Chapter 1: Super Senses
कैसे पहचाना चींटी ने दोस्त को? (सुपर सेंसेज)
Don't Let a 20-Minute Bubbling Delay Cost You CTET Qualification
In offline CTET exams, bubbling 150 bubbles takes 18 to 22 minutes of mechanical time. A single misaligned row can trigger an 8-question domino error. Practice bubble-filling this chapter's solved MCQs inside Mentora's official OMR simulator.
- Sloth sleep cycle: 17 hours/day hanging upside down; lives ~40 years; changes tree once a week.
- Eagle, Kite, and Vulture visual range: Can see 4 times further than humans (8m vs 2m).
- Silkworm smell sensitivity: Identifies female from several kilometers away by pheromones.
- Ant navigation: Leaves scent (chemical) trail on the ground that following ants trace.
- Tiger sensory acuity: Whiskers detect air vibrations; roar heard up to 3 km; night vision 6x human.
- Snakes have no external ears; they perceive sound solely through ground vibrations.
- Trap: CBSE claims sloths sleep 22 hours or live 20 years. Correct: Sloths sleep 17 hours and live 40 years.
- Trap: CBSE claims vultures see 2 times further. Correct: Birds of prey (Kites, Eagles, Vultures) see 4 times further.
- Trap: CBSE claims snakes hear the charmer's Pungi through air. Correct: Snakes are deaf to airborne sound; they respond to pungi movement and ground vibrations.
NCERT Core Facts: Animal Super Senses (Direct CTET Statements)
In NCERT Class 5 EVS Chapter 1, animals are shown to possess sensory capabilities far exceeding human thresholds. CBSE constructs multi-statement MCQs directly from these paragraphs:
1. Ants and Chemical Trails
- Ants move in single lines because the leading ant deposits a chemical scent trail on the ground.
- When you block their path with a pencil, following ants climb over the pencil or immediately locate the path using antennae to smell the trail.
- Guard ants recognize ants from their own anthill exclusively through distinctive colony scent.
2. Mosquitoes and Insects
- Mosquitoes locate humans in complete darkness by:
- a.The smell of the human body and natural body odor.
- b.The smell of the soles of your feet.
- c.The heat (infrared temperature radiation) of your body.
- Silkworm (रेशम का कीड़ा): The male silkworm can locate its female mate from several kilometers away solely through her specialized scent.
3. Birds of Prey (Vision Benchmark)
- Kites, Eagles, and Vultures can see things from four times the distance humans can see.
- Example: An object visible to a human eye from 2 meters is clearly visible to a vulture or eagle from 8 meters.
- Most birds have eyes on either side of their heads, enabling them to focus on two distinct objects simultaneously. When looking straight ahead, both eyes focus on the single target.
- Because most birds cannot rotate their eyeballs, they must repeatedly turn their entire necks to scan their surroundings.
4. The Sloth (CBSE's Favorite Character)
5. Tigers and Forest Predators
- A tiger can see 6 times better at night than most humans.
- A tiger's whiskers (मूंछें) are exceptionally sensitive; they sense movements and air vibrations, assisting the tiger in hunting in absolute darkness.
- A tiger's ears can rotate in different directions to capture sounds from all angles.
- A tiger can distinguish between the rustling of leaves caused by wind and the movement of an animal on grass.
- The roar of a tiger can be heard up to 3 kilometers away.
- Tigers demarcate their individual territory with their urine, which other tigers detect instantly.
6. National Parks & Wildlife Sanctuaries in CTET
NCERT Chapter 1 highlights critical protected habitats created to preserve endangered animals:
- Jim Corbett National Park: Located in Uttarakhand.
- Ghana Bird Sanctuary (Keoladeo National Park): Located in Bharatpur district, Rajasthan.
- In these protected areas, hunting animals or destroying vegetation is strictly illegal and punishable under the Wildlife Protection Act.
Test Your Mastery: Super Senses
Authentic CBSE exam questions tested directly from this NCERT chapter.
Consider the following statements about a 'Sloth': (A) It looks like a bear and spends almost 22 hours a day sleeping. (B) It lives for about 40 years and during this time moves around only 8 trees. (C) It eats leaves of the same tree on which it lives. Which of the above statements is/are correct?
'स्लोथ' के विषय में निम्नलिखित कथनों पर विचार कीजिए: (A) यह भालू जैसा दिखता है और दिन में लगभग 22 घंटे सोता है। (B) यह लगभग 40 वर्ष जीता है और लगभग 8 पेड़ों पर ही घूमता है। (C) यह उसी पेड़ की पत्तियां खाता है जिस पर रहता है। सही कथन चुनिए:
A group of birds that can see things from four times the distance we can see is:
पक्षियों का वह समूह जो हमसे चार गुना अधिक दूरी से वस्तुओं को स्पष्ट देख सकता है:
Which of the following national parks is located in Uttarakhand as mentioned in NCERT Class 5 EVS?
एनसीईआरटी कक्षा 5 ईवीएस के अनुसार कौन सा राष्ट्रीय उद्यान उत्तराखंड में स्थित है?
How many hours does a sloth sleep per day according to NCERT Class 5 EVS?
According to NCERT Class 5 EVS Chapter 1, a sloth spends approximately 17 hours a day sleeping while hanging upside down from a tree branch. It has a lifespan of about 40 years and moves around only 8 trees in its entire lifetime.
Which birds can see four times further than human beings in CTET?
Kites, Eagles, and Vultures can see four times further than humans. What humans can see from a distance of 2 meters, these birds can clearly observe from 8 meters away.
How do snakes hear music or the Pungi in CTET exams?
Snakes do not have external ears and cannot hear airborne sounds. They sense sound vibrations transmitted through the ground and respond to the physical movement of the snake charmer's instrument.