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| the height of an average person |
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| the process of comparing a property of an object to a well defined and agreed upon referent |
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| measure in the metric system defined by using an object for a refernt |
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| one gram of water has a volume of about 1___? |
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| measurment info used to describe something |
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| how much matter an object occupies |
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| the property of volume is a measure of... |
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1. describe a property
2. define a concept
3. describe how quantities change together |
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| accurate, specific, reliable |
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| Investigations provide_____data that are used to develop and test explanations. |
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| a quantity of 5m/s is a measure of... |
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| As the volume of a cube becomes larger and larger, the surface area to volume ratio... |
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| a number and a name for the unit |
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| measurements are always reported with |
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| Quantities that can have different values at different times |
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| Involves a change in position of an object and a passage of time |
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| at the same time as the lighter object |
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| a heavy object and a light object are dropped from rest at the same time in a vacuum. the heavier object will reach the ground... |
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| change of position and passage of time |
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| Which pair of variables defines motion? |
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| speed, velocity, and acceleration of motion can be described by measuring... |
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| the rate at which velcity changes |
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| feature of motion described by acceleration |
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| the tendency of an object to remain at rest or in motion |
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1.remain at rest if initially at rest
2.continue moving in a str8 line |
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| If the forces of an object are balanced the object will... |
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| Acceleration is inversly proportional to mass. |
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| Newton's second law of motion |
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| 1. the object speeds up 2. the object slows down 3. the object changes direction |
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| An object has been subjected to an unbalanced force |
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| the product of mass and velocity is large for an object with a large momentum. |
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| the unit of weight in the metric system |
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| potential energy, work, kinetic energy |
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| Joule is a the unit of... |
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| the rate at which work is done, the rate at which energy is expended, work per unit time |
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| Equivalent to one horsepower |
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| the product of a force and the distance an object moves as a result of the force |
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| statistical test on the results of an experiment show a cause and effect relationship each time the experiment is repeated. these results are said to be... |
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| which quantity has the greatest influence on the amount of kinetic energy that a large truck has while moving down the highway |
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| Not a fundamental property |
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| the operation of which form of what device involves a single change of one form of energy to another |
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| ingnoring the air resistance the velocity of a falling object... |
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| most energy comes to and leaves earth in the form of |
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| the most widely used source of energy today |
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| coal, wind energy, biomass |
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| sources of energy that originate from the sun |
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| potential energy and kinetic energy |
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| substantially less used energy source |
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| a property that cannot be defined in simpler terms than to describe how it is measured |
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| examples of fundamental properties |
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| relation of mass and volume of a substance |
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| tentative thought or experiment derived explanation |
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| the change of velocity per unit time |
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| refers to the attractive forces between the unlike molecules |
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| refers to the attractive forces between the same types of molecules |
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| the temperature scale based on a definition of zero |
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| A measure of the average kinetic energy of the molecules in that substance |
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| Scientifically define temperature |
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| how hot or cold something is |
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| define temperature in layman terms |
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| what is the freezing point of water on the absolute temperature scale? |
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| the heat transfer that takes place by energy moving directly from molecule to molecule |
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| Heat transfer that does not require matter |
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| contains many tiny pockets of air |
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| Styrofoam is good insulating material because it... |
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| absorbs heat while remaining at a constant temperature |
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| As a solid undergoes a phase change to a liquid state, it... |
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| The condensation of water vapor actually... |
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| Compared to cooler, warm air can hold |
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| Sand has less specific heat than water |
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| Sand and water on the beach are exposed to the same radiation(sunlight)but sand is hotter than sand, why? |
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| the time required for a vibrating object to complete one full cycle |
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| Unit of cycles per seconds |
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| the period of an object is related to the frequency because they are... |
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| back and forth in the same direction |
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| a longitudinal mechanical wave causes particles of a material to move... |
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| What will tranverse mechanical waves only move through? |
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| What will longitudinal mechanical waves only move through |
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| the characteristic of a wave that is responsible for what you interpret as pitch is the wave... |
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| The number of cycles that a vibrating tuning fork experiences each second is related to the resulting sound wave characteristic of... |
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| solids compared to liquids, liquids compared to gases, warm air compared to cool air |
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| Sound waves travel faster in... |
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| Sound inference is necessary to produce the pheneomenon known as... |
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| The efficient transfer of energy that takes place at a natural frequency |
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| after the plane has passed by |
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| When will an observer on the ground hear a sonic boom from an airplane traveling faster than the speed of sound |
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| neagtively charged object |
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| An object that requires an excess of electrons becomes a... |
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| What is most likely to acquire an electrostatic charge? |
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| A quantity electric charge is measured in a unit called a... |
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| The unit that describes the potential difference that occurs when a certain amount of work is used to move a certain quantity of cahrge is called the... |
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| measures an electric current |
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| In an electric current the elctrons are moving... |
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| If you multiply amps and resistance the answer will in units of... |
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| more electrical ressitance |
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| compared to a thick wire, a thin wire of the same length, material, and temperature has |
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| the bending of a wave at the boundary between two media |
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| destructive interference occurs |
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| When the trough of one wave arrives at the same time and place as the crest of otherwise identical wave |
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| the range of normal human hearing |
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| the size of current in a conductor depends on the______as well as the voltage |
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| unit that is a measure of rate |
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| shorter wavelength, higher frequency radiation |
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| An object is hot enough to emit dull red glow. When this object is heated even, it will emit... |
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| what is the difference in the light emitted from a candle, an incandescent bulb, and the sun |
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| before it travels throught the earth's atmoosphere, sunlight is mostly... |
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| the ratio of the speed of light in a vacuum to the speed of light in some transperent materials |
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| wavelength, frequency, energy |
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| any part of the electromagnetic spectrum, including the colors of visible light, can be measured in units of... |
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| each wavelength of light has its own index of refraction |
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| A prism seperates the colors of sunlight into a spectrum because... |
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| What can only be explained by a wave model of light? |
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| The polarization behavior of light is best explained by considering light to be... |
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| What has wavelengths shorter than visble light wavelengths, more penetrating than visiblelight, and causes damage to the human skin? |
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| the same angle as the incident ray as measured |
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| According to the law of reflection, from what angle is light coming after it is reflected from a mirror? |
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| a virtual image whose rays originate at the person. |
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| When a person sees themselves in the mirror what do their eyes observe? |
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| the electron was discovered through experiment with electricity. |
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| jumping from one allowed orbital to another |
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| an electron gains or loses electrons by |
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| how many quantum nubers does the quantum mechanics model use to describe the energy state of an electron |
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| an electron in the second main energy level and the second sublevel is described by the symbol |
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| the space in which it is probable that an electron will be found is described by an |
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| the atomic number identifies the total number of |
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| each period ends with the filling of an orbital in an outer energy level |
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| number of electrons in its outer energy levels |
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| the chemical properties of an element are determined by |
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| six occupied energy levels in its atom |
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| an element in the family VIA has |
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| Alkali metals are members of group IA |
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| the number of electrons in the outer energy level |
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| indicated by the number of dots in the electron dot notation |
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| Occur between atoms from adjacent sides of the periodic table(metal and nonmetals) |
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| a color change, a change in temperature, the production of a gas |
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| What is evidence of a chemical reaction? |
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| What are generally white crystalline solids? |
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