1 00:00:10,349 --> 00:00:20,070 rivers. Rivers have tributaries. A tributary is a small river that flows 2 00:00:20,070 --> 00:00:30,230 into a big river. The source of a river is where it begins. River begins in the 3 00:00:30,230 --> 00:00:40,130 mountain. The start of a river is narrow and flows quickly. The mouth of the river 4 00:00:40,130 --> 00:00:54,909 is where it ends and flows into a sea, ocean, lake or other river. The mouth of the river is wide and moves slowly. 5 00:00:54,909 --> 00:01:07,189 meseta is in the center of spine. The evera flows into the mediterranean sea. 6 00:01:07,189 --> 00:01:12,069 The hermeneutic is a truth of data.