An experiment (实验) you can try at home | |
WHAT YOU NEED | STEPS TO TAKE: ·Fill the glasses with water. Put two large spoons of salt into the first glass and stir (搅拌) it. ·Add a few drops (滴) of food colouring into the other glass. ·Cover the glass of coloured water with the cardboard/plastic. Turn it upside down and put it on top of the glass of salt water. Pull the cardboard/plastic out from between the glasses. ·The coloured water and the colourless salt water won't mix! |
HOW IT WORKS: The coloured water and the colourless salt water stay apart (分离) because salt water is heavier. The heavier salt water stays at the bottom of the glass and the lighter coloured water at the top. |