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Class Clips

Secondary Science : How Science Works

Clip description		Keywords
	Accurate measurement of weight Duration: 02:39 How do errors occur when substances are weighed and what can affect measurement accuracy?	investigation, measurement, accuracy, scale, accurate measurement, parallax error

	An introduction to controlled experiments Duration: 02:50 The application of a controlled experiment seen through the demolition of a building.	variables, controlled experiment, demolition

	Controlling variables - standardised testing Duration: 03:20 An investigation into quality control and standardised testing in a clothing factory.	variables, standardised testing, quality control

	Controlling variables to conduct a fair test Duration: 03:24 Controlling variables in a fair test by analysing the performance of two bikes.	variables, control, fair test

	Estimating measurements Duration: 04:26 Four people are asked to estimate a number of measurements such as weight, time, distance and temperature. How can we make more accurate estimates?	investigation, measurement, estimation, measurement, estimated measurement, scale

	Experimental design - the effect of warming-up exercises on flexibility Duration: 04:05 An experiment demonstrating why a large sample size and a control group are important factors in achieving a meaningful experimental result.	bio-variables, variables, control group, sample size, experimental group, average, fitness

	Identifying and controlling variables Duration: 02:45 Identifying and controlling the variables involved in boiling water in different types of containers.	variables, identify, control, fair test

	Identifying variables Duration: 00:42 Explains how to identify and select variables using the example of boiling water in different containers.	variables, identify, select, fair test

	Identifying variables - temperature Duration: 01:38 Temperature is plotted on a time graph to compare boiling times in two different beakers.	variables, temperature, time graph, fair test

	Introduction to experimental variables Duration: 02:14 A discussion to introduce the variables which affect experiments on living organisms.	bio-variables, variables, experiment

	Introduction to variables Duration: 02:11 A discussion to introduce the variables that affect living organisms.	bio-variables, variables

	Making precise measurements Duration: 04:58 An introduction to measurement precision. Precise and accurate measurement is sometimes required - for example, when measuring a sprinter's time and starting reaction.	investigation, measurement, accuracy, scale, precise measurement

	Microscopy An explanation of the functions of light and electron microscopes with images from each type.	microscope, microscopy, magnification, electron microscope, transmission electron microscope, scanning electron microscope, tunnelling electron microscope, BitesizeScience

	The history of measurement Duration: 01:29 An introduction to the history of measurement.	introduction, measurement, universal standard, scale

	Variables under investigation - boiling water Duration: 00:45 Which variables affect boiling time? Different beakers are used to boil water.	variables, control, boiling water

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Secondary Science : How Science Works

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