Choose two key factors in the production of soil. A. Farming
B. Weathering
C. Erosion
D. Plant growth

Name one type of data that h-r diagrams do not show.

Which of the following is a measure of the amount of light a star directly emits? a. luminosity b. wavelength c. brightness d. intensity

What statement about the economy of france is not true? a. paris is a major manufacturing center b. marseille is a busy seaport on the mediterranean coast c. farming is the major activity in the alps. d. world-famous wines are produced in the bordeaux region c. farming is the major activity in the alps