Tes TOEFL Online

Melamar Kerja di BUMN

Mendaftar CPNS

Kelulusan S1, S2, & S3

Persyaratan Skripsi/Thesis

Tes TOEFL Online

Melamar Kerja di BUMN

Mendaftar CPNS

Kelulusan S1, S2, & S3

Persyaratan Skripsi/Thesis

Story

TRIK JITU MENGERJAKAN SOAL TOEFL(READING)DAN JAWABANNYA

19 November 2022 Materi Bahasa Inggris

        The atmosphere that originally surrounded Earth was probably much different from the air we breathe today.Earth’s first atmosphere(some 4.6 billion years ago)was most likely hydrogen and helium-the two most abundant gasses found in the universe-as well as hydrogen compounds,such as methane and ammonia,Most scientists feel that this early atmosphere escaped into space from the Earth’s hot surface.

        A second,more dense armosphere ,however,gradually enveloped Earth as gasses from molten rocks within its hot interior escaped through volcanoes and steam vents.We assume that volcanoes spewed out the same gasses then as they do today;mostly water vapor(about 90 percent),carbon dioxide(about ten percent),and up to afew percent nitrogen.These same gasses probably created Earth’s second atmosphere.

        As millions of years passed,the constant outpouring of gasses from the hot interior-known as outgassing-provided a rich supply  of water vapor,which formed into clouds.Rain fell upon Earth for many thousands or years,forming the rivers,lakes,and oceans of the world.During this Lime,large amounts of carbon dioxide were dissolved in the oceans.Through chemical and biological processes,much of the carbon dioxide became locked up in carbon sedimentary rocks,such us limestone.With much of the water vapor already condensed into water and the concentration of carbon dioxide dwindling,the atmosphere gradually became rich nitrogen.

        It appears that oxygen,the second most abundant gas in today’s atmosphere,probably began an extremely slow increase  in concentration as energetic rays from the sun split water vapor into hydrogen and oxygen during a process called photodissociation.The hydrogen,being lighter,probably rose and escaped into space,while the oxygen remained in the atmosphere.

        This slow increase in oxygen may have provided enough of this gas for primitive plants to evolve,perhaps two to three billion years ago.Or the plants may have evolved in an almost oxygen-free(anaerobic)environment.At any rate,plant growth greatly enriched our atmosphere with oxygen.The reason for this enrichment is that plants,in the presence of sunlight,process carbon dioxide and water to produce oxygen.


1.What is the main idea of the passage?

a.The original atymosphere on Earth was unstable.

b.The atmosphere on Earth has changed over time.

c.Hot underground gasses created clouds,which formed the Earth’s atmosphere.

d.Plant growth depended on oxygen in the Earth’s atmosphere.

2.The word”enveloped”in line 6 is closest in meaning to

a.surrounded

b.changed

c.escaaped

d.characterized

3.The word”they”in line 8 refers to

a.gasses

b.volcanoes

c.steam vents

d.rocks

4.According to the passage,outgassing eventually led to all of the following EXCEPT

a.increases in the carbon dioxide content of sedimentary rocks

b.the formation of bodies of water

c.decreases in the level of nitrogen

d.the formation of clouds

5.The word”gradually”in line 18 is closest in meaning to

a.accidentally

b.quickly

c.in the end

d.by degrees

6.The passage suggests that oxygen remained in the atmosphere because

a.it was caused by outgassing

b.it was heavier than hydrogen

c.hydrogen became trapped in limestone

d.rays from the sun created equal amounts of hydrogen and oxygen

7.The author uses the word”Or”in line 25 to

a.critize the previous suggestion

b.provide unrelated information

c.propose a similar idea

d.suggest an alternative

8.The phase”At any rate”in line 26 is closest in meaning to

a.regardless

b.in addition

c.although unlikely

d.fortunately

9.The author organizes the discussion of the Earth’s atmosphere in terms of the 

a.role of volcanoes in its formation

b.occur in which changes occurred

c.time it took for the Earth’s surface:to cool and nitrogen to appear

d.chemical and physical features of gasses

10.Which of the following does the passage mention as necessary for both the production of oxygen by photodissociation and production of oxygen by plants?

a.Water

b.Hydrogen

c.Carbon dioxide

d.Nitrogen      


Thank for reading TRIK JITU MENGERJAKAN SOAL TOEFL 2 DAN PEMBAHASANNYA in my blog.
reference:
BANK SOAL DAN STRATEGI TOEFL  

TRIK JITU MENGERJAKAN SOAL TOEFL 2 DAN PEMBAHASANNYA

                 
  

Komentari Status