Scientific Method and Hypothesis Testing

The video explains the scientific method, a systematic approach to understanding the physical world. It covers the steps of making observations, asking questions, formulating hypotheses, testing them, and analyzing data. Using Alexander Fleming's discovery of penicillin as an example, the video illustrates how the scientific method leads to significant scientific advancements.

What is the primary purpose of the scientific method?

• To prove existing theories

• To ask and answer questions about the physical world

• To create new scientific laws

• To conduct experiments

What was Alexander Fleming's initial observation that led to his discovery?

• An area around the mold was free of bacteria

• Mold changing color

• Mold growing on all plates

• Bacteria growing faster near the mold

What question did Fleming ask after his initial observation?

• Why is the mold growing?

• What type of mold is this?

• How fast does bacteria grow?

• Why is the moldy area free of bacteria?

What is the role of a hypothesis in the scientific method?

• To replace existing theories

• To predict an outcome that can be tested

• To provide a final answer

• To describe natural phenomena

How are hypotheses formed in the scientific method?

• By analyzing data

• Using inductive reasoning

• Using deductive reasoning

• By conducting experiments

What type of reasoning is used to test a hypothesis?

• Inductive reasoning

• Deductive reasoning

• Comparative reasoning

• Descriptive reasoning

Which type of investigation involves comparing two phenomena?

• Descriptive investigation

• Comparative investigation

• Experimental investigation

• Hypothetical investigation

What is the final step in the scientific method?

• Making an observation

• Conducting an experiment

• Analyzing data and drawing a conclusion

• Formulating a hypothesis

What was the significant outcome of Fleming's discovery?

• The discovery of a new bacteria

• The creation of a new type of mold

• The development of a new scientific method

• The invention of the first antibiotic, penicillin

What does analyzing data help scientists determine?

• The validity of the hypothesis

• The type of experiment to conduct

• The best way to publish results

• The next question to ask