Water is a liquid. When it is heated, it moves around faster and faster. When it starts to boil, the liquid turns into a gas. This gas is called water vapor. This gas is lighter than the water around it. It rises to the top. Then it disappears into the air.
As the water gets hotter and hotter, it starts turning into gas very quickly. A lot of bubbles form at the same time. All these bubbles try to escape at once. The bubbles push the water out of the way and “jump” out. This is what we call “boiling water.”
- bubble /ˈbʌb(ə)l/: bong bóng nước, bọt nước
- gas /ɡæs/: khí
- vapor /ˈveɪpər/: hơi nước
- escape /ɪˈskeɪp/: trốn thoát,
- jump out /dʒʌmp/: nhảy ra ngoài