Slide 1 / 111 Slide 2 / 111 2nd Grade Role of Water on Earth 2015-11-20 www.njctl.org Slide 3 / 111 Slide 4 / 111 Table of Contents: The Role of Water on Earth Earth's Water Click on the topic to go to that section Earth's Water · The Use of Maps · Water's Changing Forms · The Water Cycle · Unit Review · Return to Table of Contents Slide 5 / 111 Slide 6 / 111 Earth's Water Earth's Water All living things depend on water to survive. Look at the organisms below and describe why they Can you think of some need on water. examples of where water is found on Earth's surface?
Slide 7 / 111 Slide 8 / 111 Earth's Water Earth's Water Demo On Earth's How much of Earth's water can actually be used? surface, water can be Find out in this activity! found in: · oceans · lakes · ponds · rivers · glaciers Slide 9 / 111 Slide 10 / 111 Oceans Oceans An ocean is a large body of salt water that covers Can you see how all the oceans are connected? most of Earth's surface. Arctic Ocean Arctic Ocean Atlantic Ocean Pacific Ocean Pacific Ocean Indian Ocean Earth has five oceans but they are not actually separate. Southern Ocean They are all connected! Together these are called the World Ocean. You live closest to which ocean? Slide 11 / 111 Slide 12 / 111 Basins Lakes Can you cup your hands together, as if you are holding something? Lakes are large bodies of still water that form in a basin. Most lakes have freshwater in them, but a few have salt water. When you do this, your hands form a basin. Many bodies of water form in basins made from the Earth.
Slide 13 / 111 Slide 14 / 111 Lakes Ponds Many lakes are man-made. They are called reservoirs. Some cities use reservoirs to store water for later use. A pond is similar to a lake except that it is smaller and shallower. This is Gibson Reservoir in Montana. Slide 15 / 111 Slide 16 / 111 Ponds Rivers Ponds can occur naturally or can be man-made. Some animals, like beavers, also make ponds . A river is a moving stream of freshwater. Rivers flow into This beaver dam has oceans, lakes, created a pond in the ponds, or even other waterway. rivers. How is a river different from a lake or pond? Slide 17 / 111 Slide 18 / 111 The Mississippi River Where is Earth's Water? The Mississippi River is one of the largest rivers in the United States. It flows for about 2,500 miles. Most of Earth's water is in the oceans. Only a very small part is freshwater. Freshwater exists in Can you find it on the map? glaciers, lakes and rivers. It is even in the clouds! What other large rivers do you see on this map?
Slide 19 / 111 Slide 20 / 111 Review: Types of Bodies of Water Land Versus Water Activity All of the photographs below show different types of bodies of water. What is each body of water called? Is Earth covered by more land or more water? Click any photograph to find out. Catch the globe to find out! This is a river. It is This is a lake. It the Gambia river in is Lake Bled in Africa. Slovenia. This is an ocean. This is the Pacific This is a pond. ocean off the coast How could you of California. tell? Slide 21 / 111 Slide 22 / 111 1 The ocean is salty. 2 Most of the Earth is covered by Yes A land. No B ocean. C freshwater. Slide 23 / 111 Slide 24 / 111 3 The water in a river is still. 4 Which body of water is largest? A pond True B lake False C ocean
Slide 25 / 111 Slide 26 / 111 6 Which of the following is fresh water? (More than one 5 A _____ is smaller and shallower than a lake. answer may be correct.) A pond A river B lake B ocean C ocean D river C pond Slide 27 / 111 Slide 28 / 111 Slide 29 / 111 Slide 30 / 111 Bodies of Water Demo and Water Venn Diagram Activity The Use of Maps What are the differences and similarities between oceans, rivers, lakes and ponds? This demo and activity will show you. Return to Table of Contents
Slide 31 / 111 Slide 32 / 111 The Use of Maps The Use of Maps Maps show us information about a specific area. Maps can show the shapes and different kinds of land in an Look at this map of the United States. area, including different bodies of water. · What do the different colors mean? · How many different types of bodies of water can you find? What kinds of formations does this map show? Slide 33 / 111 Slide 34 / 111 The Use of Maps The Use of Maps Some maps show the depths of This is a 3-D map of landforms. the Atlantic Ocean. This map shows us a This is a map of a model of the land that South Pole glacier. lies beneath the ocean's surface. How would you describe the ocean floor? How deep is this glacier? Slide 35 / 111 Slide 36 / 111 7 Maps can show The Use of Maps A land forms. B bodies of water. This is a topographic map of the United Kingdom. It shows C elevation. the elevation of the land, with bodies of water in blue. D All of the above. What part of the United Kingdom has the highest elevation?
