Question

although the sun is far away in space, it lights up earth. explain look at the photo of the sun and earth. why is part of earth light and part of earth dark? start typing...

Explanation:

The sun is a light source. Earth is a sphere that rotates. As it rotates, different parts face the sun (lit) or are turned away (dark).

Answer:

Earth is a sphere that rotates. The part facing the sun is lit; the part turned away is dark.