Answer:
some commonly and naturally occurring chemicals are <u>sodium, potassium and lithium</u>
Explanation:
- The most commonly found water-reactive mineral or chemical found are list above as these are commonly found abundant in nature and most of these elements some heavy metals are found throughout the artificial sources.
- Some substances react with water to produce heat such as flammable hydrogen gases Sodium is a naturally and artificially indirect form of a chemical element that is mixed with water sop as to produce the desired reaction on the object.
- Lithium is a colorless substance found in water forming a basic solution. Potassium is also a tasteless colorless and odorless substance that is dissolved in water and is known for the vital forms of life.
The scientists that are concerned about increased carbon dioxide in the atmosphere believe global warming is caused by human actions.
Explanation:
The global warming is a fact, but there is a big debate about the main causes of it. On one side are the scientists that believe that the human actions are the main cause of the global warming, on the other side are the scientists that believe it is strictly a natural process, and in the middle are the scientists that believe it is caused by both the human actions and the natural processes.
The scientists that believe that the global warming is caused by the human actions often discount the natural processes and their importance. The human actions increase the effect of the natural processes, but lot of scientists tend to exaggerate the human effect. If the trend of carbon dioxide input into the atmosphere by the human activity at this rate, then in the future it will most probably became a very important factor, while for now is relatively low when compared to the natural processes.
The majority of the carbon dioxide from the human activities comes from:
- burning of coal
- combustion of oil
- burning of wood
This is mainly done through:
- industry
- transportation
- agriculture
- heating of homes
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The appropriate answer is a. the temperature is high enough but pressure low enough to melt iron. The earth's core is composed of two layers; the inner and outer core. Both layers are composed mainly of iron and nickel. The main difference between the two layers is that the inner core is solid and the outer core is liquid. The inner core is solid because of the pressure created by the overlaying layers; the outer core, mantle and the crust. The inner core is however hotter than the outer core.
The distribution of ancient fossils, Rock and mountain ranges, Climate zones
Answer:
Geomorphological processes and resultant topography are related with glacial, aeolian, fluvial and ground water movement.
- Outwash plain: <em>deposited mostly by water from melting glaciers.</em>
- Sand dunes: <em>not related to glaciation</em>
- Offshore bar: <em>not related to glaciation</em>
- Moraine: <em>deposited by glaciers</em>
Explanation:
Each and every geomorphological process has three types work. For e.g. erosional work, transportational work and depositional work.
- Outwash plain produced by fluvio-glacial depositional work where firstly glaciers melt and then the water flows and deposits sediments in a flat area.
- Moraine produced by glacial deposition. Glaciers carry sediments (pebbles, cobbles) and when it deposits in the valley floor it results a distinguished landform i.e. moraine.
- Sand dunes produced by aeolian action (depositional work). When wind receives obstacle in the form of tree or stone in its way it deposits sand in desert area and produce sand dunes.
- Offshore bar produced by marine processes. when sediments deposited in the coastal area in a huge quantity and friction take place between the wave and sea floor it creates offshore bar.
