Answer:
Quartz is not pure in this rock.
Explanation:
When quartz shows effervescence in contact with an acid, it means that it is not in its pure state, but rather related to other substances that may be cementing the quartz. This effectiveness is caused by substances that do not react like quartz, such as calcite.
In this case, we can conclude that in relation to the calcium-rich rock shown in the question above, the calcium is not pure, but it is likely to be related to calcite, or other material that does not react to acid.
In the Gospel of John, Jesus is said to have performed seven miraculous signs that characterize his ministry, from changing water into wine at the start of his ministry to raising Lazarus from the dead at the end. For many Christians and Muslims, the miracles are actual historical events.
Yes aids had done more harm than good. The reason why because people in Africa didn't have aids and when aids started to spread around the whole world the Africa gotten so sick they started to die.
Answer:
Environment sciences:
Environment sciences is the study of environment in which we are living.In the environment science we are studying biological and physical information of the environment.
We have lots of choices to start build the career in the environment science .Some options are as follows
1.Teacher
2.Zoologist
3.Environmental engineer
4.Hydrologist
5.Environmental lawyer .
Along with lots of option are available to build a good career in the
environment sciences .
At collision they push together and then subduction(one plate going to the asthenosphere and becoming magma.).
