If you mean a "random" long sentence, then how about:
The class studied the geography of the Fertile Crescent all week, but then began to read about the region around it.
He made a careful study of the geography of the province.
We were studying geography in school.
Studying geography helps us understand the physical features and human interactions of different regions around the world.
i will say "I read a book a book about geography because I had a trip to mojave desert"How was that sentence?
Yes, you do capitalize the word "geography" because it is part of the title.
In general, the word "geography" is not capitalized unless it is the first word in a sentence or part of a title.
the study of people, places and the earth
Studying geography helps us understand how environments shape human societies and cultures.
Not usually. 'Geography' is not a proper noun, but of course it follows the standard capitalization rules.
Physical geography is the study of Earth's natural features, such as mountains, rivers, and climates.
Example sentence - He had no idea how long it would be before the crime was discovered.
Example sentence - The long held tenet would prove difficult to remove.