Will give 30 ! 1. how did the ecosystem around the muskegon river change around 1900? 2. how had the ecosystem around the muskegon river changed by 1950? 3. what is only now showing up in the muskegon river? how can researchers know where this pollution came from?

Give reason sugarcane waste can be recycled into useful products

As water is cooled from 4 c to 0 c its density

If you could drill a hole straight to the center of the earth, and keep track of what the hole is going through, youwould find: a) you would go through one sort of material, and then a different, denser material, and then a still-different, still-denser material, because the planet is made of concentric layers, sort of like an onion. b) you would go through one sort of material all the way to the center, because the planet is all mixed up. c) if your hole started at the north pole, you would go through different layers of different materials, but ifyour hole started at the equator, you would go through one sort of material all the way to the center. d) if your hole started at the equator, you would go through different layers of different materials, but if yourhole started at the north pole, you would go through one sort of material all the way to the center. e) you would strike diet pepsi when you got to the center.