The representation depicts the position of the Earth relative to the Sun during the southern hemisphere's winter solstice and includes line of latitude and the angle of the Sun's rays at the Tropic of Capricorn.
- Resource Copyright Owner: Michael Pidwirny
- Type of Resource: video/quicktime
The resource addresses the actual substance of the learning goal rather than
just the topic.
The resource states, "In the animation, the South Pole is tilted 23.5° toward the sun. This condition causes the sun's rays to be most intense at the Tropic of Capricorn (23.5° South)."
The resource addresses the indicated part of the learning goal:
[The intensity of sunlight striking a place on the surface of the Earth depends upon where the Earth is in its yearly orbit around the sun and how far the place is from the equator.] These variations of intensity as the Earth orbits the sun explain the seasonal variations in temperatures at different places on the surface of the Earth.
The resource correctly reflects the level of sophistication of the learning
The diagram of the Earth and Sun is not complex, and the text uses appropriate language to explain the diagram.
Notes for Teachers
Explain that these variations of intensity as the Earth orbits the sun explain the seasonal variations in temperatures at different places on the surface of the Earth.
Quality of instructional support
Does the representation accurately represent relevant aspects of the learning goal and/or brings out limitations that are not accurate?
Yes—The representation accurately represents relevant aspects of the learning goal and brings out inaccuracies, if there are any.
The resource clarifies that the intensity of the Sun's rays are illustrated by the angle of light at the Tropic of Capricorn. The resource also addresses the position of the Sun in the sky at this location, and the amount of daylight at the two poles on this day.
Is the representation likely to be comprehensible to students?
Partial—The representation might make the learning goal comprehensible to students.
The resource only addresses the Sun's light for one day of the year and in one location on Earth.
Does the representation make clear which aspects of the real thing are represented and which are not?
No—The representation does not make clear which aspects of the real thing are represented and which are not.
There is no disclaimer stating that the size and distances of the Earth and sun not to scale.
Useful with modification
Notes to teachers
Compare the difference in the intensity of the light at different locations on the represented Earth. Show other animations that depict the variation in intensity of sunlight in Earth's yearly orbit around the sun. Point out the inaccurate scale (size and distance).
Use this resource in conjunction with "Earth-Sun Geometry: Summer Solstice Animation".
Display the Resource