The two minerals that are found in cement are : Silica and calcite.
<u>Explanation:</u>
Different minerals form the composition of cement but the minerals that are most commonly found in cement are calcite which is contained in the limestone.
The other mineral that is used in the production of cement is silica in the form of raw rock type used to make cement which is found in clay. So they form an important part of formation of cement.
Answer:
Subducting forces played a crucial role in formation of the islands.
Explanation:
- These are known as the formation of Archipelago. Many thousands of islands that constitute the philippine island are an Icelandic arc and volcanic in origin.
- That is supposed to have been formed after the subduction of plates that collided together such as the Eurasian plate, Philippine Sea, and the Indo Australian plate.
- Being made up of 7,000 island groups. countries situated around the pacific ring of fire. Consist of 11 small islands while the rest are large islands that cover 90% of the surface area of the philippine plate and Luzon alone covers about 40,541 square miles.
- The original Icelandic arcs are known to have been colloidal earlier with the Sundaland forming a series of Archipelago. Melting of molten lava in the earth's crust leads to the formation of a series of chains that are seen today as the philippine islands.
Answer:
Bigger cities have more opportunities, have a more developed public sector that pays more and have more frequent economic activity.
Explanation:
- <u>Difference between public and private sectors</u> – some regions have a stronger public sector and a bigger need for it, and the wages in the private sector are generally lower. The recession affected the private sector very much in 2008, and also the skills and occupations needed are not the same. <u>The cities and towns which have more need for public sector employees tend to generally have higher average pay.</u>
- <u>Economic activity </u>– the large cities, like London, have higher economic activity and processes. The network that a person in the city creates is wider than people in rural areas,<u> which means the individual spends more and earns more to cover the expenses.</u>
- <u>Companies and investors are more attracted to bigger cities </u>– the investors are likely to place money and start the business in London than smaller towns, and therefore will create more job opportunities and economic processes. <u>High-paying companies will first look into the prospects of starting a company in an area that is populated and has more economic activity.</u>
