小明用易拉罐完成下列两个实验：
（1）为了探究物质吸热升温的属性，小明在两个易拉罐中分别装入质量相等的水和沙子（图甲），实验中还需要的实验器材是_____________，通过记录相同时间内___________就可比较水和沙子吸热升温的属性．
（2）小明在另一个易拉罐中注入少量水，并给易拉罐加热至罐口出现白雾，把易拉罐口迅速倒扣在水中，易拉罐很快变瘪，且有较多水冲进易拉罐（图乙）．原因是加热使罐内的水经________（填“汽化”或“液化”）成水蒸气，排出空气，把易拉罐倒立于水中，罐内的水蒸气发生了_________现象，水面的大气压_________（填“＞”、“＜”或“=”）罐内的气压将水压进罐内．
（1）温度计；温度变化（升高的温度）
（2）汽化；液化；＞
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| Scientists said that in the past 100 years, as the global (全球的) temperatures went up by 0.74℃, the temperature in North China has climbed 1.4℃ in only 50 years. China needs to to cut carbon dioxide (二氧化碳) emission (排放), because it's the main reason for global warming. The good news is that China has seen the importance of going green. China set the goal of cutting energy use by 20 and pollution emission by 10 in the 11th Five-Year Plan. Can you slow down global warming? Sure! (3)You and your family can take steps to cut the amount of carbon dioxide that is sent out into the air. Here are some pieces of advice to help you save the earth. ▲ Wear used clothes. Wearing your brother's, sister's or dad's old T-shirt means you save the energy. ▲ Change your light bulbs (灯泡). Use energy-saving light bulbs. And don't forget to turn off the lights when you leave a room and turn off your television and computer when they are not in use! ▲ Ride the bus. Taking a bus saves a lot of oil every year. ▲ Say no to plastic bags. The next time your parents go to the market, ask them to use baskets. ▲ Open a window. Don't use the air conditioner (空调), and let some fresh air in. When you have to use the conditioner, set the temperature higher in the summer and lower in the winter to save energy. Make small changes in your daily life. Don't use paper cups, bags and boxes. It's time for all of us to do something to save the earth. | ||||
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