Physical Science Course Vocab
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20 Terms
science
The systematic study of the world that produces observations, inferences, and models, including the products that it creates through this systematic study
physical science
The study of nonliving matter and energy
chemistry
The study of the composition, structure, and properties of matter, and the changes that take place in matter
physics
The study of matter and energy and the interactions between them
the Creation Mandate
God’s command that directs us to exercise wise and good dominion over His creation to the glory of God and to the benefit of fellow humans
model
A workable explanation or description of a phenomenon, either physical, conceptual, or mathematical
theory
A model that explains a related set of phenomena, used to predict unobserved aspects of the phenomena
law
A model, often written as an equation, that describes phenomena under certain conditions, but does not attempt to explain it
hypothesis
An initial, testable explanation of a phenomenon that stimulates and guides the scientific investigation
accuracy
The comparison of a measurement to an acceptable or expected value
precision
The degree of exactness of a measurement; can indicate the closeness or repeatability of measurements
distance
How far an object moves during a time interval
displacement
A vector quantity that describes a change in position
vector
A measurable quantity with both magnitude and direction
scalar
A measurable quantity that consists of magnitude (size) only
speed
A scalar quantity indicating the rate at which an object moves (95 kph)
velocity
A vector quantity indicating the rate at which an object’s position changes (2.3 m/s to the east)
Formulas:
Speed formula
Velocity formula
Momentum formula
Acceleration formula
Distance formula
Speed = distance / time
Velocity = displacement ÷ time
Momentum = mass in kilograms x velocity in meters per second (p = mv)
Acceleration = final velocity - minus initial velocity / elapse of time
Distance = ½ x acceleration x time2
momentum
A property of a moving system that is equal to its velocity times its mass. (2,270,000 kg m/s east)
acceleration
The rate of change in velocity. (9.0 m/s2 to the east) (9.8 m/s2 for gravity on earth)
Note 
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