All Clear Signal Reading Answers

Nov 14, 2024

All Clear Signal Reading Answers is an academic reading answers topic. All Clear Signal Reading Answers has a total of 13 IELTS questions in total. In the questions set,you have to choose the correct option from given passages. In the next section you have to fill in the blanks with correct answers.

The IELTS Reading section is a crucial component of the IELTS exam, designed to assess a candidate's ability to comprehend and analyze different types of passages. In this passage, you will engage with a series of IELTS reading practice questions that simulate real test scenarios. These questions are aimed at improving your skills in identifying key ideas, extracting specific information, and making inferences. Whether you are preparing for the Academic or General Training module, practicing these IELTS reading questions will help you become familiar with the format and boost your confidence for the actual test.

Section 1

ALL CLEAR SIGNAL

A. A tsunami is a large ocean wave that is caused by sudden motion on the ocean floor. This sudden motion could be an earthquake, a powerful volcanic eruption, or an underwater landslide. The impact of a large meteorite could also cause a tsunami. Tsunamis travel across the open ocean at great speeds and build into large deadly waves in the shallow water of a shoreline. Most tsunamis are caused by earthquakes generated in a subduction zone, an area where an oceanic plate is being forced down into the mantle by plate tectonic forces. The friction between the subducting plate and the overriding plate is enormous. This friction prevents a slow and steady rate of subduction and instead the two plates become "stuck".

B. As the stuck plate continues to descend into the mantle the motion causes a slow distortion of the overriding plate. The result is an accumulation of energy very similar to the energy stored in a compressed spring. Energy can accumulate in the overriding plate over a long period of time, decades or even centuries. Energy accumulates in the overriding plate until it exceeds the frictional forces between the two stuck plates. When this happens, the overriding plate snaps back into an unrestrained position. This sudden motion is the cause of the tsunami - because it gives an enormous shove to the overlying water. At the same time, inland areas of the overriding plate are suddenly lowered. The moving wave begins traveling out from where the earthquake has occurred. Some of the water travels out and across the ocean basin, and, at the same time. water rushes landward to flood the recently lowered shoreline. Tsunamis travel swiftly across the open ocean.

C. Fishers and boaters have special concerns if a tsunami occurs. If you receive warning of an approaching tsunami produced by a distant earthquake while at sea, head for a depth of 50 fathoms (300ft) or more and monitor your radio for more information from port authorities or the Coast Guard. If you are in port, you may choose to head to deep water or haul-out your boat if there is time to safely do so, or leave your boat moored and evacuate to higher ground. If a Cascadian earthquake triggers a local tsunami while at sea, head for a depth of 50 fathoms (300 ft) or more and monitor your radio for more information. Be prepared to be at sea for an unknown amount of time. If you are in or near port, protect yourself during the earthquake shaking and then immediately leave your vessel and head to high ground (>50 ft) or inland. Multiple tsunami waves may arrive for many hours after the earthquake so do not return to low-lying coastal areas, ports or harbors until emergency officials indicate an "All Clear" signal. That 1964 event w a s the most recent significant tsunami to reach the Washington coast, but recent geologic investigations indicate that large tsunamis have struck our coast many times in the last few thousand years

D. On the Pacific Coast, from southern British Columbia to northern California, people and property are at risk both from distantly and locally generated tsunamis. Recent studies indicate that about a dozen very large earthquakes (with magnitudes of 8 or more) have occurred in the Cascadia subduction zone west of Washington. Computer models indicate that tsunamis waves generated by these local events might range from 5 to 55 feet in height and could affect the entire coastal region. When an earthquake that might generate a Pacific Coast tsunami is detected, the Alaska Tsunami Warning Center calculates the danger to the northeast Pacific Coast and notifies the communities at risk. Those warnings may give people a few hours to prepare and evacuate (depending on the distance to the earthquake). If the earthquake occurs off our coast, however, there may be no time to send out hazard warnings. The first waves could arrive within minutes of the earthquake. The only tsunami warning might be the earthquake itself.

E. In order to plan for hazards, citizens need to know what to expect. In the last few years, there have been significant advances in understanding the earthquakes that have occurred on the Cascadia subduction zone and the tsunamis that have struck the Pacific Coast. This information is the foundation for planning efforts. In order to form successful mitigation strategies local planners and emergency managers need to know what has worked and what has not. In the last few years, many organizations and communities have addressed these issues. Those experiences can help others to formulate the best possible plans for the coastal communities.

Questions 29-33

Choose the correct heading for paragraphs, A-E from the list of

headings below. Write the correct number, lix.

29. Paragraph A

Answer: IV

Supporting statement: “.......A tsunami is a large ocean wave that is caused by sudden motion on the ocean floor... Most tsunamis are caused by earthquakes generated in a subduction zone........”

Keywords: floor, earthquake

Keyword Location: para A, Lines 1-4.

Explanation: The paragraph primarily discusses the causes of a tsunami, focusing on events such as earthquakes, volcanic eruptions, and underwater landslides. This justifies the heading, "Why Tsunami occur?"

30. Paragraph B

Answer: VI

Supporting statement: “.......As the stuck plate continues to descend into the mantle... This sudden motion is the cause of the tsunami........”

