为了比较水和沙子吸热本领的大小，小明做了图所示的实验：在2个相同的烧杯中分别装有质量、初温都相同的水和沙子，用两个相同的酒精灯对其加热，实验数据记录如下：
（1）在此实验中，用加热时间的长短来表示物质____________。
（2）分析下表中的实验数据可知；质量相同的水和沙子，升高相同的温度时，水吸收的热量_______（大于／小于）沙子吸收的热量。
（3）如果加热相同的时间，质量相同的水和沙子，__________（沙子／水）升高的温度更高。
（4）实验中有些同学发现：刚开始加热时，情况与（3）结论不符，你认为可能的原因是：____________________________________。
（1）吸收的热量（的多少）；
（2）大于；
（3）沙子；
（4）可能的原因是：①水的导热性能好或沙子导热性能不好；②沙子里温度计玻璃泡插入比较浅；③没有用搅拌棒搅动。
| 阅读短文,根据短文内容补全表格中所缺的信息,每空一词。 | ||||||||
| Do you still get free plastic bags(塑料袋) from the supermarkets? Things have changed. China has decided to take action to stop the use of free plastic bags at shops and supermarkets, and people have to pay for using plastic bags. The rule(规定) started on June 1. It came because our country tried to make litter less. The Chinese once used about 3,000,000,000 plastic shopping bags a day, and they made the environment pollution more serious and wasted a lot of energy as well. People throw the used plastic bags away here and there. The thrown-away plastic bags are not easy to break . So the Chinese government encourages people to bring their own bags or baskets for shopping. What kind of shopping bag is the best to bring? Some students have good ideas. They make their own shopping bags. They use old clothes to make cloth bags (布 袋) , and send them to their parents as presents. They also ask their parents and friends to use cloth bags instead of plastic ones. They think it is their duty to protect the environment.
| ||||||||