Best answer gets ! which table best shows the impacts resulting from human activity? a.) forest area cleared to construct an airport = increase in oxygen level a.) vegetation cleared to construct an oil mine = increase in pollution b.) forest area cleared to construct an airport increase in sound pollution b.) vegetation cleared to construct a power plant contamination of water c.) beehives cleared from urban areas = increase in vegetation c.) dams constructed on a river = increase in fish population d.) beehives cleared from urban areas = increase in bird population d.) dams constructed on a river = better quality of water

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?