Why might mercury have such extreme temperatures relative to those on earth?

The side of Mercury facing the sun is very hot, about 800° Fahrenheit! But the dark side gets very cold, about –280° Fahrenheit, with no sun to warm it and no atmosphere to hold in the heat.

It’s closer to the sun

For the sat there is a reading test, math test, and a writing and language test. the act has social studies and science tests.