The area of earth science that examines the physical and biological changes that have occurred in earth’s past is called

astronomy
meteorology
physical geology
historical geology

History Geology

Explanation:

Geology is one of the Earth sciences. It studies the earth's crust, the matter that composes it, its formation mechanism, the changes that occur on it and the structure that its surface has. Geology was essential to determine the age of the Earth, which was estimated to be about 4.6 billion years old, and to develop the theory called plate tectonics.

Geology is a science that is divided into several categories. One of these categories is called historical geology, which refers to the study of eras, periods and geological ages. In other words, historical geology is the area of geology that examines the physical and biological changes that have occurred in the Earth's past.

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.