in what ways is sand in a bowl like a liquid?in what ways it is different?

问题描述:

in what ways is sand in a bowl like a liquid?in what ways it is different?
请务必帮帮我······我science这个星期要考试啊~而且我是中国移民美国···ps:我要的是答案不是翻译~i need a answer

用什么方法(在什么情况下),碗里的沙子会想液体一样?在什么情况下是不同的?
希望能有帮助……