krit.club logo

Sensory Organs and Communication - Sharing Our Feelings: Understanding Senses

Grade 3CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

•

Our body has five sense organs: Eyes (Sight), Ears (Hearing), Nose (Smell), Tongue (Taste), and Skin (Touch).

•

The Skin is the largest sense organ and helps us feel sensations like heat, cold, and pressure. For example, we can feel if water is 0∘C0^{\circ}C (ice) or 100∘C100^{\circ}C (boiling).

•

The Tongue has different taste buds to identify Sweet, Sour, Salty, and Bitter flavors.

•

People who cannot see use the 'Braille Script,' which consists of raised dots arranged in a 2×32 \times 3 grid pattern to read by touching.

•

Sign Language and facial expressions are used by people who are hearing or speech impaired to communicate their feelings.

•

In classical Indian dance, hand gestures called 'Mudras' and facial expressions called 'Bhavas' are used to convey emotions and stories.

•

Communication is the act of sharing our feelings and thoughts through words, signs, or gestures.

📐Formulae

Sense Organs+Nerves→Brain=Perception\text{Sense Organs} + \text{Nerves} \rightarrow \text{Brain} = \text{Perception}

Communication=Speech+Gestures+Facial Expressions\text{Communication} = \text{Speech} + \text{Gestures} + \text{Facial Expressions}

Braille Cell=2 columns×3 rows of dots\text{Braille Cell} = 2 \text{ columns} \times 3 \text{ rows of dots}

💡Examples

Problem 1:

Ravi is blindfolded. He is given a rose. Which sense organs will he use to identify that it is a flower and that it has thorns?

Solution:

He will use his Nose and his Skin.

Explanation:

He will use his nose to smell the fragrance of the rose and his skin (touch) to feel the sharp texture of the thorns.

Problem 2:

If a person cannot hear sounds, what are two ways they might communicate with you?

Solution:

  1. Sign Language, 2. Written notes or Lip-reading.

Explanation:

People with hearing impairments use visual cues like hand signs and lip movements to understand and share information.

Problem 3:

While eating an orange, Priya noticed it was both sweet and sour. Which organ helped her, and what was the stimulus?

Solution:

The organ used was the Tongue. The stimulus was the chemical taste of the orange.

Explanation:

The tongue contains taste buds that react to different chemicals in food to identify flavors.