NCAE Science Practice QuizOnline version Practice questions on scientific method and data by Mary Ann Tolibao 1 A student tests sunlight on plant growth. Which variable should be kept constant? a Growth rate b Amount of sunlight c Height of the plant d Type of plant 2 Which statement best describes a hypothesis? a A proven explanation b A collected data set c A testable prediction d A question 3 Which step comes immediately after identifying a problem? a Formulating a hypothesis b Analyzing data c Drawing conclusions d Publishing results 4 Why is a control group important in an experiment? a To increase sample size b To eliminate variables c To provide a comparison d To prove the hypothesis 5 Which variable is intentionally changed by the researcher? a Dependent constant b Controlled variable c Independent variable d Responding variable 6 If results are inconsistent, the BEST action is to a Ignore the results b Adjust the conclusion c Repeat the experiment d Change the hypothesis immediately 7 Which improves the reliability of an experiment most? a Changing variables b One large sample c Repeating trials d Using opinions 8 A scientist records temperature every hour. This is an example of a Quantitative data b Inference c Qualitative data d Biased observation 9 What makes an experiment fair? a One variable is tested at a time b Conclusions are assumed c Results favor the hypothesis d Many variables change 10 Which conclusion is valid? a Based on opinions b Based on predictions c Based on assumptions d Based on data
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