2019-2020年六年级毕业班科学测试题（B）.doc

2019-2020年六年级毕业班科学测试题（B）一、填空。（每题2分，计12分）1凸透镜的作用是_、_和_。2阳光通过_后，会分散成红、橙、黄、绿、_等七种色光。3地球自转和公转的方向都是 的。4月相是在月球围绕地球_的过程中形成的。5螺丝钉的螺纹越密，拧起来就越 。6生物体都是由 组成的。二、判断。（每题2分，计20分）1斜面是一种能省力但不能改变用力方向的简单机械。（ ）2在轴上用力比在轮上用力要省力。（ ）3杠杆的支撑点离物体越近，离用力点越远时，就越省力。（ ）4.杠杆、斜面、轮轴、滑轮都是简单机械。 （ ）5使用滑轮组既能省力又能改变用力方向。（ ）6月球转到地球和太阳中间时，我们这里就会看到日食。（ ）7日食和月食发生的时间和地区，可以准确地推算出来。（ ）8哈雷彗星，每隔一年就能看到一次。（ ）9距离太阳最近的行星是地球。（ ）10光年是计量时间的单位。 （ ）三、选择。（每题2分，计20分）1下列物品中，应用斜面原理制成的是（ ）跷跷板楼梯螺丝刀2下列物体不是光源的是（ ）。太阳 月球 萤火虫 3水龙头是一种（ ）杠杆 斜面 轮轴4旗杆顶端的滑轮的作用是（ ） 能改变用力方向，但不能省力 既不省力，又不改变用力方向能省力，但不能改变用力方向5阿基米德说：“给我一个（ ），我可以支撑起整个地球！”支点 重力点 杠杆6昼夜现象出现的原因是（ ）。地球自转 地球公转 月球运动 7造成臭氧层空洞的主要原因是（ ）。人口爆炸 大气污染 森林破坏8全球生态的头号杀手是（ ）淡水缺乏 人口爆炸 土地荒漠化9海洋面上升的主要原因是（ ）洪水增多 温室效应 海洋环境恶化10很多使用过的物品都可以回收利用，世界通用的回收标志是（ ）。 四、实验。（每题6分，计48分）1 上图是模拟_成因的实验。 电灯当作_；皮球当作_ _；甲同学的头当作_。 发生以上自然现象时，以上三者的位置关系是：（用简图表示）2把下面的滑轮用线连起来，并写出它们的作用。 作用 作用 作用 3我的解释：4在括号内填上“吸热”或“放热”。5保护环境是我们每个人的责任。你是不是和小伙伴们一起制定了环保行动计划或方案呢？你们是打算怎样开展环保行动的，请列举几条。6下图是研究电磁铁的磁力大小与（ ）有关的对比实验。实验中需要改变的条件是： 不需要改变的条件是： 实验说明： 7你用什么方法测过放大镜的放大倍数？把操作的过程回忆一下，写下来。8根据图示，试着用杠杆原理来解释动滑轮为什么能省力。（5分）支点重点力点附送：2019-2020年六年级毕业练习试卷(2)左右匹配：()1. Here is your watch, Mike.A. I know where your pen is.()2. I cant find my pen.B. You must look after your clothes.()3. Its twelve oclock.C. Put on your coat and shoes.()4. You must go to school now. D. Thanks very much.()5. Here is your shirt, Jim.E. I must go now, bye-bye.()1. May I e in?A. Youre wele.()2. Do you know his telephone number?B. Hes a doctor.()3. How much is it?C. e in, please.()4. Id like to write a letter.D. Fine, thank you.()5. Which bus?E. Yes, you can.()6. Are they Mr. Kings students?F. Seventy-one yuan.()7. Dad, can I have an apple?G. Me, too.()8. How are you this morning?H. No. 6.()9. Whats the man in white?I. Yes, its 3854673,()10.Thank you very much.J. No, they arent.()1. Look at the flowers, Lucy.A. Im in Class 4, Grade 6.()2. Its three twenty.B. Sure, its 273849.()3. Whose keys are these?C. Its time to go to the playground.()4. What class are you in?D. No, were in different rows.()5. Are you in the same row?E. Hes Helens father.()6. Wheres Yucai School?F. How beautiful.()7. Do you know her telephone number?G. Its next to the cinema.()8. Whos the man in the photo?H. Are they Lin Taos?()1. Who is the boy in brown?A. Its Mr. Browns, I think.()2. Whose jacket is this?B. Hes Anns brother Tom.()3. What colour is your bike?C. Its about six.()4. Whats the time, please?D. Its black.()5. Can I have an egg?E. Twenty.()6. How many cars can you see?F. Yes, please.()7. Its time to go to school.G. Thank you.()8. You have a nice skirt, Kate.H. Yes, lets go.()1. What colour are her eyes?A. Sorry, I cant.()2. Is it a map of Jiangsu?B. Hes from America, I think.()3. Can I sit here?C. Yes, I am.()4. Are there English books on the desk?.D. Thank you.()5. Which is your bag?E. OK, lets.()6. Wheres Sandy from?F. Theyre black.()7. Lets play games.G. Yes, its a map of Jiangsu.()8. This present is for you.H. The green old one.()9. Can you speak Japanese?I. Yes, there are.()10.Are you a new student in this class?J. Sure, please.()1. Wheres the toilet, please?A. No, its time to play.()2. Wele back to school.B. Sorry, I dont know.()3. Can you see a bank next to the park?C. Theyre ours.()4. Shall we give him some apples?D. Yes, theyre ours.()5. Whose keys are these?E. You can take a bus.()6. What do you want?F. Thank you.()7. How much are they?G. An apple, please.()8. How can I get there?H. No, I cant.()9. Are they yours?I. Yes, lets.()10.Is it time to go to class?J. Twelve yuan.()1. Whos the girl on the chair?A. All right.()2. Read these numbers, please.B. Some kites.()3. Where are the shoes?C. On the floor.()4. How many kites can you see on the floor.D. Some cakes.()5. Whose key is that?E. Yes, lets.()6. Is it my turn to dance?F. Wang Yings.()7. W