公平测试
Fair testing
设置简单的实践探究、对比测试和公平测试，并理解每次只改变一个变量的重要性。
Set up simple practical enquiries, comparative tests, and fair tests, understanding the importance of changing only one variable at a time
学习证据 / Evidence
- 能解释什么样的测试才是“公平”的（只有一个变量改变，其他条件保持不变）。
- 能指出需要改变的变量、需要测量的变量，以及需要保持不变的变量。
- 能在帮助下设计和开展对比测试或公平测试。
- Explain what makes a test 'fair' (only one variable changes, everything else stays the same)
- Identify the variable to change, the variable to measure, and the variables to keep the same
- Set up and carry out a comparative or fair test with support
评估问题 / Assessment
如果{{name}}想知道哪种土壤最适合种豆子，能不能设计一个公平测试，只改变土壤，其他条件都保持不变？
If {{name}} wants to find out which soil is best for growing beans, can they set up a fair test where only the soil changes and everything else stays the same?