Which of these actions is an example of chemical weathering?
freezing water widens the cracks in rocks.
plant roots force their way into cracks in rocks and break them.
oxygen in air reacts with iron content in rocks, causing them to change color.
strong winds peel soft rock away, leaving harder rock behind.

Which two statements regarding graduated driver licensing are true? select all the correct answers. gdl new drivers gain skills under low-risk conditions. gdl new drivers gain skills under high-risk conditions. gdl laws are the same across states. gdl laws vary across states. gdl does not need parental supervision and coaching.

Collect sales taxes issue drivers licenses operate public schools all of these are responsibilities of what level of government? a) city government b) state government c) county government d) national government

Sandra lives in the heart of a large city. lately, there have been robberies on several of the streets near where sandra lives but none on her street. sandra and her neighbors believe that they have not seen any crime on their street because they know each other, notice when strangers or strange cars are in the neighborhood, and have a mix of old retired couples and young families who use the neighborhood at different times of the day. jane jacobs would see this as an example of: