Essays Tagged: "chemical composition"

Analytical Chemistry

Analytical Chemistry is the branch of chemistry principally concerned with determining the chemical composition of materials, which may be solids, liquids, gases, pure elements, compounds, or ... s, which may be solids, liquids, gases, pure elements, compounds, or complex mixtures. In addition, chemical analysis can characterize materials but determining their molecular structures and measurin ...

(4 pages) 116 0 4.1 Jan/1996

Subjects: Science Essays > Chemistry

It is called Global Hoax? A realistic view of global warming.

past two decades. But, is this attributable to human activities? Have human activities altered the chemical composition of the atmosphere through the buildup of greenhouse gases ? primarily carbon di ... es in our landfills, raising livestock, natural gas pipelines, and coal, as well as from industrial chemicals and other sources.So, if this is such a big problem, why has so little been done? Mainly b ...

(3 pages) 173 1 3.8 Nov/2002

Subjects: Science Essays > Environmental Science

Enhanced greenhouse effect on global warming.

-27 degrees C.The earth's climate is predicted to change because human activities are altering the chemical composition of the atmosphere through the buildup of greenhouse gases. Those gases are prim ...

(3 pages) 183 0 2.7 Nov/2002

Subjects: Science Essays > Environmental Science

Global Warming Assignment "Summary"

e day, keeping thetemperature from getting to high. Over the past 100 years, humans have altered thechemical composition of the earth's atmosphere through the buildup of greenhouse gases,therefore res ...

(1 pages) 108 1 2.5 Mar/2004

Subjects: Science Essays > Environmental Science

The structure and composition of the atmosphere

planet's magnetic fields. The atmosphere absorbs the energy from the Sun, recycles water and other chemicals, and works with the electrical and magnetic forces to provide a moderate climate. The atmo ... pace.Four distinct layers have been identified using thermal characteristics (temperature changes), chemical composition, movement, and density. These are:The troposphere which starts at the Earth's s ...

(2 pages) 118 4 4.8 May/2004

Subjects: Science Essays > Environmental Science

Climate and Global Warming

rming over the last 50 years is attributable to human activities. Human activities have altered the chemical composition of the atmosphere through the buildup of greenhouse gases - primarily carbon di ... ollutants discharged into the atmosphere. It is generally characterized by the following factorsThe chemical or physical identity of the pollutants included,The geographic area covered,The institution ...

(7 pages) 299 0 5.0 May/2004

Subjects: Science Essays > Atmospheric Sciences

Global warming

rming over the last 50 years is attributable to human activities. Human activities have altered the chemical composition of the atmosphere through the buildup of greenhouse gases - primarily carbon di ...

(2 pages) 49 1 1.9 Sep/2004

Subjects: Science Essays > Earth Sciences

Global Warming

this warming over that past 50 years is due to human activities. Human activities have changed the chemical composition of the atmosphere through the increase in the atmosphere of greenhouse gases su ...

(1 pages) 54 0 3.0 Nov/2004

Subjects: Science Essays > Environmental Science

Global Warming

t of the warming over the last half-century was caused by humans. Human activities have changed the chemical composition of the atmosphere through the buildup of greenhouse gases. Greenhouse gases are ...

(2 pages) 51 0 3.8 Dec/2004

Subjects: Science Essays > Environmental Science

The Building Blocks of Biology

r. Be sure to explain how this bond works.In science, a molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. A molecule consists o ... n and properties. A molecule consists of two or more atoms joined by shared pairs of electrons in a chemical bond. It may consist of atoms of the same chemical element, as with oxygen (O 2), or of dif ...

(2 pages) 16 0 3.0 Apr/2005

Subjects: Science Essays > Biology

Biology HSC Notes - Maintaining a Balance

rse)Topic 1: Maintaining a BalanceEnzymesThe Role of EnzymesEnzymes role is to maintain the rate of chemical activity in an organism. They are biological catalysts, increasing the rate of reaction in ... ctions to occur at lower temperatures, which means that body temperatures do not have to be so high.Chemical CompositionEnzymes are specialised large proteins, which are composed of chains of amino ac ...

