英_语单选集考试卷模拟考试题_119

1、姓名：_ 班级：_ 学号：_-密-封 -线- 英_语单选集考试卷模拟考试题考试时间：120分钟 考试总分：100分题号一二三四五总分分数遵守考场纪律，维护知识尊严，杜绝违纪行为，确保考试结果公正。1、suppose you have a brick and a sponge which are exactly the same size. the brick and the sponge will occupy the same amount of space, but they will not weigh the same. if two things are exactly the sa

2、me size, but differ in weight, then they have different densities. the one with the greater weight for the same size has the greater density. the one with lower weight for the same size has the lower density.now apply this idea tofluids. you know that water and air expand when they are heated and th

3、erefore become less dense. if you poured a cupful of very hot water and let it cool, you would have a little less than a cupfull of cool water. if you weighed a cupful of very hot water and a cupful of cool water, the cupful of very hot water would weigh a little less.the cupful of cool water, being

4、 a little heavier than the cupful of hot water, would really have a little more water in it. cold water is denser than hot water. likewise, cold air is denser than hot. air. the greater weigh! of !he denser material makes it fall to the bottom of the container. it pushes up the less dense material.t

5、wo things are the same size but differently weight. that means_. （ ）a.the heavier one has lower densityb.the lighter one has greater densityc.they have the same densityd.they have different density2、suppose you have a brick and a sponge which are exactly the same size. the brick and the sponge will

6、occupy the same amount of space, but they will not weigh the same. if two things are exactly the same size, but differ in weight, then they have different densities. the one with the greater weight for the same size has the greater density. the one with lower weight for the same size has the lower d

7、ensity.now apply this idea tofluids. you know that water and air expand when they are heated and therefore become less dense. if you poured a cupful of very hot water and let it cool, you would have a little less than a cupfull of cool water. if you weighed a cupful of very hot water and a cupful of

8、 cool water, the cupful of very hot water would weigh a little less.the cupful of cool water, being a little heavier than the cupful of hot water, would really have a little more water in it. cold water is denser than hot water. likewise, cold air is denser than hot. air. the greater weigh! of !he d

9、enser material makes it fall to the bottom of the container. it pushes up the less dense material.another word for “fluids” would be_. （ ）a.solidsb.gasesc.densitiesd.liquids3、suppose you have a brick and a sponge which are exactly the same size. the brick and the sponge will occupy the same amount o

10、f space, but they will not weigh the same. if two things are exactly the same size, but differ in weight, then they have different densities. the one with the greater weight for the same size has the greater density. the one with lower weight for the same size has the lower density.now apply this id

11、ea tofluids. you know that water and air expand when they are heated and therefore become less dense. if you poured a cupful of very hot water and let it cool, you would have a little less than a cupfull of cool water. if you weighed a cupful of very hot water and a cupful of cool water, the cupful

12、of very hot water would weigh a little less.the cupful of cool water, being a little heavier than the cupful of hot water, would really have a little more water in it. cold water is denser than hot water. likewise, cold air is denser than hot. air. the greater weigh! of !he denser material makes it

13、fall to the bottom of the container. it pushes up the less dense material.when water is heated, it_. （ ）a.expandsb.becomes cloudyc.will burnd.shrinks4、suppose you have a brick and a sponge which are exactly the same size. the brick and the sponge will occupy the same amount of space, but they will n

14、ot weigh the same. if two things are exactly the same size, but differ in weight, then they have different densities. the one with the greater weight for the same size has the greater density. the one with lower weight for the same size has the lower density.now apply this idea tofluids. you know th

15、at water and air expand when they are heated and therefore become less dense. if you poured a cupful of very hot water and let it cool, you would have a little less than a cupfull of cool water. if you weighed a cupful of very hot water and a cupful of cool water, the cupful of very hot water would weigh a little less.the cupful of cool water, being a little heavier than the cupful of hot water, would really have a little more water in it. cold water is denser than hot water. likewise, cold air is denser than hot. air. the greater weigh! of !h