South America is also home to some of the driest parts on earth like Lima, Peru. Using your knowledge, describe why there is a tropical rainforest that receives a lot of precipitation and Lima is still extremely dry from the same air mass moving across the continent. This should be multiple sentences. [Word Bank: air mass, humid, elevation, rising, clouds, sinking, rain, dry, wind/air movement]

Waste water from industries and domestic sources can be treated by chlorination or ultraviolet radiation. there are pros and cons to using either chlorine or uv radiation to kill harmful microorganisms. what is one reason chlorination would be preferred over ultraviolet radiation? a) chlorine only eliminates visible impurities and is ineffective against microorganisms. b) chlorine not only kills bacteria but provides a residual effect on returning microorganisms. c) uv radiation can be used only to treat drinking water and is ineffective in treating waste water. d) ultraviolet radiation is more effective

1. beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. for each time point in the cycle you select, state the following: • whether the atria and ventricles are contracting or relaxing • whether the av valves and semilunar valves are closed or open • whether the pressure in the atria and ventricles is high or low

If blood is in short supply which blood type would be the most beneficial to have on hand if someone needed a blood transfusion?