6 The Best of the Fair

16 Space

The universe is your laboratory! Learn how astronomers study the skies. How far does the universe extend? What does it contain? How can you put your knowledge of the universe to practical use?

18 Solar power

20 Living in space

22 Finding stars

24 Dynamic Earth

Earth seems eternal, but it is changing-----sometimes dramatically-----every day. Study the way earthquakes and volcanoes can reshape the landscape in minutes. Examine the effects of weathering and erosion. Finally, consider the ways humans impact their planet.

26 Wind direction

28 Shifting plates

30 Rocks

34 Soil

36 Machines and Structures

Engineers use science to design and build airplanes, ships, bridges, towers, and domes. Learn how engineers master the difficult task of creating structures that must carry huge loads, last for many years, and be pleasant to look at. See if you can design strong, efficient machines and structures.

38 Submarines

40 Airfoils

42 Boats

44 Bridges

46 Power of shapes

48 World of Plants

Explore the vital world of plants. The oxygen that humans breathe comes from plants, and most of the food we eat comes from plants or animals that eat plants. Study the oxygen cycle, plant life, the diversity of species and their habitats, and the many fascinating uses we have for plants.

50 Classifying plants

54 Plant growth

58 Decay

60 Natural dyes

64 Sound

Sound can blow out candles and crack glass. Bats use sound to "see" in the dark to find their way around. Investigating sound can be fun and exciting. Find out how sounds travel through the air, through walls, and around corners. How can it be captured and recorded? What makes a room soundproof?

66 Reflecting sound

68 Traveling sound

70 Recording sound

72 Radio waves

74 Scope and sequence

76 Glossary

79 Index

80 Find Out More