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