Tugas 3 Softskill

Article of Global Warming

Throughout its long history, Earth has warmed and cooled time and again. Climate has changed when the planet received more or less sunlight due to subtle shifts in its orbit, as the atmosphere or surface changed, or when the Sun’s energy varied. But in the past century, another force has started to influence Earth’s climate: humanity

How does this warming compare to previous changes in Earth’s climate? How can we be certain that human-released greenhouse gases are causing the warming? How much more will the Earth warm? How will Earth respond? Answering these questions is perhaps the most significant scientific challenge of our time.

What is Global Warming?

Global warming is the unusually rapid increase in Earth’s average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels. The global average surface temperature rose 0.6 to 0.9 degrees Celsius (1.1 to 1.6° F) between 1906 and 2005, and the rate of temperature increase has nearly doubled in the last 50 years. Temperatures are certain to go up further.

Despite ups and downs from year to year, global average surface temperature is rising. By the beginning of the 21st century, Earth’s temperature was roughly 0.5 degrees Celsius above the long-term (1951–1980) average. (NASA figure adapted from Goddard Institute for Space Studies Surface Temperature Analysis.)

Earth’s natural greenhouse effect

Earth’s temperature begins with the Sun. Roughly 30 percent of incoming sunlight is reflected back into space by bright surfaces like clouds and ice. Of the remaining 70 percent, most is absorbed by the land and ocean, and the rest is absorbed by the atmosphere. The absorbed solar energy heats our planet.

As the rocks, the air, and the seas warm, they radiate “heat” energy (thermal infrared radiation). From the surface, this energy travels into the atmosphere where much of it is absorbed by water vapor and long-lived greenhouse gases such as carbon dioxide and methane.

When they absorb the energy radiating from Earth’s surface, microscopic water or greenhouse gas molecules turn into tiny heaters— like the bricks in a fireplace, they radiate heat even after the fire goes out. They radiate in all directions. The energy that radiates back toward Earth heats both the lower atmosphere and the surface, enhancing the heating they get from direct sunlight.

This absorption and radiation of heat by the atmosphere—the natural greenhouse effect—is beneficial for life on Earth. If there were no greenhouse effect, the Earth’s average surface temperature would be a very chilly -18°C (0°F) instead of the comfortable 15°C (59°F) that it is today.

The enhanced greenhouse effect

What has scientists concerned now is that over the past 250 years, humans have been artificially raising the concentration of greenhouse gases in the atmosphere at an ever-increasing rate, mostly by burning fossil fuels, but also from cutting down carbon-absorbing forests. Since the Industrial Revolution began in about 1750, carbon dioxide levels have increased nearly 38 percent as of 2009 and methane levels have increased 148 percent.

Source : http://earthobservatory.nasa.gov/Features/GlobalWarming/page2.php

Discussion of Sentence          :

1.       How will Earth respond?

This sentence include to simple future tense, especially in interrogative sentence.

Simple Future tense : S + Will + V1 ± O

Interrogative sentence : Question Words   +  Auxiliary  +  Subject   +       V1        ± O 

                                             How           +     Will        +    Earth    +    respond ?

2.       Earth’s temperature begins with the Sun.

This sentence include to simple present tense.

Simple present expresses daily habits or usual activities. The simple present also expresses general statements of fact. This sentence include to general statement of fact.

Simple present tense :                  S                              +              V1                          ±             O

                                                Earth’s temperature       +             begins                   +    with the sun

3.       Humans have been artificially raising the concentration of greenhouse gases

This sentence include to Present Perfect Progressive.

Present Perfect Progressive       : Subject (I,You,We,They) / (He,She,It)                   +   Have/Has   +                  Been                +             V-Ing     ±            O

                                                Humans             +             Have      +          Been     + artificially raising                   + the  concentration of greenhouse gases.

How to Write Complex Sentence

More and more candidates for better paying jobs are now required to submit writing samples as part of the interview process. Many applicants with strong verbal skills fail to make the second round of interviews because of their poor writing samples. Frequently, the problems are not unity or coherence, or even inadequate vocabulary/word choice. All too often, poor writers are categorized as such because they only write in simple or compound sentences. A few tips on how to improve writing, using complex sentences will get you through to that second round of interviews.

A Few Definitions and Examples

A simple sentence has a noun (person, place, thing, or idea), a verb (mental or physical action or “to-be” verb—is, am, are, was, were, be, being, been), and the rest of the sentence (known as the complement).

Example: John ran down the street.

A compound sentence combines two simple sentences with a conjunction (a connecting word such as and, but, or so).

Example: John ran down the street, and he saw the crime take place.

A complex sentence has an independent clause and at least one dependent clause. An independent clause means that there is a noun and a verb that express a complete thought. A dependent (subordinate) clause means that there is a noun and a verb that do not express a complete thought.
Example:
Ty completed all his chores (independent clause) + after eating his lunch (dependent clause) = Ty completed all his chores after eating his lunch.

How to Form Complex Sentences

Complex sentences can help define the relationship between complicated ideas and will make your writing more specific and interesting to read. Learn how to improve writing by adding dependent clauses to the beginning, middle, or end of your simple or compound sentences. Oh, by the way, if starting a sentence with a dependent clause, always follow the clause with a comma.

Dependent Clauses   

To improve writing, add adjective clauses, which describe nouns or pronouns. Transitions beginning adjective clauses include who, whose, on (for, of) whom to refer to people, that to refer to people or things, and which to refer only to things.

Example: whose work is well-known

To improve writing, add adverbial clauses, which describe describe an adjective, an adverb, or verb. Transitions beginning adverb clauses include after, although, as, as if, as long as, as much as, as soon as, as though, because, before, even if, how, if, in order that, once, since, so that, than, though, unless, until, when, whenever, where, wherever, whether, and while.

Example: as long as she can wait

To improve writing, add noun clauses, which describe are used as a subject, a complement (the rest of the sentence besides the subject and predicate), or as the object of a preposition. Transitions beginning noun clauses include that, what, whatever, which, whichever, who, whoever, whom, and whomever.
Example: whatever he demands

Source : http://www.edarticle.com/article.php?id=656