Memory Game Resources VocabularyOnline version Match the word with the definition by Jennifer Gerber natural hazard natural resource a resource that once used cannot be replaced in a reasonable amount of time. materials found in nature that people and other living things use waste products that damage an ecosystem any material that can be used to satisfy a need an earth process that threatens to harm people and property resource renewable resource nonrenewable resource a resource that can be replaced within a reasonable amount of time. pollution