Lesson 2 Earth’s Bodies of Water Social Studies Lesson 2 Earth’s Bodies of Water

Chapter 1 Lesson 2 Essential Question What are some different bodies of water and how are they formed?

tributary river system drainage basin rift reservoir trench current Vocabulary tributary river system drainage basin rift reservoir trench current tidal wave

Chapter 1 Lesson 2- Vocabulary Tributary- A smaller river that feeds into a larger river. River System- A network of a river and its tributaries. Drainage basin- The land that is drained by a river system.

Chapter 1 Lesson 2- Vocabulary

Chapter 1 Lesson 2- Vocabulary 4) Rift- A long deep valley with mountains or plateaus on either side. 5) Reservoir- a human-made lake

Chapter 1 Lesson 2- Vocabulary Trench- a deep ocean valley

Chapter 1 Lesson 2- Vocabulary Current- a giant stream of ocean water

Chapter 1 Lesson 2- Vocabulary Tidal Wave- a giant ocean wave

Do Now 10-10-13 On the back of your water cycle diagram, tell me the similarities and differences between evaporation and transpiration.

http://www. youtube. com/watch http://www.youtube.com/watch?v=u3QwLYfgwP0&list=PLC76BD77E9FF75375&index=9

A. The Water We Drink (Make sure you have this copied). 1. Earth’s ocean covers more than 140 million square miles. 2. The Earth’s oceans contain about 97% of all the water on Earth. 3. 99% of the total water supply is unsafe to drink. 4. Earth’s water cycle continuously replaces the supply of fresh water. 5. Most of the water humans use every day, about 80% of it, comes from surface water in freshwater rivers and lakes.

Streams Streams are bodies of water that flow over land Streams start in the high grounds such as hills and mountains. Streams are often formed by melted snowfields and glaciers, or overflowing lakes. Streams empty into larger water bodies through parts called mouths.

Rivers Rivers are mostly formed by wide streams or many streams joining together called tributaries. Rivers are found on every continent of Earth except Antarctica. The largest river is the Nile in Africa. It is 4,160 miles long. The Amazon is the largest river system. Rivers carry away water from land. Many of the world’s first settlements and civilizations developed along rivers. Rivers are a valuable source of energy. Rivers are important for trade and transportation.

Lakes The word “lake” means “hole” Lakes are created when water fills a hole or opening in Earth’s surface. Lakes exist on every continent except Antarctica. The greatest number of lakes are found in North America and northern Europe. Lake Baikal is the largest lake in the world North America has the most lakes in the world. The Great Lakes are the largest. Lakes can be made by humans who build dams to control rivers. They are called reservoirs.

Ocean Oceans cover much of the planet. (75%) The largest is the Pacific, then the Atlantic, Indian and Arctic. The Pacific is also the deepest. Oceans have mountain ranges, plains, basins, and valleys. Iceland is formed from a mountain in the Atlantic. Ocean currents are caused by winds. They move clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere. Ocean currents carry hot and warm water. The pull of the sun and the moon cause tides. Smaller bodies of water connected to oceans are called gulfs, bays, and seas.