The Earth is constantly spinning on its axis, like you might spin a basketball on your finger. It is this spinning of the Earth that causes

The spinning of the earth around its own axis causes day and night.

Explanation:

Earth has two types of motions. It spins around its own axis causing day and night every 12 hours and completes a rotation in 23.93 hours that make a full day. The part of the earth that faces sunlight during spinning experiences day and the other part has night. It also rotates around the sun and completes one rotation in 365 days that makes a year.