When they are different temperatures and are in contact.
A lot of schools do have English classes but it is not a requirement.
Answer:
True.
Explanation:
When the southern hemisphere is tilted towards sun, it is summer in the southern hemisphere and winter in the northern half of Earth, while on the other hand, if the northern hemisphere is tilted towards the sun, there is summer season in the southern hemisphere and winter in the northern hemisphere. When the earth's axis is more or less perpendicular to the incoming rays of the Sun this will leads to the spring and autumn season in some locations of the earth.
