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science 10-13
Kristen's science test study cards
answers | question |
---|---|
stalagtite | an iciclelike mass of dripstone that forms on the ceiling of a cave |
living fossils | animals such as the coelecanth that disappear abruptly from thfossil record, yet are still alive today |
puncutallted equilibrium hypothesis | the evolutionary hypothesis which states that new kinds of organisms arise in just a few generations as a result of massive genetic rescramings |
erosion | general term for the carrying away of rock fragments such as by wind or running water |
weathering | general term for the process by which rocks are broken down by the forces of nature |
mass waisting | general term for movements of rock and soil caused by gravity |
paleontology | the study of fossils |
sea stack | pillar like structure of rock formed when the middle of a sea arch collapses |
geological colomn | a hypothetical evolutionary time scale that pposedly charts both the earth's history and the sequence of rock layers in the earth's crust |
abrasian | the sandblasing action of windblown sand |
chymical, physical | the two types of weathering |
drainage basin | a region of land drained by a stream or river system |
meander | winding, looping curve in a river on a flat flood plain |
fossil | the preserved remains of plants, animals or humans in sedimentary rock |
ice age | the perid of history during which much of the earth's high latitudes were apparently covered with glaciers |
delta | a fan shpaed deposit of sediments at the mouth of a river |
stalagmite | a spirelike mass of drpistone that forms on the floor of a cave |
exfoliation | type of weathering often associated with granite, that involeves the breaking or peeling away of rock in layers |
drumlin | low hill formed when advancing glacier overuns an old moraine |
no transitional forms | what is the most important evidence agains evolution? |
special creation | the belief that God called the universe andall that is in it into existence out of nothing |
evolution | the belief that the universe and all that is in it originated by natural processes over bllions of years |
uniformitarianism | false beliefthat all geological processes have always proceeded at the same rate |
principle of uniformity | states tht the same scientific laws in operation today have existed throughout the earth's history |
australopitecines | the fossil known as "lucy" is an exampl of this group of extinct apes |
natural selection | the idea that the fittest and strongest of heach species ae mre likely to survie and reproduce that weakr or unfit members of the species |
Charles Darwin | the British naturalist who popularized evolution with the book on The Origin of Species |
mass | the quantity of matter an object contains |
3rd law of motion | states that for every action there is an equal and oppote reaction |
9.8 m/s | acceleration of gravity at the earth's surface |
velocity | the speed of an object in a particular direction |
Sir Issa Newtion | formulated the laws of motion and gravitation |
strong nuclear, weak nuclear, gravitational, electromagnetic | the four fundamental forces of nature |
inertia | the tendency of matter to reist changes in motion |
more slowly | according the the second law of motion, a given force would cause a heavier object to accelerate________than a lighter object |
at the same rate | Galileo discovered that without air resistance, heavier objects fall_________as lighter objects when dropped |
vector | an arrow that represents the magnitude and direction of a physical quantity of a diagram |
mechanics | the branch of physics that deals with objects in motion |
speed | the distance coered by an object in a certain period of time, rate of motion |
acceleration | any change in speed, direction, or both |
interferance | the mutual reinforcement or cancellation that occurs when wo or more waves meet |
decibel | the unit usually used to measure sound intensity in the way that reflects how our ears perceive sound |
defraction | spreading out of a wav after it passs through a narrow opening |
pitch | the ffect offrequency on the way our ear perceives sound |
constructive | when two crests or two troughs of interfering waves coincide they strengthen each other |
refraction | the being of the path of a wave as a result of a change in wave speed, such as when crossing a boundary between medium |
ultrasonic | sound with a frequency above the ranceof human hearing |
frequency | the number of complete waves that pass a given point in a second |
supersoic | speeds faster than the speed of sound |
hertz | he SI unit of frequency equal to 1 wave or cycle per second |
amplitude | the maximum distance that paricles are displaced by a wave |
law of reflection | the angle of incidence is equal to the angle of reflection |
longitudinal wave | a series of compression and rarefaction pulses traveling along a spring |
constructive, destructive | the two kinds of wave interferences |
wavelength | the distance from one wave crest or trough to the next |
overtones | sounds produced by a musical instrument at highter frequencies than the funamental |
doppler effect | a change in sound frequency caused by an object's motion |
infrasonic | sound with a frequency below the rance of human hearing |
medium | the substance through which a wave transfers energy |
wave | a periodic back and forth motion that transmits energy through a substance |
destructive interference | the wave interference that occurs when the crest of o wave and a trough of another pass through each other, canceling each other out |
reflection | the change in the course of a wave as a result of a collision with an object |
transverse waves | a series of side to side wavestraveling along a rope |
inverse square law sound intensity | a sound at a distance of 1 meter is 100 times more intence than the same sound at a distance of 10 meters |
crest | the highest point of a wave |
75 m/s | what is the speed of water wave with a wavelength of 25 feet and frequency of 3 hz? ( speed= wavelength x frequency) |