Answer:
The movement of carbon from the atmosphere to the lithosphere ( rocks ) begins with rain. Atmospheric carbon combines with water to form a weak acid ( carbonic acid ) that falls to the surface in rain. The acid dissolves rocks - a process called chemical weathering and releases calcium, magnesium, potassium, or sodium ions.
Explanation:
Geologists have recently determined that the minerals goethite and hematite exist in abundance on Mars, sure signs of the presence of water (see Figure 1 for a picture). None of those geologists have been to Mars, of course, but the unmanned rovers Spirit and Opportunity have. These rovers are equipped with three mass spectrometers, each of which is capable of determining the chemical composition of a solid with a high degree of accuracy. With such a precise chemical analysis in hand, geologists on Earth had no problem identifying the minerals.
A mineral is defined in part by a specific chemical composition. In theory, therefore, it is always easy to identify a mineral, if you can determine the chemical composition with a mass spectrometer like the Mars rovers. In reality, however, even if you are looking at rocks on Earth, determining the exact chemical composition of a substance involves significant time preparing the sample and sophisticated laboratory equipment (and often significant money). Luckily, it is usually unnecessary to go to such lengths, because there are much easier ways that require little more than a magnifying lens and a penknife.
A sky map is created by astronomers to identify, name, and plot celestial objects it is a map of the sky made by dividing the celestial sphere into 88 different areas.
GNH has been devised by Bhutan as an alternative indicator for GDP as a tool to measure progress or development. The level of GNH for an individual and for Bhutan as a country are determined through measures in nine domains. ... Living standards are measured through the indicators household income, assets, and housing.
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Multicellular organisms e.g. man meet their needs through use of specialized systems that they have in their bodies. Examples of such include:
1. cardiovascular system composed of heart, veins and arteries which facilitate transport of nutrients to all parts of the body .
2. Skeletal system composed of bones, joints, ligaments and cartilage whose function is support and protection of the body.
3. Digestive system composed of mouth, esophagus, stomach , small and large intestines whose function is breakdown of food and absorption of nutrients.
