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30 Cards in this Set
- Front
- Back
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atronomers divinde the sjy into ?
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constellations
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what is the term for the speed of gas molecules?
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tempetures
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why do astronmers often place telelscopes of mountain tops?
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drier atmosphere.. thinner air and less polution
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who was the first scientist to sucesfully use a telelscope to observe the night sky?
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gallaoe
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he was the first to publish a thery that eventuaully revolutionized astronomy, that the sun is the middle of the unioversoand the planets orbit the sun
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coprenicus
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the lenght of the day is based on
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rotation
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he explained why moons orbit the planents--gravity
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newton
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wat r nebulas?
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interstellar clouds of dust and gas
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wat statement bst describes gravity?
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gravity is stronger when the objects are closer together
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he incorrectly theorized the motion of the planents the best of his time.
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ptolomy
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the ___ is the imaginary point point in the sky directly above the obsever
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zenith
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if 2 stars are differeent colors, you can iner that they have different __
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tempetures
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which process releases the most energy?
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nuclear fusion
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if u break a pencil in half.. its representing wat?
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physical change
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wat is matter
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anything with volume and mass
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to measure water correctly u have to read the scale on a graduated cylindar at the ___ point of a miniscus
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lowest
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gravity affects an objects ____
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weight
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wat is inertia?
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tendancy of all object to resist change in motion
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the SI unit of force is the _____
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newton
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the amount of space takan up in an object is the ??
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mass
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describe the particles of liqued
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closly pact but still allow each other to slide past one and other
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give an example of an exothermic change
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melting ice to water
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wat does viscous mean?
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liquid resistance to flow
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describe an amorphous solid
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so particular pattern
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wat is an example of endothermic change
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energy being take-in in
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a surface forms sperical drops labeled?
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surface tension
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according to charles law, if u were to put an inflated balloon in a freezer for ten minutes wat would happen?
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it would shrink or deflate
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name the 4 most familiar states of matter
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solid liquid gas plasma
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3 catagories of elements are
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metals, metalloids , nonmetals
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the the periodic table elements are classified as
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metal non metal and metalloids
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