Scientific Method
What part of the scientific method involves writing a sentence using "If" and "Then"?
Hypothesis
Why do scientists use the engineering model?
To solve a real world problem.
What is a constant in an experiment?
Those variables you leave untouched in order to see the causal relationship between the independent and dependent variables
What is the most important lab safety rule?
Follow the directions
What is a fact?
An explanation based off of truth
What is a control group used for?
A basis of comparison
How many times can a scientist plan, test, and improve?
As many times as needed until the real-world problem is solved.
What is Qualitative Data?
Data that is based off of the five senses?
Why is it important to always have your hair pulled back?
What is a hypothesis?
A testable explanation that is written as an "if"/"then" statement.
What happens when the experiment does not support the hypothesis?
How does a scientist communicate their findings using the Engineering model?
Having them publish their work and put it in a library.
What is an inference?
An assumption based on past knowledge
Why is horse play always a violation of lab safety?
Because someone can get hurt!
What is a theory?
An explanation supported by evidence.
Why can't a scientist have two independent variables when conducting an experiment?
A scientist should only have one independent variable to measure the effects on the dependent variable. Other variables should not be changed because the scientist can't determine what caused the dependent variable to change.
What is the purpose of researching in the engineering design model?
To learn what has been done on the problem of interest as well as to see different ways of solving the problem.
What is a hypothesis?
A testable explanation.
Why is it important not to wear open-toed shoes during lab?
To avoid cutting cutting, burning, or damaging your feet.
What is a law?
Explanation supported by math
What is the difference between an observation and an inference?
Observations are what you physically see (qualitative) or measure (quantitative). An inference is an assumption based off of prior knowledge.
List the steps of the Engineering model.
Define the problem, brainstorm, research, plan, build, improve, communicate.
What does wafting mean?
Diluting chemicals with introducing air.
Why should you always keep a clean lab station?
To avoid clumsy accidents and spills.
What is the definition of the scientific method?
The objective process scientists use to answer a question.