Physical Science Test #1 - Melinda Huff
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40 Terms
Hypothesis
an educated guess, a reasonable explanation
Pseudosience
fake science that pretends to be real science
Acceleration
the rate at which velocity changes with time; the change in velocity may be in magnitude or direction or both
Speed
distance travelled per unit time
Velocity
the speed of an object and specification of its direction of motion
Force
a push or pull
Weight
the force upon an object due to gravity
Mass
the quantity of matter in an object
Net Force
the combination of all forces that act on an object
Inertia
the property by which objects resist changes in motion
Friction
the resistive force that opposes the motion or attempted motion of an object past another object with which it is contact, or through at fluid
Newton
the scientific unit of force
Free Fall
falling under the influence of gravity alone or with out air resistance
Density
the amount of matter per unit volume
Scientific Method
1. observe
2. propose an explanation
3. use explanation for prediction
4. test the experiments
5. modify explanation as needed
6. make prediction based on your modified explanation
7. publish
Experiment
recreation of an event or occurrence to test a hypothesis
Scientific Law
hypothesis that have gone through rigorous testing and have not been proven wrong
Scientific Theory
broadly based set of working hypothesis
Model
collection of theories or ideas intended to represent a physical system
Objects
things that can be seen or touched
Properties
qualities or attributes characteristic of an object
Referents
comparative properties in other, more familiar objects
Measurement
uses quantitive referents
Equations
mathematical relationships between properties
Conversion
to determine what the value of a measurement in a different unit
Control Group
fixed set for comparison
Experimental Group
differs from control group by one influencing factor
Thermohaline Circulation
ocean circulation due to differences in density due to differences in temperature and salinity
1 inch
2.54 cm
1000 g
1 kg
100 cm
1 m
1000 m
1 km
100 cg
1 g
100 cL
1 L
1000 mL
1 L
1000mm
1 m
1000 mg
1 g
10^6 um
1 m
10^6 ug
1 g
10^uL
1 L
Note 
Flashcards (44)