№150 по английскому языку за 9 класс Л.М. Лапицкая, Н.В. Демченко, А.В. Волков
авторы: Л.М. Лапицкая, Н.В. Демченко, А.В. Волков
Английский 9 класс Лапицкая страница 150
Snowfalls into warm air, melts Into rain
Snow melts, hits cold air, freezes when it hits something
Snow melts, refreezes into sleet as it travels throught cold air
cold air, It never melts on way down
Read the instructions and do the evaporation experiment.
CREATE EVAPORATION (1)
Here is a simple experiment that shows how evaporation takes place.
• a jug of water and a bowl Process:
Pour some water on your hands and rub your hands together, as if you were washing your hands.
•f Your hands are now wet, so do your hands feel cooler? Answer: Yes!
^ After waiting a few seconds, are your hands now dry? Answer: Yes!
The water evaporated off your hands and your hands felt cool, therefore evaporation is a cooling process! The surface from which water evaporates cools down, but the water molecules of the vapour contain the energy of the warm surface.