grade 9 science

Temperature is strongly influenced by the angle at which radiation enters the atmosphere

the reason that we have seasons is because of the tilt of the Earth's axis by 23.5 degrees.

Seasons affect by the hours of daylight.

The Earth's rotation tilt to the plane of rotation with the sun has an effect on the hours of daylight, consequently they create the seasons.

When the Northern Hemisphere is tilted away from the sun, the length of the day is shorter (Winter). And when the Northern Hemisphere is tilted away from the sun, the Southern Hemisphere is tilted toward the sun and the days there are longer (Summer).

Six months later, the opposite is true. The Northern Hemisphere is tilted toward the sun (Summer), and in the Southern Hemisphere the Earth is tilted away from the sun (Winter).

The equinoxes are where the Earths tilt is perpindicular to the plane of rotation--effectively there is not tilt to or away from the sun in either Hemisphere, and the days in both Hemispheres is one half a rwvolution (12 hrs).

Here's an additional question. What is the affect of latitude on the length of a day in the summer and winter? In other words, if you were in the Northern Hemisphere and you went farther North in summer would the hours of daylight be longer or shorter? What would happen if you went North in Winter?

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