What do scientists do?
What do scientific investigations traditionally begin with?
A testable question
What is an experiment?
The use of scientific methods to test your hypothesis.
What is data?
information from which a conclusion can be drawn or a prediction can be made. (Facts)
What is one way a scientist may defend a conclusion?
By using observations
How many variables should be tested at one time?
One
What are some examples of reference materials?
Scientific Journals, reputable websites, books
What is a variable?
something that can change in a test
Independent variables-you can control
Dependent variables- changes when an independent variable changes.
What is the difference between precision and accuracy.
Precision is the ability to consistently repeat a measurement.
Accuracy is the ability to make a measure that is as close to the actual value (target) as possible.
Define evidence.
a set of observations that make you believe that something in true.
What is something that scientists using the scientific method would NOT do?
form an opinion and let that drive their results
What is a hypothesis?
What is a control group?
A standard against which change is measured.
ex: Apples with no changes.
What is an inference?
a conclusion based on observations.
Does all evidence support a scientist prediction?
No. During a scientific investigation, evidence may show results that are unexpected. However, this does not mean the experiment was not useful. Unexpected results can lead to new understanding.
For a scientific investigation to be valid is must be able to be ...
replicated
What is an observation?
something you find out about objects, events, or living thigs by using your senses.
Step by step instructions for completing a task.
Tables, graphs
Explain the difference between an observation and an inference.
An observation is information you can see or measure.
An inference is a conclusion based on observations.
A scientific conclusion is based on...
facts and observations
Why would a scientist use a model in an investigation?
Why is it important to organize data with consistency and precision?
It is important to organize data so that people an use the information that has been collected to make inferences. Organizing data also allows other scientists to more easily review and confirm an investigation's results.
Why is it important that scientists' conclusions are based on evidence?
In order for a conclusion to be accepted by the scientific community, it must be based on facts.
What should you be sure to do to stay safe when performing science activities?
Ask my teacher questions.
Pull hair back.
Wear safety goggles.
Never taste or smell any substance unless directed to do so by your teacher.
Use chemicals carefully
Read the activity carefully before you start.
Be safe: handle sharp items and other equipment carefully.