When you start from a given set of rules and conditions and determine what must be true you are using blank reasoning

The district of columbia could be eliminated completely if a majority of congress voted in favor of the action. a. true b. false

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