A static change is a build-up of an electric charge in an object. A student can rub a balloon on her hair build-up an electric charge. Does the sketch show the charges before or after she has rubbed the balloon on her hair? explain how you know.

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.