Unit 1 Flashcards
Identify the three-way scientists can investigate the natural world
Observing
experiments
building a model and testing the model
List and describe the six steps of the scientific method in order
State the problem gather info form a hypothesis test the hypothesis analyze data draw conclusions
Explain how to proceed after completing the scientific method
Hypothesis is not supported
Hypothesis is supported
Explain step 1-state the problem
Often written as a question
usually derived from an observation of an event or an activity that is not working
Explain Step 2 gather information
Before forming a hypothesis it is useful to learn as much as possible about the background of the problem
it also may be helpful to see what others have found in their work
Explain Step three -form a hypothesis
Step three -form a hypothesis
a hypothesis is a possible explanation of a problem this is made using what you know and what you gathered during step 2
Explain step 4-test the hypothesis
Some hypotheses can be tested by making observations
others can be tested by building a model and relating it to real life situations
a common way to test a hypothesis is to perform an experiment
Explain step 5-analyze data
An important part of every experiment includes recording observations and organizing the data into tables and graphs
this allows for accurate interpretation of the data and analysis of the observations
Explain step 6-draw conclusions
Based on the analysis of your data you decide whether or not your hypothesis is supported
if yes continue to test it over and over again you must get the same result every time for the hypothesis to be considered valid
if not modify the hypothesis and repeat all steps
Explain how to produce an experiment without bias
experiments without bias must
involve many trials
have measurable data
be repeatable
What is a scientific theory
A scientific Theory is an explanation of things or events based on knowledge gained from many observations and investigations
it is not a guess
just because it has data supporting it does not mean it will be it will never change
What is a scientific law
A scientific law is a statement about what happened in nature and what seems to be true all the time
Laws tell you what will happen but they don’t explain why or how
—an example of a law his gravity
Explain why we need standards and units for measurement
A standard is an exact quantity that people agree to use to compare measurements
—if you measure without a standard using a hand for instance it would be different for me then it would be for someone with a larger hand
Identify the systems of measure used by Americans most other countries and the scientific community
The English system of measurement is commonly used in the United States most other nations use the metric system a system based on multiples of 10
SI standards are universally excepted and understood by scientists worldwide
What is the unit and symbol for length
Meters
M
What is the unit and symbol for mass
Kilograms
Kg
What is the unit and symbol for time
Seconds
S