9) Which of the following is not a source of our atmosphere? comets
plants
animals
solar radiation
outgassing from volcanoes

[fw.02]sinkholes are often formed as a result of the actions of. a.heat on recharge b.pressure on aquifers c.acid in groundwater d.minerals in hot springs

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons

The body paragraphs in an informative essay should include clear examples. a thesis statement. restated evidence. a clear direction.