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Created page with "==Key Stage 4== ===Meaning=== '''Validity''' is whether a method produces results which test the hypothesis. ===About Validity=== : A '''valid''' experiment i..."
==Key Stage 4==
===Meaning===
'''Validity''' is whether a [[method]] produces [[results]] which test the [[hypothesis]].
===About Validity===
: A '''valid''' [[experiment]] is one which tests the [[hypothesis]] posed.
: An '''invalid''' [[experiment]] would be one which does not test the [[hypothesis]].
: An [[experiment]] may be made '''invalid''' by not using [[Control Variable|control variable]]s as they may affect the [[results]] instead of the [[Independent Variable|independent variable]].
: A [[conclusion]] may also be [[valid]] or [[valid|invalid]] depending on whether the [[conclusion]] fits the [[results]] that were given.
===Examples===
====Valid Experiment====
: [[Hypothesis]] - The [[extension]] of a [[Coil Spring|spring]] is [[Directly Proportional|directly proportional]] to the [[force]] applied to the [[Coil Spring|spring]].
: Method - Attach different known [[weight]]s to the [[Coil Spring|spring]] and [[measure]] the [[extension]] of the [[Coil Spring|spring]].
====Invalid Experiment====
: [[Hypothesis]] - The [[extension]] of a [[Coil Spring|spring]] is [[Directly Proportional|directly proportional]] to the [[force]] applied to the [[Coil Spring|spring]].
: Invalid Method 1 - Attach different known [[weight]]s to an elastic band and [[measure]] the [[extension]] of the elastic band.
: Invalid Method 2 - Attach different known [[weight]]s to the [[Coil Spring|spring]] and [[measure]] the [[width]] of the [[Coil Spring|spring]].
: Invalid Method 3- Pull the [[Coil Spring|spring]] with the hands and [[measure]] the [[extension]] of the [[Coil Spring|spring]].
: Invalid Method 4 - Attach different known [[weight]]s each to a different [[Coil Spring|spring]] and [[measure]] the [[extension]] of each [[Coil Spring|spring]].
===Meaning===
'''Validity''' is whether a [[method]] produces [[results]] which test the [[hypothesis]].
===About Validity===
: A '''valid''' [[experiment]] is one which tests the [[hypothesis]] posed.
: An '''invalid''' [[experiment]] would be one which does not test the [[hypothesis]].
: An [[experiment]] may be made '''invalid''' by not using [[Control Variable|control variable]]s as they may affect the [[results]] instead of the [[Independent Variable|independent variable]].
: A [[conclusion]] may also be [[valid]] or [[valid|invalid]] depending on whether the [[conclusion]] fits the [[results]] that were given.
===Examples===
====Valid Experiment====
: [[Hypothesis]] - The [[extension]] of a [[Coil Spring|spring]] is [[Directly Proportional|directly proportional]] to the [[force]] applied to the [[Coil Spring|spring]].
: Method - Attach different known [[weight]]s to the [[Coil Spring|spring]] and [[measure]] the [[extension]] of the [[Coil Spring|spring]].
====Invalid Experiment====
: [[Hypothesis]] - The [[extension]] of a [[Coil Spring|spring]] is [[Directly Proportional|directly proportional]] to the [[force]] applied to the [[Coil Spring|spring]].
: Invalid Method 1 - Attach different known [[weight]]s to an elastic band and [[measure]] the [[extension]] of the elastic band.
: Invalid Method 2 - Attach different known [[weight]]s to the [[Coil Spring|spring]] and [[measure]] the [[width]] of the [[Coil Spring|spring]].
: Invalid Method 3- Pull the [[Coil Spring|spring]] with the hands and [[measure]] the [[extension]] of the [[Coil Spring|spring]].
: Invalid Method 4 - Attach different known [[weight]]s each to a different [[Coil Spring|spring]] and [[measure]] the [[extension]] of each [[Coil Spring|spring]].