Two students are sitting in a park looking at a street that is 50 meters away. They hear two different sounds. First they hear a siren from an ambulance that is on the street. The siren is very loud. Next they hear a dog barking that is on the sidewalk next to the street. The barking dog is quiet compared to the siren. The students discuss why the siren is louder than the dog. Which statement is correct?

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !