Presenter 2: In this film, we will look at how to collect valid measurements when we carry out an experiment. Presenter 1: For example, I want to investigate the distance a car travels when the height ...

Originally published as a series of pamphlets in 1751, the first collected edition of Experiments and Observations on Electricity Made at Philadelphia in America by Benjamin Franklin was the fourth ...

A hypothesis is an idea about how something works that can be tested using experiments. A prediction says what will happen in an experiment if the hypothesis is correct. Presenter 1: We are going to ...

Franklin studied electricity and proved lightning’s electrical nature with a key and kite. Franklin made groundbreaking discoveries in his study of electricity. He wrote up his observations and ...

There is considerable debate among ecologists as to whether or not communities are saturated. In saturated communities, species richness should remain relatively constant over time, despite ...