辽宁省盘锦市学年八年级物理上册期末考试题.docx
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辽宁省盘锦市学年八年级物理上册期末考试题
盘锦市2015~2016学年度第一学期期末质量检测试卷
八年级物理参考答案
题号
1
2
3
4
5
6
7
8
9
10
11
12
13
14
答案
A
B
C
B
C
B
D
D
A
C
A
ACD
CD
ABD
一、选择题
二、填空题(本题共10小题,每小题2分,共20分)
15.振动;空气16.cm;min17.不变;变小
18.摄氏度;升华19.反射;可逆20.温度;表面积大小
21.蓝;镜面22.38;不变23.折射;反射;虚像
24.1.5(或3/2)
三、作图题(每题3分,共9分)
25.如图:
反射光线1分;折射光线1分;26.如图:
两条折射光线各1分
26题答案
25题答案
27题答案
四、28.简答题:
答:
手有凉的感觉(1分)。
因为吹气时,加快了手表面空气流动速度,加快汗液蒸发速度,蒸发吸热,所以手有凉的感觉(1分)。
哈气手有热的感觉(1分)。
水蒸气遇冷液化、放热手吸热温度升高所以感觉暖和(1分)。
五、计算题(本题共3小题,共20分)
29.(6分)
解:
V=l1l2l3································································1分
=50m×20m×2m
=2000m3····························································1分
∵ρ=m/V··································································1分
∴m=ρV·································································1分
=1.0×103kg/m3×2000m3············································1分
=2×106kg=2000t···············································1分
答:
游泳池内水的质量是2000t。
30.(7分)
解:
(1)∵v=s/t··································································1分
∴s山=v山t山···································································1分
=6m/s×600s=3600m············································1分
(2)t公=s公/v公···················································1分
=8000m/20m/s=400s·················································1分
t总=t山+t公·································································1分
=600s+400s=1000s·················································1分
答:
(1)汽车在模拟山路上行驶的路程是3600m。
(2)汽车完成整个测试过程一共用了1000s的时间。
31.(7分)
解:
m水=m总—m瓶·················································1分
=0.8kg—0.3kg=0.5kg················································1分
∵ρ=m/V··································································1分
∴V水=m水/ρ水···············································1分
=0.5kg/1.0×103kg/m3
=0.5×10-3m3··································································1分
V液=V水=0.5×10-3m3
m液=m总′—m瓶
=0.7kg—0.3kg=0.4kg················································1分
ρ液=m液/V液
=0.4kg/0.5×10-3m3=0.8×103kg/m3·································1分
答:
这种液体的密度是0.8×103kg/m3。
六、实验探究题:
32.(5分)每空1分
(1)v=s/t
(2)平行
(3)
70
增大
小车从斜面顶端滑下时,滑过C点的速度大于0m/s。
33.(7分)每空1分
(1)同一高度
(2)较暗(3)清晰;上
(4)u<f,凸透镜不成实像;
撤去光屏,在原来放光屏的一侧透过透镜观察,看能否观察到蜡烛的像(2分)
34.
(1)零刻度线
(2)称量时调节平衡螺母 (3)81.6 (4)1