that
glow (luminescent materials).
Distinguish objects that emit their own light from those that
require an external source of light in order to be seen.
Demonstrate that light travels outward from a source and
continues unless blocked by an opaque material.
Describe changes in the size and location of Sun shadows
during the day—early morning, to midday, to late afternoon
Recognize that opaque materials cast shadows, and predict
changes in the size and location of shadows resulting from the
movement of a light source or from the movement of a shadecasting object.
Distinguish transparent materials from opaque materials by
determining if light passes through them and by examining
their shadows.
Classify materials as transparent, partly transparent
(translucent) or opaque.
Recognize that light can be reflected and that shiny surfaces,
such as polished metals and mirrors, are good reflectors.
Recognize that light can be bent (refracted) and that such
objects as aquaria, prisms and lenses can be used to show that
light beams can be bent.
Recognize that light can be broken into colours and that
different colours of light can be combined to form a new
colour.
Demonstrate the ability to use a variety of optical devices,
describe how they are used, and describe their general
structure. Suggested examples include: hand lens, telescope,
microscope, pinhole camera, light-sensitive paper, camera,
kaleidoscope.
Vocabulary for the Unit:
Colour, concave lens, convex lens, dispersion, emit, kaleidoscope,
light, light meter, luminescent, magnify, opaque, prism, rainbow,
reflect, refraction, shadow, translucent, transparent, visible
spectrum, white light
No comments:
Post a Comment