2023 BECE Questions & Answers (INTEGRATED SCIENCE) SierraLeone

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NUMBER 1

i) valency" refers to the combining capacity of an atom, element, or ion. It is the number of electrons that an atom can gain, lose, or share when it forms chemical bonds with other atoms in a compound.

i) Pollution refers to the introduction of harmful substances or contaminants into the natural environment, causing adverse effects on living organisms, ecosystems, and the overall balance of the ecosystem

NUMBER 1b 

LIST FOUR FORMS OF ENERGY

A Kinetic Energy

B Potential Energy 

C Electrical Energy 

D Heat ( Thermal Energy)





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