☰ Contents · Natural science

Time, day and month; nature and the seasons

Lessons 20–21 · 2 lessons · Y.V. Malikova. Natural Science Grade 3, Part 1. Novda Edutainment, Tashkent, 2023; Y.V. Malikova. Natural Science Grade 3, Part 2. Novda Edutainment, Tashkent, 2023
21

How plants and animals depend on the seasons

Textbook: Part 1, pp. 90–93
GoalKnow how plants and animals adapt to the seasons: leaves falling in autumn, winter sleep, birds migrating and returning, life waking up in spring.
New words
hibernation (winter sleep) · qishki uyquwintering · qishlashpupa · g‘umbak
Explanation

In spring snow melts, seeds sprout and trees blossom. In summer plants grow fast, store food and leave seeds. In autumn annual plants ripen and the harvest is gathered; trees drop their leaves and prepare for winter. Fallen leaves protect the soil from freezing, and snow protects roots from the cold. Animals adapt too. In autumn insects hide in hollows and under bark, and caterpillars turn into pupae. Frogs, snakes and lizards sleep through winter. Swallows, storks and ducks fly to warm lands, while birds like rooks come from the north to spend winter here. Hares and squirrels grow thicker fur in winter. In spring birds return, build nests and raise chicks. The desert tortoise wakes in spring to eat greenery and goes back to sleep in the scorching summer.

Worked examples
Storks and swallows fly south in autumn and return in spring.
Squirrels and field mice hide stores of nuts and seeds in summer and autumn.
Class activity

“Four seasons” poster: divide a big sheet into four parts. For each season draw and write one change in a plant, an animal and in people’s lives (for example autumn: leaves fall, birds fly away, harvest in the garden).

Practice
1
Why do trees drop their leaves in autumn?
2
Which birds fly away to warm lands?
3
Name 3 animals that sleep through winter.
4
How does snow protect plant roots?