What is light made of? Why is the sky blue?
Rainbow over Amazon river - What is light made of? What is light made of? Light is made of billions of tiny particles called photons. These photons travel from one place [...]
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08, 2017
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06, 2017
What is oxygen? Atoms, elements, chemistry
Diagram of an oxygen atom When a star has changed all of its hydrogen atoms into helium, it turns into a red giant and moves on to convert the helium atoms into [...]
