Which of the following represents a way in which humans have positively impacted Earths air and water? A) Land has been set aside for parks and wilderness areas that allow human use while preserving natural habitats.

B) Erosion

C) Global warming

D) Burning of fossil fuels

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.