4. Daniel learned in school that fertilizer affects the growth of plants. He wanted to know, how the
amount of fertilizer used affects the growth of plants? Which of the following should he do?
A. conduct an experiment
B. ask her science teacher for the correct answer
C. ask his little brother about it
D. write a letter to the Bureau of Soil and Water Management
5. Which refers to scientific procedure undertaken by scientists to test a hypothesis and
make a discovery or demonstrate a known fact?
A. Theory
B. Inference
C. Conclusion
D. Experiment
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