During a hike in Utah's Zion National Park, you pick up a sedimentary rock sample. When you examine the sample with your hand le
ns, you see that the rock consists mainly of rounded glassy particles that appear to be quartz. To be sure, you conduct two basic tests. When you check for hardness, the rock easily scratches glass, which is what quartz would do. However, when you place a drop of acid on the sample, it fizzes. Explain how a rock that appears to be rich in quartz could effervesce with acid.
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.
c. The inter-tropical convergence zone is associated with a migratory band of high pressure cells, bringing moderate precipitation to low-latitude areas.
Explanation:
The relationships with the high and low-pressure areas and the average annual rainfall are associated with the divergence and the convergence of the air along the ITCZ zone and are formed by the migration of the pressure cells that bring moderate to heavy rainfall in lower latitudes.
Imagine that the arable land is scarce then people will compete for land in competition will be big this means that it is more likely to be able to find smaller pieces of land for it is likely that the size of the House and farms will be small
