In Sweden the title psychologist is restricted in law. It can only be used after receiving a license from the government. The basic requirements are a completed five years specialised course in psychology (equivalent of a master's degree) and 12 months of practice under supervision.
Because the earth's axis is tilted. It is all about the tilt of the Earth's axis. Many people believe that the temperature changes because the Earth is closer to the sun in summer and farther from the sun in winter. In fact, the Earth is farthest from the sun in July and is closest to the sun in January! During the summer, the sun's rays hit the Earth at a steep angle.
The axis of the Earth is tilted, which means that in summer we (in the UK) are leaning towards the Sun. As we travel around the Sun, we begin to tilt away and it becomes winter. Have a look at this clip to see how the Earth's tilt changes the seasons. This is why when we have winter, Australia has summer. Imagine having Christmas dinner on the beach! But not all countries have seasons. Countries near to the equator - the line which goes round the middle of the earth - have very mild seasons. The weather stays almost the same temperature all the year round.