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45 Cards in this Set

  • Front
  • Back
One way to increase acceleration is by ______________
decreasing mass
factors that are controlled in an experiment
variables
what happens when generators are spun by turbines
they produce elctricity
operational definition
a statement that describes how to measure a particular variable or define a particular term
_______________________ has kinetic energy
a rolling bowling ball
hypothesis
possible explanation for a set of observations or answers to a scientific question
kinetic energy
the energy associated with motion
manipulated variable
if you purposely change the temperature to test a hypothesis, the temperature is the _________________
Niagara Falls
an example of potential energy being converted into kinetic energy
an object's mechanical energy is calculated by _______
adding its kinetic and potential energies
elastic potential energy
what a pole-vaulter first converts kinetic energy into
graph
a tool that may help a scientist interpret data by revealing unexpected patterns
nuclear energy
energy stored in the nucleus of an atom
when two forces act in the same direction, they _______
add together
communicating
the stage of the scientific process enables a scientist to check the work of other scientists
qualitative observations
observations that deal with descriptions that cannot be expressed in numbers
the responding variable
dependent variable
an example of a chemical change
burning wood
vaporization
a liquid becoming a gas
when scientists create a representation if a complex process, they are ____________________
making models
free fall
when the only force acting on a falling object is gravity
solid
the state of matter in which the particles are packed tightly together in a fixed position
theory
a well-tested explanation for a wide range of observations or experimental results
power
the rate at which energy is transformed
observing
using one or more of your senses to gather information
moving water can be used to produce electricity because ________________________________
most forms of energy can be converted into other forms
combustion
the process of burning a fuel
a match
an example of something that stores chemical energy
scientific inquiry
an example would be trying to explain a solar eclipse
gravitational potential energy
potential energy that depends on height
matter
anything that has a mass and takes up space
solid
a state of matter that has definite volume and definite shape
centripetal force
any force that causes an object to move in a circle
inertia
the tendency of an object to resist changes in its motion
cost is an example of a constraint in designing a product
true
brainstorms is used to test the operation of a product
false
to research a problem with an existing product, engineers may conduct tests to gather information about it
true
a knowledge of physical science is essential in many different careers, such as those of a firefighter, photographer, of sound technician
true
technology is a way of learning about the natural world by gathering information
false
Once a product is ready to be sold, engineers must explain their ideas to people who will bring the product to consumers
true
engineers are trained to use both technological and scientific knowledge to solve practical problems
true
technology has no impact on society
false
inferences ate the facts, figures, and other evidence gathered through observations
false
a scientific law is a well-tested explanation for a wide range of observations or experimental results
false
electron
a particle that carries a negative charge