Earthquakes and volcanoes
Explains how earthquakes and volcanic eruptions result from the building up of pressure which begins far below the earth's surface
Profil penulis
Laurence Santrey
3 karya publik ditemukan.
2018: 3
Conservation and Pollution
Explains how the growth of industry in modern times has brought about the pollution of air, water, and land, as well as the depletion of natural resources, and emphasizes the importance of conservation.
Thomas Jefferson
A biography of the versatile American known for his accomplishments as inventor, architect, musician, diplomat, scientific farmer, political philosopher, author of the Declaration of Independence, and President of the United States.