McGraw Hill
Arthropods
Are spiders related to crabs? Study the order of arthropods with a reading selection about animal diversity. It provides details about each class within the order, as well as vivid pictures and explanatory charts.
Other
Chicago Science Group: Earth's Changing Surface Virtual Field Trip
Join Science Companion author Belinda Basca and her family as they explore the land forms in Hawaii from a helicopter! Includes suggestions for teacher lessons, student activities, and web resources.
CK-12 Foundation
Ck 12: Life Science: 12.15 Biosphere
Understand Earth's biosphere which contains the lithosphere, hydrosphere, and atmosphere.
CK-12 Foundation
Ck 12: Life Science: 4.12 Geologic Time Scale
Understand the history of the Earth through geologic time.
CK-12 Foundation
Ck 12: Life Science: 4.11 First Cell
Learn about the first form of life on Earth, the cell.
CK-12 Foundation
Ck 12: Life Science: 12.34 Mass Extinction
Discover how mass extinctions play a part in Earth's life history.
CK-12 Foundation
Ck 12: Life Science: 4.4 Fossils
Understand fossils and the fossil record as it relates to Earth's history.
CK-12 Foundation
Ck 12: Life Science: 4.2 Influences on Darwin
Learn about Darwin's influences that led to his discoveries of change in species over time.
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