Answer:
One that “Can be answered by conducting an experiment”
Explanation:
Sources of water pollution on building sites include: diesel and oil; paint, solvents, cleaners and other harmful chemicals; and construction debris and dirt. When land is cleared it causes soil erosion that leads to silt-bearing run-off and sediment pollution. Silt and soil that runs into natural waterways turns them turbid, which restricts sunlight filtration and destroys aquatic life.
Surface water run-off also carries other pollutants from the site, such as diesel and oil, toxic chemicals, and building materials like cement. When these substances get into waterways they poison water life and any animal that drinks from them. Pollutants on construction sites can also soak into the groundwater, a source of human drinking water. Once contaminated, groundwater is much more difficult to treat than surface water.
A rainbow is an occurrence of a continuous spectrum. Rainbows happen when sunlight passes into raindrops and reflects off the back of them. As the light exits the raindrop, it is refracted at different angles according to its wavelength.
