Venture book

Presents simple experiments that demonstrate theories of light waves, diffraction, the effects of lenses, and reflection.

Relates the causes, events, and aftermath of the witchcraft trials which took place in Salem, Massachusetts, in the early 1690's and resulted in the deaths of more than nineteen people.

Discusses the causes of obesity, the health hazards it may cause, how society views obese people, and ways to control obesity.

Offers a variety of investigations, activities, and projects explaining how humans discovered Earth's position in the universe, and how we can find our own location using maps, compasses, the sun, and the stars.

Examines the societal structure among various animal species, such as wolves, sharks, penguins, ostriches, ants, and bees.

Discusses how common household items can become useful inventions, how many inventions were discovered accidentally, and how new products can be patented.

Explains how visual perceptions are processed and suggests how illusions can be produced with images and graphics.

Discusses sickle cell anemia, including the disease's history and the way it is passed on genetically from parent to child.

Photographs and text show medical research has made treatment for leukemia successful in many instances, and there is no reason to give up hope.

Experiments and activities reinforce a general discussion of the properties of light, the electromagnetic spectrum, and color vision, that also outlines the fifteen ways in which electron interactions result in color.