Why does the geography teacher say that the farther away we are from the sun, the hotter we get?

Some people think that the weather is cold because the sun is far away from us and hot because the sun is close to us. This view is wrong. In our country, it is a cold winter when the sun is close to the earth, and a hot summer when the sun is far from the earth.

The average distance between the sun and the earth is about one thousand kilometers, which is too far. The difference between the nearest distance and the farthest distance between the sun and the earth is only 5 million kilometers, so the distance between the sun and us has little to do with the weather. It is the angle of the sun that determines whether the weather is cold or hot. In summer, the sun shines directly in the northern hemisphere; In winter, the sun shines obliquely in the northern hemisphere. When the sun shines directly, the unit area receives more sunlight and more solar heat energy, so the weather is hot and the sun is oblique, so the unit area of the earth receives less sunlight and less solar heat energy, and the weather is cold.