GoalKnow how plants help nature and people (oxygen, food, protecting soil, raw materials, greening cities) and examples of city trees.
New words
oxygen · kislorodraw material · xom ashyoplane tree · chinorelm · qayrag‘och
Explanation
Plants take in carbon dioxide and release the oxygen we breathe. They give people food, animals fodder and birds shelter. From plants we get wood, fibre, cloth, paper and medicines. Roots hold the soil firmly and protect it from wind and water: in the desert saksovul stops the sand, and on mountain slopes juniper helps prevent soil washing away and mudflows. Trees soften the climate, add moisture to the air and give shade. In cities, trees that tolerate heat and drought are planted: plane tree and elm. Houseplants decorate a room and add a little moisture, but to keep a room fresh you still need to open the windows.
Worked examples
Cotton gives fibre and cloth; wheat gives grain for bread; pine wood is used for furniture and building.
The elm is a big tree that can reach 40 metres and is well adapted to Uzbekistan’s dry climate.
Class activity
“Six benefits”: write “Plant” in the middle of a page and draw six arrows to its benefits (oxygen, food, shade, medicine, wood, shelter). Illustrate one of them.
Practice
1
What do plants release into the air and what do they take in?
They release oxygen and take in carbon dioxide.
2
How do saksovul and juniper protect the soil?
Their strong roots hold the soil: saksovul holds sand, juniper holds slopes.