Question

look at the model showing earth at one point in its orbit around the sun.
use the model to complete the sentence.
southern hemisphere northern hemisphere
at this point in earths orbit, the is in winter, and the is in summer.

Explanation:

The Earth's seasons are determined by the tilt of its axis and its orbit around the Sun. When one hemisphere is tilted away from the Sun, it experiences winter (less direct sunlight). When a hemisphere is tilted towards the Sun, it experiences summer (more direct sunlight). In the given model, the Northern Hemisphere is in the dark (night - time) but also, based on the Earth's axial tilt and the position relative to the Sun's rays (assuming a vernal or autumnal equinox - like position for simplicity, but the key is the concept of hemisphere - Sun relationship), if we consider the general rule. The hemisphere that has less exposure (in terms of the model's representation of light - dark and the Earth's tilt implications) for winter. The Southern Hemisphere, if we assume the model's light rays are coming from the left (as in a common diagram where the Sun is on the left), the Southern Hemisphere would have more direct sunlight (summer) and the Northern Hemisphere less (winter).

Answer:

At this point in Earth's orbit, the Northern Hemisphere is in winter, and the Southern Hemisphere is in summer.