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:
step-by-step explanation: true.
Answer:
It is partially true, "life finds a way" but human activities have already made some irreversible damage to the world.
Explanation:
In a Hypotethic scenario in which Humans are extinct nature Will eventually, start succession processes in urban areas and after many years depending on the erosional resistance of the materials nature will erase many of the buildings around the world ( 500 years for metal). Water bodies will eventually decontaminate trough the water cycle and be filled with organisms, contamination due to petrol can also be reverted through natural chemical processes with oxygen.
But human activities like mining are irreversible, for the earth, it is impossible to recover its shape, the materials already extracted and soil nutrients that ran out due to the use of chemicals.
The acceleration of the climate change due to human activities is for sure the biggest wound we have made to the world, this is an irreversible acceleration to a natural process.
Answer:(1) to assess the current status of the preservation of this unique and high valuable archaeological site, (2) to analyze the various actions that cause the destruction of the pyramid complex, in particular the weathering activities and strong seismic event, and (3) to determine the geochemical and engineering properties for construction materials using different types of tools and advanced analytical and diagnostic techniques.
Explanation:
The beginning of the Precambrian<span> period starts with the formation of Earth about 4.5 billion years ago and ends at the first sign of complex life about 540 million years ago. Though the </span>Precambrian<span> Period is often referred to as a period, it's actually the only supereon, which means that it spans multiple eons. The Precambrian is known as the geologic era. The Precambrian is the 1st era. hope that helped</span>
