Broekel, Ray

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Dangerous fish

1982
Photographs and brief text introduce piranhas, sharks, stonefish, electric catfish, and other dangerous marine animals.

Maps and globes

1983
Briefly discusses different types of maps and globes and explains such map-related terms as symbol, key, direction, and scale.

Storms

1982
Describes the weather conditions that produce storms and the damage that can be done by rain, snow, wind, dust, ice, thunder, lightning, and hail.

Animal observations

1990
Discusses the behavior and the habitats of different kinds of animals and what can be learned by observing birds, mammals, insects, and other kinds of wildlife.

Experiments with air

1988
Presents experiments which demonstrate the properties of air.

Sound experiments

1983
Briefly discusses sound, pitch, sound travel, sound waves, vibration, frequency, length, and thickness, with simple experiments to demonstrate each concept.

Experiments with water

1988
Presents experiments which demonstrate the properties of water.

Experiments with straws and paper

1990
Illustrates some basic principles of science, based on experiments and tricks using straws, paper, drinking glasses, and coins.

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