Physical Science for ProgressPrentice-Hall, 1970 - 626 σελίδες |
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Σελίδα 3
... theory that the core of the earth is made of iron and nickel , " or " It is a fact that the earth's axis is tipped ... theories . Theories undergo changes every time new related Section 1 / MAN AND NATURE.
... theory that the core of the earth is made of iron and nickel , " or " It is a fact that the earth's axis is tipped ... theories . Theories undergo changes every time new related Section 1 / MAN AND NATURE.
Σελίδα 4
... theories to fit those facts . 3. A theory must be easily modified . Scientists rarely throw a theory away com- pletely . Rather , they modify the theory to make it useful once more . 4. A theory should be the simplest explanation that ...
... theories to fit those facts . 3. A theory must be easily modified . Scientists rarely throw a theory away com- pletely . Rather , they modify the theory to make it useful once more . 4. A theory should be the simplest explanation that ...
Σελίδα 310
... theory was the winner . This , however , did not mean the death of the particle theory . About 60 years ago Max Planck and Albert Einstein brought the particle theory back . Present day scien- tists make use of both theories . They ...
... theory was the winner . This , however , did not mean the death of the particle theory . About 60 years ago Max Planck and Albert Einstein brought the particle theory back . Present day scien- tists make use of both theories . They ...
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UNIT | 49 |
distributors of the John Frankenheimer film Grand Prix A General Electric Company 337 bottom rightGeneral Electric | 92 |
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acid acting ACTIVITY added amount atoms beam become body called carbon causes cell charges chemical chemical change circuit color combining compounds connected contains copper determined direction distance earth effort electrical electrical charges electrons elements energy engine equal experiment explain facts feet FIGURE flow force fuel gain gives glass grams happens heat hour hydrogen inch increases ions iron kinds lamp laser layer length light liquid magnet mass materials matter means measure metal miles mirror molecules moon motion move nature needed object oxygen particles piece plane plate pole position pounds pressure produced push rays reflected resistance Result rock scientists shell side sodium solution sound space speed spring stars Study surface temperature Terms theory travels tube turns units waves weight wire