☰ Contents · Natural science

The tongue and the skin: taste and touch

Lessons 7–8 · 2 lessons · O.E. Tigay, Y.V. Malikova. Natural Science Grade 2, Part 1. Novda Edutainment, 2023; O.E. Tigay. Natural Science Grade 2, Part 2. Novda Edutainment, 2023
8

Our sense of touch

Textbook: Part 1, pp. 27–28
GoalKnow about the sense of touch through the skin (hot–cold, smooth–rough, soft–hard, pain) and that skin warns us of danger.
New words
skin · terismooth · silliqrough · dag‘alpain · og‘riq
Explanation

Our skin has very tiny sensitive points that we cannot see. They tell the brain whether what we touch is smooth or rough, hot or cold, soft or hard. The skin also warns us of danger: if we touch something hot, we feel pain and pull our hand away. In the cold we shiver and hurry somewhere warm.

Worked examples
Cotton is soft, stone is hard, glass is smooth, brick is rough.
If a hand touches icy water, the skin reports “cold!”.
Class activity

“Mystery bag” game: put safe objects in a cloth bag (cotton, soft toy, pencil, pebble, soap, spoon). A child feels with a hand without looking and names the object, explaining why: “Soft, so it’s cotton”. Safety: do not include sharp or breakable items.

Practice
1
With which organ do we feel whether something is smooth or rough?
2
What happens if we touch a hot kettle?
3
Give 2 examples each of soft and hard things.