暑假作业答案 八年级【最新4篇】

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八年级暑假作业答案 篇一

一、1.热胀冷缩的,35℃-42℃   2.甲:11℃、乙16℃、丙:9℃

3.冷热程度,温度高   4.冰水混合物,一标准大气压下沸水,-273℃

5.与温度计玻璃泡充分接触,温度计的量程(测量范围),与温度计垂直

6.t=t+273k,开尔文,k,316k

7.(1)液化,吸热 (2)汽化,吸热 (3)凝华,放热

8.(1)汽化 (2)液化 (3)升华 (4)凝华

9.只在表面,任何温度都可发生的缓慢的汽化现象,升高液体温度,加快液体表面的空气流动,加大液体表面积。发生部位不同、温度条件不同、汽化快慢程度不同。吸收热量

10.晶体,非晶体。都要吸收热量,晶体有固定熔点,非晶体没有固定熔点

11.(1)230(2)固体升温,熔化,温度,吸收热量。液体升高,液体降温,液体凝固成晶体的过程,放出热量,固体降温。(3)3,固液共存,凝固,前者吸热后者放热

12.温度足够低,提高液体压强

二、1.a   2.c   3.d   4.c   5.ad   6.c

7.b   8.bc 9.d   10.c   11.a   12.c

三、1.×  2.×  3.√  4.×  5.×  6.×  7.√  8.×

四、1.估测被测物体温度,并看温度计的测量范围

2.玻璃泡不离开被测物体,不碰到被测物体以外的物体。

3.离开被测物体,视线与温度计垂直。

篇二:

一、选择题(共36分,每小题2分)

题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

答案 d b d d a c a d b d b a b b d c d b

二、填空题(共14分,每空1分)

19.增大 不变 20.10 减小

21.8 竖直向上 22.大 受力面积小,压强大

23.连通器 上升 24.自身的重力 不变

25.转动摇把 定滑轮

三、实验探究题(第26题2分,第27题4分,第28题4分,第29题5分,计15分)

26.评分说明:正确画出f 的力臂l1( 1 分) 、重力g的示意图( 1 分)

27、(1)二力平衡 ;

(2)甲和丙 接触面越粗糙;

(3)没有控制压力大小保持不变

28、(1)让力臂沿杠杆,便于直接从杠杆上读出力臂的大小; f1×l1= f2×l2;

(2) 1 变大

29、(1)2.4; (2)当物体排开液体的体积一定时,物体所受浮力的大小与液体密度有关,且液体密度越大,所受浮力越大;

(3)物体排开液体的体积;与物体浸入液体的深度; (4)1.2×103

暑假作业答案 八年级 篇二

语法篇

I. 1. longer   2. to clean     3. to listen     4. plays    5. are

6. to stop   7. won’t feel     8. open       9. mend    10. terribly

II. 1-5 DDBAC 6-10 BCDBA

III. 1. like eating     2. a great / big success     3. always asking

4. angry with     5. complain about; stops working

6. to finish; to work   7. to keep; quiet       8. was shown; the 1950s

9. to laugh at     10. in trouble with

IV. 1. me www.shubaoc.com mory   2. old     3. their

4. to protect    5. hear about

6. recently   7. like    8. is caused   9. questions 10. first

暑假作业答案 八年级 篇三

I. 1-5 ADBCC 6-10 ADBAC

II. 1. change    2. since     3. held     4. they     5. make

6. much    7. agree     8. problems   9. if     10. worry

III. (A) 1. free   2. soon     3. Where   4. buy   5. have a great time

(B) 1. weather   2. wrong   3. like     4. be     5. pity

6. mistakes   7. again     8. not     9. reading   10. rainy

(C) 1-5 ECGFA

IV. One possible version:

NOTICE

There will be a speech in the school hall this Thursday afternoon. The topic is about the protection of the environment. All the teachers and students should go to the hall on time. The speech includes the following points.

Firstly, we should not litter everywhere in order to keep the environment clean. Secondly, we must take good care of the plants so that we can enjoy the green. Thirdly, we should walk or ride bikes more. Fourthly, we also should save wa

ter and electricity.

The Students’ Union

暑假作业答案 八年级 篇四

词汇运用

I. 1. improve     2. lifeless   3. flood     4. prefer    5. atmosphere

II. 1-5 CCADB

III. 1. pollution  2. confident     3. Steam     4. state     5. cause

6. climate     7. sightseeing     8. solve     9. sunlight   10. view

IV. 1. educational   2. doesn’t turn    3. arrival   4. to support 5. speaking

6. thought   7. deeply     8. protection   9. to read 10. more

V. 1. information 2. habit 3. member  4. host 5. aim

6. exchange 7. passport 8. result    9. square

10. environment

VI. 1. put out         2. learnt about     3. since then

4. in the form of     5. take action

句型演练

I. 1. Mr Wu starts his day by taking a cold shower.

2. We didn’t go fishing because of the wind.

3. She does eye exercises so that she can protect her eyes.

4. The student exchange gives you a chance to learn a new language.

5. Millie is such a clever girl that she is good at all subjects.

II. 1. took many / a lot of photos   2. to rise       3. as soon as possible

4. strong enough to stop     5. keep / stop; from getting

6. keeps in touch       7. all the way     8. as well as

9. so many; that         10. looking forward to working

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