“ when developing a model of the cycling water between the land, ocean and atmosphere ,one must include the force of the propel the water .for the model ,this versus would be which of the following A - River , streams , and tribunes

B- The polar ice caps and ocean

C-plants , animals , and human activity

D- The suns radiation and gravity”?

What is the approximate circumference of the circle shown below? 12.2 cm

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle