Scientific Method
This step involves making an observation and asking a question based on that observation.
What is asking a question?
This is the first step in the engineering design process.
Defining / Finding a problem
This variable is manipulated in an experiment to observe its effect.
Independent Variable
"I" changed this
If you notice that plants grow taller when given more sunlight, what hypothesis could you propose about the relationship between sunlight and plant growth?
If plants receive more sunlight, then they will grow taller than plants that receive less sunlight.
_________, refers to the repeatability of measurement, and is close to the true value
Precision
In this phase, a scientist formulates a testable statement about the expected outcome of an experiment.
What is forming a hypothesis?
After brainstorming solutions, this step involves creating a detailed plan or blueprint for the proposed solution.
Building a prototype
In an experiment testing the effect of fertilizer on plant growth, this variable is measured to see how it changes
Dependent Variable
You observe that students who study in groups tend to score higher on tests. What hypothesis might you formulate regarding group study and test scores?
If students study in groups, then they will achieve higher test scores compared to those who study alone.
Long hair in the laboratory must be ______________.
tied back
This step follows the hypothesis.
What is conducting an experiment
In this phase of the design process, engineers evaluate their designs to ensure they meet the original criteria and constraints.
Testing and Evaluating
In a study examining how sleep affects test scores, the amount of sleep participants get is considered this type of variable.
Independent Variable
In a classroom experiment, you want to test whether different types of fertilizers affect the growth of tomato plants. What hypothesis would you create?
If tomato plants are given different types of fertilizers, then those treated with organic fertilizer will grow faster than those treated with chemical fertilizer.
what graph/table would be best suited to show how the price of lemons changed each month over a year?
Line Graph
After doing the experiments scientists complete this step.
record and analyze the data
This iterative step allows engineers to refine their designs based on feedback and testing results.
revising or improving the design?
This variable is often referred to as the "outcome" variable in an experiment.
Dependent Variable
After noticing that people who exercise regularly tend to have lower stress levels, what hypothesis could you develop about exercise and stress?
If people engage in regular exercise, then their stress levels will be lower compared to those who do not exercise.
Conclusions drawn from a scientific investigation must be based on ________.
evidence
In this final step of the scientific method.
Communicate or share the results.
In the engineering design process, the final stage involves sharing results and insights with others, often called this.
Share results
In an experiment where temperature is varied to observe its effect on reaction rate, temperature is classified as this type of variable.
What is the independent variable?
You want to investigate whether the temperature of water affects how quickly sugar dissolves. What hypothesis could you propose?
If the temperature of the water increases, then sugar will dissolve more quickly than in cooler water.
A biologist reported success in breeding a donkey with a zebra that produced a
healthy offspring. Other biologists will accept this only if____________.
it can be repeated or replicated