试题与答案

学习了密度的知识后,同学们准备测量食用油的密度。他们选取的实验器材有:食用油、量

题型:探究题

题目:

学习了密度的知识后,同学们准备测量食用油的密度。他们选取的实验器材有:食用油、量 筒、天平(带砝码)、烧杯。

【设计实验和进行实验】

小新和小杨同学分别设计了一种实验方案,请在方案中的空白处填空:

(1)方案一:

①用调节好的天平测出空烧杯的质量m1

②向烧杯中倒入一些食用油,测出它们的总质量m2,则这些食用油的质量为            ;

③再将烧杯中的食用油倒入量筒中,测出食用油的体积V;

④计算出食用油的密度ρ。

(2)方案二:

①将天平置于水平台后,立即调节平衡螺母,使横梁平衡;

②用天平测出装有适量食用油的烧杯的总质量m1

③将烧杯中的一部分食用油倒入量筒中,记录量筒中食用油的体积V;

④测出烧杯及剩下食用油的总质量m2

⑤计算出食用油的密度ρ=                        

【评估与交流】

(3)请分别找出两种方案中的不足之处:

方案一:                                                                                                  ; 

方案二:                                                                                                  。 

(4)你准备选择方案          来做实验.为顺利完成该实验.该方案中不足之处应改为:                         。 

答案:

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题型:阅读理解

阅读理解。

      The people below all want to take holidays in Australia. There are three places to visit. Help them to decide

which place is the most suitable.

     1. John and Simon are students. They want to have a holiday in summer, but they have very little money.

     2. Shirley and her daughter want to spend a day off and see some typical animals in Australia. Shirley also

wants to buy gifts to take home.

     3. Before Susan leaves Australia, she wants to spend a day shopping. She is looking for something for her

father who is interested in art. She does not like large shopping malls.

     a. The Australian Wildlife Park 

     Give people a close look at Australian native animals. Have your photos taken with kangaroos and koalas.

There are talks every afternoon about these two kinds of animals. You can also get souvenirs about them in the

gift shop.

     b. Students' Working Holidays 

     A cheap(but healthy) holiday. Pick fruits and enjoy nature in the heart of the country. Live on farms in

tents. All meals included. Free transport to work from the railway station.

     c. The Rocks 

     The oldest part of Sydney and full of history. At weekends, there are outdoor concerts to enjoy and a

market for you to buy the works (作品) of local artists.

根据短文内容,完成以下各题。

1. 请在人物和他们的最佳选择之间连线。

★John and Simon                               The Australian Wildlife Park

★Shirley and her daughter                   Students' Working Holidays

★Susan                                             The Rocks

根据短文内容,回答问题。

2. What are the talks about in the Australian Wildlife Park?

   _____________________________________________________________.

3. Does one have to pay for his meals if he chooses Students' Working Holidays?

   _____________________________________________________________.

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