小组实验报告
Group experiment report
实验研究对象：在塑料瓶中装满水，在瓶盖上戳洞，研究水射程的远近，跟什么有关系。
Experimental research object: Fill a plastic bottle with water, and poke different areas holes in the lid, uses the biggest power to squeeze the plastic bottle in different high and angle of inclination, observe what factor is related to water range.
实验的变量：洞的大小、塑料瓶离地高度、塑料瓶的倾斜角度。 Experimental variable quantity: the size of holes, height from the ground, the angle of inclination.
一、 准备实验用具：
准备好几个一样的塑料瓶，用不同大小的螺丝刀在瓶盖上戳出不同大小的三个洞。再准备好米尺和一般的尺子，以及量角器。在进行每次实验前，把塑料瓶里的水灌满，以达到用近乎相同的力去挤压瓶子，保证力在整个实验中处于相同的状态。
Ⅰ.Prepare experiment tool: Several plastic bottle, uses a
screwdriver to poke three different size holes in the bottle cap. And then, meterruler, ruler, andprotractor. Before experiment, fill the plastic bottles with water; use the same strength to squeeze the bottle. We need to ensure the strength is same in the whole experiment.
二、作出假设：
首先，我们推测，洞口越小，水的射程越远。其次，我们推测，在0°到90°之间，随着角度的增大，水的射程越远。最后，我们推测，水射程的远近，跟塑料瓶距离地面的高度无关。
Ⅱ.Make assumptions
First of all, we speculate that the smaller the hole, the longer range of water. Second, we speculate that with the increase of angle, the range of the water will be longer. Finally, we speculate that range of water has nothing to do with the height of the plastic bottles from the ground.
三、进行试验，数据收集与整理：
首先，我们保持塑料瓶距离地面100cm，塑料瓶的倾斜角度为0°，分别用三个有不同大小圆洞的瓶盖，依次测量水的射程，来验证水的射程与瓶盖上洞大小的关系，进行比较。实验数据如下所示：
Ⅲ.Do experiment, collect data and analyze data
⑴ First of all, we keep the plastic bottles from the ground 100 cm, plastic bottle angle for 0, respectively with three different size
hole and, in turn, measuring the range of water, to test the
relationship between range of the water with the hole size,The
experimental data are shown below:
其次，我们保持塑料瓶距离地面高度为100cm，用有最小的洞的瓶盖，改变塑料瓶的倾斜角度，测量水的射程，来验证水的射程与塑料瓶倾斜角度的关系。实验数据如下所示：
⑵ Second, we keep the plastic bottles from the height of 100 cm, use the smallest hole of the cap and change the plastic bottles
angle, measuring the range of water, to verify the relationship
between plastic bottles angles of inclination andthe range of the water.The experimental data are shown below:
最后，我们保持塑料瓶的倾斜角度为0°，使用最小洞口的瓶盖，改变塑料瓶距离地面的高度，测量水的射程，来验证水的射程与塑料瓶距离地面高度的关系。实验数据如下所示：
⑶ Finally, we keep the plastic Angle for 0, with minimal the hole of the cap and change the height of the plastic bottles from the
ground, measuring the range of water, to verify the relationship between range of water and height. The experimental data are
shown below:
四、对比推测与实验结果：
Ⅳ.Compare the test results with speculation
如表格及折线图所示，我们可以看出，水的射程与塑料瓶的倾斜角度、瓶盖上小孔的大小、以及塑料瓶距离地面的高度都有关系。
As shown in tables and line charts, we can see that the range of water are influenced by angle ,size of holes and height of plastic bottles from ground.