Keywords: motion, energy

Keyword Location: para B, Lines 1-6

Explanation: The paragraph provides a scientific explanation of how the distortion of tectonic plates and their subsequent snapping back causes giant waves, aligning with the heading.

31. Paragraph C

Answer: I

Supporting statement: “.......Fishers and boaters have special concerns if a tsunami occurs... If you are in port, you may choose to head to deep water........”

Keywords: Precautions, head

Keyword Location: para C, Lines 1-5

Explanation: The paragraph gives specific instructions and safety precautions for fishers, boaters, and the general population when a tsunami threat is imminent, fitting the heading "Precautions to defend oneself from Tsunami."

32. Paragraph D

Answer: IX

Supporting statement: “........When an earthquake that might generate a Pacific Coast tsunami is detected, the Alaska Tsunami Warning Center calculates the danger... Those warnings may give people a few hours to prepare and evacuate.......”

Keywords: warning, evacuate

Keyword Location: para D, Lines 5-8

Explanation: This paragraph outlines the detection and protective measures in place for tsunamis, like calculating risks and notifying communities, which corresponds to "Measures to detect and protect people from tsunami."

33. Paragraph E

Answer: III

Supporting statement: “.......In the last few years, there have been significant advances in understanding... In order to form successful mitigation strategies........”

Keywords: planning, coastal

Keyword Location: para E, Lines 2-5

Explanation: The paragraph is about planning and implementing mitigation strategies based on recent studies and data, which is why "Successful mitigation strategies" is the best heading.

LIST OF HEADINGS

i. Precautions to defend oneself from Tsunami

li. Experience of fishers and boaters

iii. Successful mitigation strategies

iv. Why Tsunami occur?

v. Earthquake calculations

vi. Scientific explanation of cause of giant waves

vii. Giant waves- Tsunami

viii. Destructions caused by big waves

ix. Measures to detect and protect people from tsunami

Questions 34-36

Write the correct letters in boxes 34-36 on your answer sheet.

The article suggests that the reason of Tsunami is sudden motion

on the ocean floor. The THREE sudden motions highlighted could be-

A. Plate tectonic force

B. Landslide

C. Deadly waves

D. Volcanic eruption

E. Earthquake

F. Fictional forces

Q.34

Answer: B

Supporting statement: “........A tsunami is a large ocean wave that is caused by sudden motion on the ocean floor... an underwater landslide.......”

Keywords: landslide, sudden

Keyword Location: para A, Lines 1-2.

Explanation: The text explicitly mentions that an underwater landslide is a cause of tsunamis, making this a correct choice for one of the sudden motions.

Q.35

Answer: D

Supporting statement: “........This sudden motion could be an earthquake, a powerful volcanic eruption.......”

Keywords: eruption, sudden

Keyword Location: para A, Line 2

Explanation: A volcanic eruption is directly linked to the cause of tsunamis, making it a valid selection.

Q.36

Answer: E

Supporting statement: “.......Most tsunamis are caused by earthquakes generated in a subduction zone........”

Keywords: Earthquake, subduction

Keyword Location: para A, Lines 4-5.

Explanation: Earthquakes are the primary cause of tsunamis, particularly in subduction zones, which justifies selecting this answer.

Questions 37-39

Complete the following table according to the given passage.

Choose NO MORE THAN TWO WORDS to complete the table.

EVENT/INFORMATIONS	PLACE
1964, most significant Tsunami reached	(37)............... coast
People and property are at threat due tovaguely and nearby generated Tsunami	(38).............. coast
Latest studies point towards that about a dozen very outsized earthquakes have taken place in the	(39)............... subduction zone

Q.37

Answer: WASHINGTON

Supporting statement: “........That 1964 event was the most recent significant tsunami to reach the Washington coast.......”

Keywords: tsunami, Washington

Keyword Location: para C, Line 9

Explanation: The passage indicates that the 1964 tsunami reached the Washington coast, so the correct entry for the table is "Washington."

Q.38

Answer: PACIFIC

Supporting statement: “.......On the Pacific Coast... people and property are at risk both from distantly and locally generated tsunamis.........”

Keywords: Coast, risk

Keyword Location: para D, Line 1

Explanation: The paragraph specifies that the Pacific Coast faces threats from tsunamis, both local and distant, making "Pacific" the correct answer.

Q.39

Answer: CASCADIAN

Supporting statement: “.......Recent studies indicate that about a dozen very large earthquakes... have occurred in the Cascadia subduction zone........”

Keywords: zone, earthquakes

Keyword Location: para D, Line 3

Explanation: The passage discusses the occurrence of significant earthquakes in the Cascadia subduction zone, making it the appropriate answer for this part of the table.

Questions 40

Write YES, NO OR NOT GIVEN for the following statement.

YES - If the statement agrees with the information

NO - If the statement contradicts the given inform

NOT GIVEN - if there is no information on this at all

40. Alerting the communities at risk may give people a few hours to leave.

Answer: YES

Supporting statement: “........Those warnings may give people a few hours to prepare and evacuate (depending on the distance to the earthquake).......”

Keywords: hours, evacuate

Keyword Location: para D, Lines 7-8

Explanation: The passage clearly states that warnings can give people time to prepare and evacuate, confirming the statement as "YES."

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