假如你是 Greenhill school的交换生，你参与了该校的一个科学实验．请根据以下实验过程补全英文实验报告．

Water in motion
What You Need： •clear glass tray； •warm water； •large cup with 200 ml of hot water； •large cup with 200 ml of cold water； •red and blue liquid food coloring	Directions： ①Fill the tray with warm water． ②Set the tray on top of the two cups， with the hot cup under one end and the cold cup under the other． ③Add four drops of red food coloring to the water above the hot cup and four drops of blue food coloring to the water above the cold cup． Add both colors at the same time．

Results：

Color	Water	Observations
blue	cold	sinks and stays together：；moves slowly toward hot side in a band of color； spreads out over the hot cup
red	hot	spreads quickly across the top； covers whole top in 1﹣2 minutes， then starts to sink．

Hello， everybody． Here is our report on the experiment "（1）　　"． First， we put the glass tray full of warm water on top of two cups with 200 ml of （2）　　water and cold water． Then， we add red and blue liquid food colorings into the water above the hot and cold cups at the same time．

    After careful observations， we got the（3）　　． The blue food liquid coloring moves downward first and then to the hot side while the （4）　　one spreads quickly and covers whole top in a short time and goes down； the blue liquid food coloring spreads more （5）　　than the red one． Thank you for listening．

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