How Tidal Currents Happen

Tidal currents, as the...

Question

How Tidal Currents Happen

Tidal currents, as their name suggests, are generated by tides. Tides are essentially long, slow waves created by the gravitational pull of the moon, and to a lesser degree, the sun, on the Earth surface. Since the moon is so much closer to the Earth than the sun, its pull has more influence on the tides.

The moon's gravitational pull forces the ocean to bulge outwards on opposite sides of the Earth, which causes a rise in the water level in places that are aligned with the moon and a decrease in water levels other places. This rise in water level is accompanied by a horizontal movement of water called the tidal current.

Although tides and tidal currents don't have much impact in the open oceans, they can create a rapid current of up to 15.5 miles (25 kilometers) per hour when they flow in and out of narrower areas like bays, estuaries, and harbors. Fast tidal currents toss sediment around and affect plant and animal life. Currents also may transfer a fish's eggs from an estuary out into the open sea or carry nutrients that the fish needs from the sea into the estuary.

When the tide is rising and the flow of the current is directed towards the shore, the tidal current is called the flood current. When the fide is receding and the current is directed back out to sea, it is called the ebb current. Because the relative positions of the moon, sun, and Earth change at a known rate, tidal currents are predictable.

Source: http://britishcourse.com/

"Because the relative positions of the moon, sun, and Earth change at a known rate, tidal currents are predictable."

The above sentence from the text uses ....

A. simple past tense 
B. passive voice 
C. sequenced explanation 
D. cause and effect 
E. (A) and (B)

R. Catur · Accepted Answer

Halo Diandra, kaka bantu jawab ya.

Jawabannya adalah "D. cause and effect".

Pada soal kali ini, kamu diminta untuk menetukan tata bahasa pada kalimat "Because the relative positions of the moon, sun, and earth change at a known rate, tidal currents are predictable".

Kalimat tersebut artinya "Karena posisi relatif bulan, matahari, dan bumi berubah pada kecepatan yang diketahui, arus pasang surut dapat diprediksi".

Dari arti kalimat tersebut, bisa disimpulkan bahwa kalimat tersebut merupakan kalimat sebab-akibat, yang mana akibat yang disebutkan adalah arus pasang surut bisa diprediksikan karena ada penyebabnya yaitu posisi relatif bulan, matahari dan bumi yang berubah.

Jadi, sesuai dengan penjelasan, jawaban yang benar untuk soal kali ini adalah "D. cause and effect".

Semoga membantu ya.

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