Intro to Physical Science
What is the tentative explanation a scientist formulates to describe his process?
hypothesis
What unit prefix means "one thousand"?
kilo
What branch of physics addresses the effects of forces on matter?
mechanics
Which state of matter is practically unaffected by attractive forces between molecules?
gas
What is the SI unit of energy?
joule
What happens to water when it freezes?
it expancs
The SI unit of frequency is?
hertz
The additive primary colors
red, yellow, green
Interpreting data in a way that supports one's own views
bias
What is the closeness of a measurement to the quantit's actual value?
accuracy
What is the total displacement of an airplane that travels 1000. km west and then travels 600. km east?
400. km west
What is the SI unit of pressure?
pascal
Which form of energy is associated with the position of an object and the forces acting upon it?
potential energy
What term refers to liquids that evaporate rapidly?
volatile
number of waves that pass a given point per unit of time
frequency
Most powerful and penetrating electromagnetic waves
gamma rays
What branch of science is the study of interactions between matter and energy
physics
What is the proper scientific notation for the number 5793?
5.793 x 103
What is the sum of two or more vectors?
resultant
What are the two factors that affect gravitational pressure?
density and depth
What holds together the nucleus of an atom?
strong nuclear force
The most importantt component of a heat pump
refrigerant
The effect of frequency on the way the ear preceives sound is ?
pitch
electromagnetic waves sometimes called heat rays
infrared waves
To test a proposed solution to a problem, an engineer constructs a ?
prototype
How many significant digits are in 1000.10?
6
The SI unit of force is the ?
newton
What is the device that is used to measure atmospheric pressure?
barometer
What is responsible for most known forces?
electromagnetic force
What method of heat transfer does a hot-water heating system use to heat a room?
convection
The unit usually used to measure sound intensity level
decibel
Name ther phenomenon in which the colors of light depend on the viewing angle
iridescence
What are the three parts of the scientific method
observing, hypothesizing, and experimenting
What is a mathematical statement that two exrssions are equal?
equation
Any changee in velocity is called ?
acceleration
What is the general term for a structure designedd to produce lift as it moves through a fluid?
foil
What is the attractive force between all material objects?
gravitational force
What is the transfer of heat without matter?
radiation
The principle stating that the angle of incidence equals the angle of reflection is the ?
law of reflection
An image that appears to behnd a mirror is called a ? image
virtual