Elementary scientific english practice.

Hot metal. -- Sir walter releigh. -- Electric wire. -- Light. -- Flying. -- In a balloon. -- The nine planets. -- Eclipses. -- Switches and fuses. -- Magnets. -- Otto von guericke and the vacuum. -- Galileo. -- Pendulums. -- Earthquakes. -- Thamas Alva Edison. -- Some of the gases. -- Some Arab Scie...

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