第十九课

Unit 5第五单元     Position and Speed位置与速度

1. "A small bamboo raft swims in the river, and the majestic green hills walk on both sides." “小小竹排江中游，巍巍青山两岸走。”

2. Who is in motion, the bamboo raft or the green hills?竹排和青山谁是运动的？

3. Who is stationary?谁是静止的？

4. How are they related to each other?它们之间有怎样的关系呢？

19   Measuring distance and time测量距离和时间

1. To find out how far it is between two places, what are the measurements?要想知道两地之间有多远，有哪些测量方法？

2. Materials package: tape measure, etc.材料包：卷尺等

3. Activity process活动过程

4. Measure how far it is between two trees.量一量两棵树之间有多远。

5. My method is -----我的方法是······

6. Exploration Skills探究技能

7. Using tools to determine how far between two trees is measuring.利用工具确定两棵树之间有多远，就是在测量。

8. The length between two points is the distance between the two points.两点之间相隔的长度就是两点之间的距离。

9. Commonly used units of distance are centimeters, meters, kilometers, etc.常用的距离单位有厘米、米、千米等、

10. measure how long it takes to run a distance.测一测跑一段距离需要多长时间。

11. Timing methods are also available at ------计时方法还有······

12. data cards资料卡

13. Electronic stop watch is a common timekeeping tool in the laboratory.电子停表是实验室里常用的计时工具。

14. To use, first zero the electronic stop watch.使用时，先将电子停表归零，

15. Press the Start button to start the timer.按下开始键开始计时，

16. Press the Stop button to stop the timer.按下停止键停止计时。

17. extension activities拓展活动

18. Find out what tools are used to measure distance in life.了解生活中测量距离的工具有哪些。