True, You climb a mountain and reach the top., Sounds travel like waves in the air., A sound can hit a wall or a mountain., An echo is a sound that bounces back., An echo is like a bouncing ball., You are a sound player., False, You yell "Hello!" in a loud voice., You hear the echo immediately., The sound disappears when it hits something., You throw a ball against a wall in the text.

tomonidan

Vizual uslub

Faoliyat sozlamalari

Ilg'orlar ro'yxati

Namunani almashtirish

Tahrirlashni davom ettirish: ?