Save guides, add subjects and pick up where you left off with your BBC account. A secondary source is information written about an experiment, discovery, or topic that someone else investigated.

Students will list and share what they have written ... Have students locate, draw or orally suggest an example of a secondary source for this historical era. 1. Students can distinguish between ...

OPEC had already dropped in 2022 the International Energy Agency (IEA) from its list of secondary sources after the Paris-based agency embarked on a campaign to criticize oil-producing countries ...

Molly: I suppose you could always visit the moon. Narrator: Or you could research secondary sources instead as other people may already have found the answer. Some things are difficult to research ...