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Table of Contents

1

Investigation 1: Water Observations

3

A Report from the Blue Planet

3

Surface Tension

6

Which Way Does It Go?

8

Opinion and Evidence

10

Water Everywhere

14

Investigation 2: Hot Water, Cold Water

16

Vacation Aggravation

16

Celsius and Fahrenheit

20

Water: Hot and Cold

21

Ice Is Everywhere

24

Investigation 3: Weather and Water

30

Studying Weather

30

Drying Up

37

Surface-Area Experiment

39

Condensation

41

The Water Cycle

44

Investigation 4: Seasons and Climate

48

Climate Regions

48

Wetlands for Flood Control

55

Conserving Water during Droughts

61

Investigation 5: Waterworks

63

Water: A Vital Resource

63

Natural Resources

68

Ellen Swallow Richards: An Early Ecologist

73

Making Drinking Water Safe

77

Using the Energy of Water

83

References

90

Science Safety Rules

90

Glossary

91

Index

94