Slide 37 / 111 Slide 38 / 111 8 In maps, bodies of water are always shown in the color Landforms and Maps Activity A blue. What types of landforms can you see on a map? In this activity, you will make your own map. Be creative! B green. C brown. D yellow. Source: www.acsu.buffalo.edu Slide 39 / 111 Slide 40 / 111 Slide 41 / 111 Slide 42 / 111
Slide 43 / 111 Slide 44 / 111 Weather and Climate Weather is a short term Water's Changing description of the conditions in an area. Forms Climate is the average weather conditions for an area. Return to Table of Contents Antarctica's climate is the coldest on Earth. Slide 45 / 111 Slide 46 / 111 Water as a Solid Water as a Solid Different parts of the world have different climates. In some areas it is cold and snowy most of the time. In many colder climates, water exists as a solid (ice). Ice is the world's largest supply of freshwater. It covers about 3 percent of Earth's surface including most of Antarctica and Greenland. Slide 47 / 111 Slide 48 / 111 Glaciers Why do many colder climates have a lot of ice? A glacier is formed when Ice forms when temperatures fall below 32 degrees new snow falls on old Fahrenheit or 0 degrees Celsius. snow and all of the layers Think about this. are pressed together. Where do you keep ice Glaciers make up a lot of They have to be at your house? Click the the Earth's freshwater. put in a place that ice to find out. is really cold, like a freezer. Remember, ice freezes at 32 °F (0 °C) .
Slide 49 / 111 Slide 50 / 111 Water as a Liquid Where on Earth can you find liquid water? In parts of the world where the climate is warm and rainy, water exists as a liquid. Areas that are close to the equator have hot This is a photo of temperatures a rainforest in all year. Ecuador. It is hot and rainy most of the time. In these hot climates, most of the water exists as a liquid. Slide 51 / 111 Slide 52 / 111 Changing States of Water Changing States of Water During spring at this lake, temperatures reach above There are many parts of the world where the climate 32 °F (0 °C) and the water becomes a liquid. During changes depending on the season. In these areas, it is winter, temperatures fall below freezing and the lake the changing temperature during the different seasons turns to ice. that determines whether water is a liquid or a solid. Notice the different forms of water in this lake. Which photo has temperatures above 32 °F? The green areas in this map have variable seasons. Slide 53 / 111 Slide 54 / 111 Changing States of Water States of Water Activity This is a waterfall at Minnehaha Falls in Minneapolis, Minnesota. Each picture was taken during a different season. How does water change into different states? Find out in this activity! Can you guess which photo is each season?
Slide 55 / 111 Slide 56 / 111 9 When you listen to the news to see the temperature for 10 In what areas does water exist as a solid? the day, you are listening to the A Places that are very cold. A weather. B Places that are very warm. B climate. Slide 57 / 111 Slide 58 / 111 12 In what areas could you walk on water? (There can be 11 Earth's glaciers are beginning to melt. more than one answer.) Why might this be happening? A The Arctic A Earth is getting warmer. B A lake in a hot climate B Earth is getting colder. C A stream in the cold winter D A mountain glacier Slide 59 / 111 Slide 60 / 111 13 Where in the world can water exist as a liquid all year? 14 The solid form of water is called ________. A ice A Antarctica B liquid B Along the equator C water C the northern United States
Slide 61 / 111 Slide 62 / 111 16 To turn ice into liquid water, you must: 15 Where on Earth would you find bodies of water that change from a liquid to a solid during the year? A leave it in the freezer. B make it colder. A Places that have changing seasons C add heat. B Near Antarctica or the Arctic C Near the Equator Slide 63 / 111 Slide 64 / 111 Slide 65 / 111 Slide 66 / 111
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