控制变量（11岁以上）
Controlling variables (age 11+)
形成可检验的科学假设，将自变量与预期结果联系起来；规划完整调查，明确自变量、因变量和控制变量，确定样本量，并进行风险评估。
Form a testable scientific hypothesis linking an independent variable to a predicted outcome, plan a full investigation identifying independent, dependent, and control variables, sample size, and risk assessment
学习证据 / Evidence
- 写出形如“我预测[自变量]会影响[因变量]，因为……”的假设，并附有科学依据。
- 识别并标注自变量、因变量和至少三个控制变量。
- 规划重复读数和适当的样本量，并识别相关危险及其控制措施。
- Writes a hypothesis in the form 'I predict that [IV] will affect [DV] because...' supported by scientific reasoning
- Identifies and labels the independent variable, dependent variable, and at least three control variables
- Plans repeat readings and an appropriate sample size, and identifies relevant hazards with control measures
评估问题 / Assessment
如果{{name}}想研究温度是否影响糖溶解的快慢，他们能否写出清晰的预测，说明具体要改变什么、测量什么，列出三项要保持不变的条件，并指出需要注意的安全步骤？
If {{name}} wanted to investigate whether temperature affects how quickly sugar dissolves, could they write a clear prediction, state exactly what they would change and measure, list three things to keep the same, and identify any safety steps?