Questions and Answers
A hypothesis must be based on scientific knowledge.
True
A scientific theory is a guess about how or why something happens.
False
Scientists make predictions that tell what will happen under any and all conditions.
False
The scientific method includes the steps involved in a scientific investigation.
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"Did life on Earth evolve over time?" This question can be answered scientifically.
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Scientific experiments are performed under controlled conditions.
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Scientists can study all aspects of the natural world, including experimenting on an extinct animal.
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Communicating your results allows others to test your hypothesis.
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Experimental evidence that agrees with your prediction falsifies your hypothesis.
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The first step in a scientific investigation is always to develop a hypothesis.
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Scientists gradually build an increasingly accurate and detailed understanding of the natural world.
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Newton discovered the law of gravity when an apple fell from a tree and hit him on the head.
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Scientific evidence is any type of data that may either agree or disagree with a prediction.
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Scientific theories are broad explanations that are widely accepted as true.
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Assumptions scientists make include:
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A hypothesis:
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A scientific theory:
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Which is the correct order in a scientific investigation?
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To test a hypothesis:
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An scientific experiment:
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Food chains are scientific models that:
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Science cannot answer all questions.
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Study Notes
Scientific Hypothesis and Theory
- A hypothesis must be grounded in scientific knowledge and can be proven incorrect.
- A scientific theory is an explanation based on substantial evidence, contrasting with a mere guess.
Scientific Method
- The scientific method includes systematic steps such as observation, questioning, forming hypotheses, and testing them.
- The first step in scientific investigation involves making observations rather than jumping straight to a hypothesis.
Predictions and Experimental Conditions
- Scientists cannot predict outcomes under all conditions; predictions are generally based on specific scenarios.
- Scientific experiments must be conducted under controlled conditions to ensure accuracy and reliability.
Communication and Evidence
- Sharing results allows peer testing of hypotheses and fosters scientific discourse.
- Evidence that aligns with predictions supports a hypothesis, while conflicting data may lead to falsification.
Understanding Natural World
- Scientists progressively advance their understanding of natural phenomena through ongoing research and refinement of theories.
- The statement that life on Earth evolved over time can be examined using scientific methodologies.
Limitations of Science
- Not all aspects of the natural world can be tested experimentally; extinct species, for example, cannot be subject to modern experiments.
- Science cannot provide answers to all inquiries, especially those related to belief systems.
Scientific Models and Food Chains
- Food chains serve as simplified scientific models, aiding in the comprehension of interactions within ecosystems.
Steps of Scientific Investigations
- A proper sequence in scientific investigations involves making observations, posing questions, forming a hypothesis, and conducting tests.
- Predictions play a crucial role before testing a hypothesis.
Core Principles of Science
- Fundamental assumptions in science include the idea that nature can be understood through systemic study, and that scientific ideas are subject to change based on new evidence.
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Description
Test your understanding of crucial concepts from Biology Chapter 1 with this practice test. Evaluate your knowledge of hypotheses, theories, and scientific predictions by answering true or false questions. Perfect for reviewing foundational ideas in biology.
