Clip description Keywords
Accurate measurement of weight
Accurate measurement of weight

Duration: 02:39

How do errors occur when substances are weighed and what can affect measurement accuracy?

 
An introduction to controlled experiments
An introduction to controlled experiments

Duration: 02:50

The application of a controlled experiment seen through the demolition of a building.

 
Controlling variables - standardised testing
Controlling variables - standardised testing

Duration: 03:20

An investigation into quality control and standardised testing in a clothing factory.

 
Controlling variables to conduct a fair test
Controlling variables to conduct a fair test

Duration: 03:24

Controlling variables in a fair test by analysing the performance of two bikes.

 
Estimating measurements
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?

 
Experimental design - the effect of warming-up exercises on flexibility
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.

 
Identifying and controlling variables
Identifying and controlling variables

Duration: 02:45

Identifying and controlling the variables involved in boiling water in different types of containers.

 
Identifying variables
Identifying variables

Duration: 00:42

Explains how to identify and select variables using the example of boiling water in different containers.

 
Identifying variables -  temperature
Identifying variables - temperature

Duration: 01:38

Temperature is plotted on a time graph to compare boiling times in two different beakers.

 
Introduction to experimental variables
Introduction to experimental variables

Duration: 02:14

A discussion to introduce the variables which affect experiments on living organisms.

 
Introduction to variables
Introduction to variables

Duration: 02:11

A discussion to introduce the variables that affect living organisms.

 
Making precise measurements
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.

 
Microscopy
Microscopy

An explanation of the functions of light and electron microscopes with images from each type.

 
The history of measurement
The history of measurement

Duration: 01:29

An introduction to the history of measurement.

 
Variables under investigation - boiling water
Variables under investigation - boiling water

Duration: 00:45

Which variables affect boiling time? Different beakers are used to boil water.

 

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