Science and Engineering Practices
A system is...
Two or more parts working for a common function
How is speed caculated
S=D/T
What is a meduim
a substance that transmits wave energy
When one substance can be dissolved in another, it is …
soluble
What really happens in a chemical reaction?
Elements rearange
What is a system boundary and who/what decides where it is?
Set by observer
Defines the limits of the system
What is mass
How much matter is in a substance
What is heat
The transfer of thermal energy from warmer to cooler areas.
What is density and how is it calculated?
The amount of mass per unit volume.
D = (Mass ÷ Volume)
What is a compound
two or more different types of elements that are chemically combined
What are the three criteria for a good material list
Bulleted
Amount Given
Complete
What is Kinetic energy
What is temperature
A measurement of the average kinetic energy in a substance.
What measurements does all matter have (two)
Mass and Volume
What happens to waves when they are absorbed?
They transfer to thermal energy
What are the four parts of an analysis?
P atterns or trends
O utliers or unusual events
P ossible variables that were not controlled
L imitations of the experiment
What are the four non-contact forces
Magnetic
Electrostatic
Gravity
Electromagnetic
What types of waves need a medium to move through and which ones do not?
Sound waves need a medium
Electromagnetic (light) waves do not
How many electrons are elements seeking to have in their outer energy level to become stable?
2 - if there is only one energy level
8 – on every other outer energy level
Three systems of a triple bottom line
Environmental Stewardship (Planet)
Social Equity (People)
Economic prosperity (Profit)
What are the four criteria for a good data table or graph
Title
Proper Variables
Units of measurement
Correct format
What is Newtons 1st law of motion
An object will maintain its motion unless acted on by an unbalanced force
What is a wavelength in each of the types of waves?
Transverse wave:
Crest to crest or trough to trough
Longitudinal wave:
Compression to compression
What really happens in a chemical reaction?
Elements rearange
Describe a synthetic substance
•A substance not found in nature
•Made by people using scientific processes