When coming to building something, some materials are more vulnerable to water and can wear away easier. Some can keep the water in, so depending on the material, the water quality can be better sustained.
Answer:
The answer is A.
Explanation:
To test if the selenium from the mine has an effect on the fish living in the lake which i assume is close to the mine, testing the tissue of the fish from that lake and comparing it to the selenium levels of the fish from a nearby lake would be a testable hypothesis because there is a comparable aspect and there should be a difference in the numbers between the fish from the two lakes because of their distance to the mine.
I hope this answer helps.
I found this photo, i hope it helps
not gonna lie, this is more of an answer you'd have to answer yourself. It seems like an easy question just think about it. If you're a scientist in a drought, think about places where youd be able to get water. Some plants produce water as well. Soil holds water, Even under normal climatic conditions, about 90 per cent of the precipitation is said to be released back into the atmosphere.
Answer:
A. increases by a factor of 3
Explanation:
