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Concept of attraction among masses
The educational resource shows a Flash animation about the greenhouse effect The Earth is an open material system, because it interchanges matter and energy with outer space.
Concept of density. Performing calculations
Concept of attraction among masses
tudying this teaching unit will enable students to: Get to know the most fundamental properties of matter: volume and mass, as well as their units of measure. Understand the concept of density and the ...
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