Which statement is true about the temperature and density of air? A. The temperature and density of air are not related.
B. Lower temperature air is less dense.
C. The less air there is the higher the temperature and density.
D. Lower temperature air is more dense.

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Fertility and mortality rates are higher in more developed nations.

Since 1980, which three countries have either attacked or been attacked by iraq? a. iran, turkey, united states b. iran, israel, jordan c. iran, kuwait, united states d. iran, saudi arabia, egypt