In which era and period did layers of sandstones form

The contour interval of a topographic map is 25 feet, and every fifth line is an index contour. What is the difference in elevation between index contours? A. 25 feet B. 100 feet C. 125 feet D. 175 feet

Demographers are scientists who study

How do geologists use index fossils to determine the age of rock strata?

Which of the following arrangements of planets is in order from the longest time to orbit the Sun to the shortest time?

Judaism, Christianity, and Islam all originated in the Middle East. True or false

Which describes how Islam came to exist in Africa? A. Arabs brought it in the 8th century. B. Christianity started in Africa. C. Europeans brought it within the last few hundred years. D. Southeast Asians brought it in the 14th century.

What resources are located in the taiga

Why is geography important as a field of study

Life in earths biosphere is limited by all of the following except? a. temperature b. sea level c. animals d. nitrogen

What is the most common miniral in West Africa