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43 Cards in this Set
- Front
- Back
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what is the unit for measuring electrical current?
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amps
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what is the unit for measuring electrical resistance?
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ohms
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what is the unit for measuring electrical force?
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volts
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What has the greatest density air or raindrops?
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raindrops
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What will happen to the barometer reading when rainy weather begins to stop and conditions move toward fair skies?
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it will increase
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the ____ theory states that all matter is in constant motion.
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kinetic
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_____ have a definite volume and take the shape of their container.
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liquids
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_____ have a definite volume and a definite shape
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solids
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_____ have no definite volume , no definite shape and particles moving randomly.
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gases
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_____ refers to solids that have a random distribution of the materials that compose it.
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amorphous
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_____ is a solid with a definite geometric shape; ie salt, diamond, ice.
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crystal
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refers to the pull on a material that tends to stretch or seperate it.
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tension
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occurs when an object is bent and its inner componets are pushed together.
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compression
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refers to the ability of a material to change shape but return to its original form.
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elastic
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refers to the "heaviness" of a material or its mass per unit volume.
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density
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= force per unit area
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pressure
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are the units of pressure in the English system.
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Psi
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of water determines its pressure; not its volume.
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height
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force is the upward force of a fulid on an immersed object.
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buoyant
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Principle explains relationships that exists for objects placed in a fluid.
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Archimedes
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surface ____ is the tendency of a liquid to contract at its surface.
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tension
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is an instrument used to measure air pressure.
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barometer
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is the heavy liquid used to make instruments for measuring air pressure.
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mercury
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are the common units of air pressure in an automobile tire.
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Psi
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are the common units for air pressure used in weather forecast.
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inches of Hg
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or Torr are used for measuring air pressure in a science lab.
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mm of Hg
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(Moist,Dry) air has less pressure than (Moist, Dry) air.
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Moist, Dry
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is the boiling point of water in degrees Fahrenheit.
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212
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is the boiling point of water in degrees Celsius.
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100
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(Increasing, Decreasing) the pressure above a liquid will raise its boiling point.
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Increasing
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The boiling point of water is (higher,lower) atop a mountain than it is at sea level.
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lower
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Air pressure at sea level is approximately ____ psi.
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14.7
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(True,False) Air pressure in southern Ohio is usually above 35 inches of Hg.
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False
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What's the formula for the density of a solid?
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D = mass/volume
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What's the formula for density of a liquid?
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D = mass/volume
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Whats the formula for pressure on a solid's surface?
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P = Force/Area
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What's the formula for the pressure of a liquid?
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P = Weight Density x Height
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The weight loss of an object placed in water is equal to
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the weight of water displaced
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If an object is more dense than a fluid in which it is placed, the object will
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sink
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In an object is less dense than a fluid in which it is placed, the object will
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float
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How does the kinetic theory explain liquids being able to take the shape of their container?
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Because the kinetic theory states that all objects are always in motion, and liquids rotate, which allows them to take the shape of their container.
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Explain, in terms of kinetic theory, why water will freeze when its temperature is lowered.
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It stops rotating and gets locked in place.
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Explain how insects can "skate" across the surface of liquid water.
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Because of surface tension.
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