Reading Mastery Assessment
Student Booklet • Form A
Reading Comprehension
Form ID: RC-A26
Total Time: 45 Minutes
Student Name:
Date:
Teacher / Class:
Your Task
- Read the informational passage carefully before answering.
- For Part A, fill in the bubble completely for each correct choice.
- For Part B, write clearly in complete sentences with text evidence.
Keep Track
Passage: Living Vibrations
Part A: Questions 1–4
Part B: Questions 5–6
Reading Selection Informational Text
Living Vibrations: The Ground Language of Elephants
By Dr. Elena Vance
[1] Deep across the African savannah, a herd of elephants suddenly halts in unison. Their massive ears fan forward, heads tilt downward, and front feet press firmly against the red soil. To a human observer, the vast plain appears completely silent. Yet beneath the dry earth, a powerful message is traveling at hundreds of meters per second.
[2] Elephants communicate using infrasound—low-frequency acoustic waves that plunge far below the threshold of human hearing. When an elephant produces an infrasonic rumble in its vocal cords, the sound vibrates not only through the atmosphere, but also ripples into the ground as seismic waves. These ground vibrations can travel up to ten miles, far exceeding the reach of sounds traveling through gusty air.
[3] To detect these subterranean signals, elephants rely on sensitive vibration detectors called Pacinian corpuscles packed inside the cushions of their feet and trunk tips. When a seismic rumble arrives, the nerve endings convert pressure waves into nerve impulses that travel straight to the elephant's brain. This biological telegraph warns family groups of distant predators, incoming thunderheads, and nearby watering holes.
Part A: Multiple Choice Questions 1–2 of 4
1. According to paragraph 2, what gives seismic signals an advantage over airborne sounds on the savannah?
A) They can be heard easily by human ears.
B) They travel further without wind disruption.
C) They scare predators away instantly.
D) They produce light that guides the herd.
2. What is the primary function of the Pacinian corpuscles mentioned in paragraph 3?
A) To cool the elephant's body during hot afternoons.
B) To dig water wells in parched riverbeds.
C) To detect ground tremors and relay signals to the brain.
D) To generate infrasonic rumbles in the throat.
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Reading Comprehension • Form A
Student Name:
Page 2 of 2
Part A: Multiple Choice (Continued) Questions 3–4 of 4
3. In paragraph 3, the author compares the elephant's communication system to a "biological telegraph." What does this comparison emphasize?
A) The physical weight of the animal's limbs.
B) The rapid, long-distance transmission of coded data.
C) The metal-like strength of the elephant's tusks.
D) The difficulty elephants face when sharing messages.
4. Based on paragraph 1, how do elephants physically prepare their bodies to detect seismic vibrations?
A) They trumpet loudly and run in circles.
B) They fan their ears back and raise their trunks.
C) They stop, fan ears forward, and press feet to the soil.
D) They lie flat on the ground to sleep.
Part B: Written Response
Support your answers with evidence from the text
5. Explain why human observers cannot hear the infrasound rumbles produced by elephants.
2 Points
6. Describe two survival benefits that subterranean communication provides to elephant herds traveling across the open savannah.
4 Points
End of Form A: Review your work and confirm all questions are answered.
Scoring:
Part A: / 4
Part B: / 6
Total: / 10