(16 pages) 128 1 3.3 Aug/2005

Subjects: Science Essays > Biology

Global Warming.

st century will be significantly larger than in the 20th century. Human activities have altered the chemical composition of the atmosphere through the buildup of greenhouse gases - primarily carbon di ...

(3 pages) 62 0 3.0 Dec/2005

Subjects: Science Essays > Earth Sciences > Geography

Measurement of the structure and composition of the Earth's atmosphere

planet's magnetic fields. The atmosphere absorbs the energy from the Sun, recycles water and other chemicals, and works with the electrical and magnetic forces to provide a moderate climate. The atmo ... -energy radiation and the frigid vacuum of space.Remote sensing instruments are used to measure the chemical composition, movement of the atmosphere and density. These instruments are usually located ...

(4 pages) 34 0 0.0 May/2006

Subjects: Science Essays > Earth Sciences > Meteorology

Global Warming

over the last fifty years is attributable to activities of human. Human activities have changed the chemical composition of the atmosphere and environment through the buildup of greenhouse gases, whic ... rming over the last 50 years is attributable to human activities. Human activities have altered the chemical composition of the atmosphere through the buildup of greenhouse gases - primarily carbon di ...

(12 pages) 129 1 3.8 May/2007

Subjects: Science Essays > Environmental Science

Global Warming

t of everyday life. Global warming is a phenomenon caused by human activities that are altering the chemical composition of the atmosphere through the buildup of greenhouse gases, mostly composed of c ...

(2 pages) 40 0 0.0 Apr/2001

Subjects: Science Essays > Environmental Science

Mineral Deposits

s. The minerals in a mineral deposit are not carbonaceous; i.e., they do not contain electron-rich (chemically reduced) carbon. Coal is an example of a carbonaceous deposit. Coal is a fossil fuel rath ... lue of most mineral deposits does not depend as much upon the mineralogy of the deposit as upon the chemical composition of the deposit, i.e., the concentration of valuable elements within the deposit ...

(1 pages) 1773 0 0.0 Sep/2001

Subjects: Science Essays > Chemistry

Biology HSC Syllabus - Maintaining A Balance (All Dot Points Answered)

within a limited temperature range:•Identify the role of enzymes in metabolism, describe their chemical composition and use a simple model to describe their specificity in substrates:-Role of enz ... escribe their specificity in substrates:-Role of enzymes in metabolism:Metabolism refers to all the chemical reactions occurring in organismsEnzymes are biological catalysts which increase the rate of ...

(25 pages) 85 0 4.7 Jun/2007

Subjects: Science Essays > Biology

Maintaining a Balance

ctive in a limited temperature range1.1. identify the role of enzymes in metabolism, describe their chemical compositions and use a simple model to describe their specificity on substratesRole of Enzy ... describe their specificity on substratesRole of Enzymes: enzymes are organic catalysts which cause chemical reactions to proceed which could not normally occur under normal conditions found in cells. ...

(15 pages) 50 0 0.0 Jan/2008

Subjects: Science Essays > Biology > Plant Biology

Diamonds

the stable form of carbon, found at the earth's surface. Despite the fact that they have identical chemical composition, the two minerals are drastically different. Diamond is the hardest known subst ...

(5 pages) 24 0 5.0 Feb/2008

Subjects: Science Essays > Earth Sciences

An Emerging Use Of Mass Spectrometry

mass-to-charge ratio. Mass spectrometers are used to identify atoms and isotopes and determine the chemical composition of a sample. Although many different kinds of mass spectrometers are in use tod ... number of applications. These applications include detection of drug abuse, food contamination, and chemical/biological warfare agents.References "Aston, Francis." (1978). In World Book Encyclopedia ( ...

(4 pages) 11 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry