=== The Grin Goes Like a Crescent Moon ===
This passage is adapted from the novel Rich in Love by Josephine Humphreys. In this selection, after finding an old Halloween costume, the narrator is confronted with past memories.
=== The Myth and the Machine ===
This passage is adapted from Lewis Mumford's work The Myth and the Machine: Technics and Human Development. This passage notes the relationship between hunting and the development of imaginative art during the Paleolithic era.
=== Women Poets of the World ===
This passage is adapted from Women Poets of the World by Rob Swigart. This passage explains how women from the Heian Period helped to shape Japanese literature.
=== Natural Acts ===
This passage is adapted from David Quammen's Natural Acts: A Sidelong View of Science and Nature. In this selection, Quammen describes the unusual attributes of the sea cucumber.
=== Water Balance Studies ===
A water company pumps water from a lake to supply several communities, providing measurements of pumping rates to geologists who investigate total inflow and outflow of the lake.
=== Dinosaur Footprints ===
Geologists perform studies on dinosaur footprints to estimate the type, size, speed, and gait of ancient dinosaurs based on modern animals.
=== Electrical Resistance of Metals ===
Tables summarize the resistance of aluminum and copper wires to determine how diameter and temperature affect their resistance.
=== Chemical Reactions of Salts ===
Observations of reactions between metal nitrate solutions and various X2- ions, determining the formations of precipitates based on solubility.
=== Pendulum Experiments ===
Experiments conducted to determine how mass, wire length, and angle of initial displacement affect the period of a pendulum.
=== Mineral Requirements for Plants ===
A table detailing essential minerals for flowering plants, their functions, and the quantities needed to grow 100 bushels of corn.
=== Evolutionary Hypotheses ===
Comparative analysis of rock layers and fossils to understand gradualism and episodic evolution, with insights into climate impacts on species evolution.