题目内容

【题目】读图填空。

(1)读图甲A点纬度是 , 经度是
(2)A点在C点的方向。
(3)从南北半球看,B点的半球位置
(4)在A,B,C三点中,所在纬线圈最长的是。A,B,C三点中高纬度的是(填字母)。
(5)该点离赤道最近读图乙地球某时刻光照示意图,完成下题。

地球自转的方向是 , 自转周期。地球自转产生地理现象

【答案】
(1)70°N,30°E
(2)正北
(3)北半球
(4)C,A
(5)自西向东,一天,昼夜交替和时间差异
【解析】本题考查经纬网地图及地球自转的相关知识,读图理解解答即可。

(1)人们把赤道定为0度纬线,向南向北各分为90度,在赤道以南的叫南纬(S),度数向南越来越大;在赤道以北的叫北纬(N),度数向北越来越大;人们把本初子午线定为0度经线,向东向西各分为180度,在0度经线以东的叫东经(E),度数向东越来越大;在0度经线以西的叫西经(W),度数向西越来越大。读图分析可知,图中A点的纬度是70°N,经度是30°E。

(2)根据纬线指示东西方向,经线指示南北方向可以判断,图中A点在C点的正北方向。

(3)南北半球的分界线是赤道,赤道以北是北半球,以南是南半球。读图可知,B点在赤道以北,所以在北半球。

(4)纬线的长度的分布特点为赤道最长,向两极渐短成一点。读图可知,图中A、B、C三点中,C点离赤道最近,所在的纬线圈最长。0度~30度为低纬度地区,30度~60度为中纬度地区,60度~90度为高纬度地区,读图分析可知,图中A在高纬度,B在高纬度,C在低纬度。

(5)地球绕地轴不停转动,叫地球自转。地球自转的方向是自西向东,自转的周期是一天。地球自转产生的地理现象是昼夜交替和时间差异。

所以答案是:(1)70°N;30°E;(2)正北;(3)北;(4)C;;A;(5)自西向东;一天;昼夜交替和时间差异。

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【题目】

The rockets take astronauts and man-made satellites into space. The satellites are used for communication, weather monitoring and research. But how do satellites stay up without Falling down?

There are two opposite forces acting on the satellite. One of them is the force of gravitation(地心引力), which tries to pull the satellite toward the earth. The other force is created by the rotation (旋转)of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round. The gravitational pull of the earth is like a rope which keeps the satellite from flying away.

Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the gravitational pull stronger than the force pulling it away. This makes the satellite crash (坠落)down to the earth.

1The force that pulls the satellite towards the earth is created by ________.

A. the earthB. the satellite itself

C. the rotation of the satelliteD. the rope

2Why can't the satellites fly away?

A. Because of the force from the earth.

B. Because the satellite is too big.

C. Because of the force created by the rotation of the satellite around the earth.

D. Because people on earth have made ropes to tie the satellites tightly.

3Which of the following is TRUE according to the passage?

A. There are four forces acting on the satellite.

B. The force of gravitation makes the satellite go round and round.

C. As time goes by, the satellite will finally fall down.

D. The satellite will stay in space forever.

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