Science Inquiry & Reasoning Flashcards

What is the first step in the scientific method?

Answer: Make an observation

The scientific method typically begins with making an observation about the natural world that sparks a question. This initial observation then leads to forming a hypothesis, designing experiments, and collecting data to test that hypothesis.

Which variable is deliberately changed in an experiment?

Answer: Independent variable

In an experiment, the independent variable is the factor that the scientist intentionally changes or manipulates to observe its effect. It is the "cause" in a cause-and-effect relationship being studied. The dependent variable, in contrast, is the factor that is measured and is expected to change in response to the independent variable.

What is the purpose of a control group in an experiment?

Answer: To provide a standard for comparison

A control group in an experiment is a group that does not receive the treatment or manipulation of the independent variable. Its purpose is to serve as a baseline or standard against which the experimental group's results can be compared, helping to ensure that any observed changes are due to the independent variable and not other factors.

Which of these is an example of a quantitative observation?

Answer: The temperature is 25°C

A quantitative observation involves measurements and numerical data. Stating that "The temperature is 25°C" provides a specific numerical value, making it a quantitative observation. Other options describe qualities without numbers, making them qualitative observations.

What should you do if your experimental results don't support your hypothesis?

Answer: Revise the hypothesis and design new experiments

If experimental results do not support the hypothesis, it indicates that the initial hypothesis may be incorrect or incomplete. The appropriate scientific response is to analyze the data, revise the hypothesis based on the new understanding, and then design new experiments to test the revised hypothesis. This iterative process is fundamental to scientific discovery.

Which of these tools would be most appropriate for measuring the volume of a liquid?

Answer: Graduated cylinder

A graduated cylinder is a tall, cylindrical laboratory tool with markings (graduations) along its side, specifically designed for accurately measuring the volume of liquids. Other tools like thermometers measure temperature, balance scales measure mass, and rulers measure length.

Why is peer review important in scientific research?

Answer: It allows other experts to evaluate the research

Peer review is a critical process in scientific research where other experts in the same field critically evaluate a study's methodology, results, and conclusions before it is published. This process helps to ensure the quality, validity, and credibility of the research, identifying potential flaws or biases.

What type of graph would best represent change over time?

Answer: Line graph

A line graph is the most appropriate type of graph for representing data that shows change over a continuous period of time. The x-axis typically represents time, and the y-axis represents the variable being measured, allowing for a clear visualization of trends and patterns.

Which of these is an example of a scientific model?

Answer: A drawing of the solar system

A scientific model is a simplified representation of a system, phenomenon, or process used to understand, explain, or predict its behavior. A drawing of the solar system serves as a visual model to represent the planets, their orbits, and their relationships, making complex astronomical concepts easier to grasp.