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Exploring Earth's Water Distribution and Usage: Lab Activity

Dive into the fascinating world of Earth's water distribution in this engaging lab activity. Students will learn to describe and calculate the amount of water in oceans, rivers, lakes, groundwater, ice caps, and the atmosphere. By estimating and converting water volumes to percentages, they will grasp the significance of water cycling. Key questions guide their understanding, such as the fraction of Earth covered in water (70%) and the minute percentage of usable water (1%). A sketch of the water cycle and discussion on its importance for living organisms culminate this insightful experience.

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Exploring Earth's Water Distribution and Usage: Lab Activity

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  1. Water Water Everywhere Lab OBJECTIVES: Describe the amount and distribution of water on the Earth in oceans, rivers, lakes, groundwater, icecaps, and the atmosphere. Calculate water volumes using percentages.

  2. Materials MATERIALS: 1000 ml container (Fill with 1000 ml of water) 50ml graduated cylinder 2 Plastic droppers 3 - 10 ml graduated cylinders or beakers Food Coloring

  3. Copy this chart on your own paper

  4. Directions – Listen Carefully • Column 1: First determine the amount of water you would like to represent each of the 7 bodies of water (Based of 1000ml). • Column 2: Then convert to a percentage (your estimate/total) x 100 = % • Column 3 & 4: At the end I will give you the actual amounts to complete the table. From there you will rank them 1 representing the most water.

  5. Write Out Questions and Answer • What fraction of the earth’s surface is covered in water? • What percentage of all the Earth’s water is in a form that is useable to humans and land animals? • Is the amount of water on Earth always changing or is it a constant amount? • Produce a sketch of the water cycle. (Include vocabulary terms) • Provide at least two reasons why cycling of water is important to living organism. (Not they drink it)

  6. Actual Amounts

  7. Answers to Post Lab • What fraction of the earth’s surface is covered in water? 70% • What percentage of all the Earth’s water is in a form that is useable to humans and land animals? 1% • Is the amount of water on Earth always changing or is it a constant amount? Constant

  8. Answers to Post Lab

  9. Connections • Provide at least two reasons why cycling of water is important to living organism. (Not they drink it)….

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