Unit 1 Flashcards
What does a meter stick measure
Length in meters
What does a balance measure
Mass in grams
What does a thermometer measure
Temperature in degrees Celsius
What is the SI units
Kelvins
What does a spring scale measure
Force or weight in newtons
What does a spectrometer measure
Electromagnetic spectrums(makes rainbows)
What does a psychrometer measure
Humidity %
What do you call the curve and the graduated cylinder with water
The meniscus
How do you read the volume from the bottom of the curve
Always read at bottom of curve
Define density
Amount of matter in a given object/volume
What is in the triangle thing
M
D V
Define scientific model
A representation of an object or system
Name one example of a scientific model
Plastic fruit that looks real but does not taste real
Define physical models and give an example
They look like the things they represent
Ex: Barbie doll
Define a mathematical model and give an example
Used to predict something using symbols
Ex: weather map
What is the formula for speed
Speed equals distance divided by time
What is the formula for density
D equals M divided by V. Remember heart in half
Define conceptual models and give an example
A model of an idea or theory
Ex: Big Bang theory of a blueprint of a building
How are models used
To represent something very large or very small: and to help illustrate or explain a theory
Define scientific law
A summary of many experimental results and observations
When does a theory become a law
When it correctly projects the result of many experiments
Define Theory
Proven through research
What is the order to the scientific method(8)
- Observation
- Purpose/question/problem
- Research
- Hypothesis
- Experiment
- Organize data/analysis
- Conclusion
- Share results
Define observation
Any use of senses to gather information
Define hypothesis
A possible explanation or answer to a question
Define a controlled experiment
Compares the results from a controlled with the results from one or more experimental groups
Define data
They are pieces of information acquired through experimentation
Define organizing data
When you organize data into charts or graphs to help make the relationship between information easier to see
Define a conclusion
Oh conclusion must refer back to your hypothesis and they also guide what you do next
What is the independent variable
Changed in an experiment
What is the dependent variable
Result from the independent variable
What does a graduated cylinder measure
Volume(milliliters)
Define accuracy
How close a measurement is the true value
Define precision
How close the measurements are to each other
What are qualitative measurement
Words such as heavy or hot
What are quantitative words
Measurements that involve numbers
Significant figures in a measurement include
All of the digits that are known plus one more digit that is estimated
Descriptive investigation and an example
Describe something
Ex weather
Comparative investigation an example
When you compare two or more things or compare one thing as it changes over time Ex One class to another
Experimental investigation and one example
When you add a variable
Ex adding weight to a chair
