Nature of Science

When designing a study, why is it important to use repeated trials?

• To ensure the study is completed quickly

• To increase the reliability of the results

• To reduce the number of variables

• To simplify data analysis

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How can a model be useful in scientific investigations?

• It can replace the need for experiments

• It helps in relating the results of investigations

• It provides exact predictions

• It eliminates the need for data collection

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Why might a scientific theory be modified over time?

• New evidence may emerge that supports a different explanation

• Theories are often incorrect

• Scientists prefer to change theories regularly

• Theories are based on opinions

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What is the value of a hypothesis in scientific investigations, even if it is not supported by data?

• It can lead to further investigations

• It proves the experiment was incorrect

• It confirms the initial theory

• It is discarded immediately

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Plan a simple experiment to test the effect of sunlight on plant growth. What is the independent variable in this experiment?

• The amount of water given to the plants

• The type of plant used

• The amount of sunlight the plants receive

• The growth rate of the plants

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In a study to determine the boiling point of water at different altitudes, what would be a reason to conduct repeated trials?

• To ensure the water is pure

• To confirm the consistency of the results

• To use different types of water

• To test different altitudes

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Which of the following best describes a scientific model?

• A detailed description of a theory

• A simplified representation of a concept or process

• A collection of data points

• A set of instructions for an experiment

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Explain why a hypothesis that is not supported by data is still valuable in scientific research.

• It can be used to prove other hypotheses

• It helps refine the research question

• It is discarded and not used again

• It confirms the original theory

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A student claims that increasing the temperature of a liquid increases its evaporation rate. Design an experiment to test this hypothesis. What would be the dependent variable?

• The type of liquid used

• The temperature of the liquid

• The rate of evaporation

• The container used

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Why is it important to select appropriate models in scientific investigations?

• Models can replace actual experiments

• Models help in visualizing and understanding complex processes

• Models are always accurate

• Models eliminate the need for data analysis

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