Masonry Layout

HAZARDOUS WASTE

By-products of society that can pose a substantial or potential hazard to human health or …

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HALOGENS

Reactive chemicals, such as chlorine and bromine which have many industrial uses. They are rarely …

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HALF LIFE

1 – The amount of time that is required for a radioactive substance to lose …

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HABITAT

The place where a population (e.g., human, animal, plant, micro-organism) lives and its surroundings, both …

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