It is ______ that there are only 30,000 to 50,000 Asian elephants left in the world. a) periodperiodb) vesselsvesselsc) valuablevaluabled) estimatedestimated

estimated – verb – judged or calculated, as of the value, quality, extent, size, or cost of something

The 19th century was a _______ of railroad building. a) documenting documenting b) estimatedestimatedc) periodperiodd) vessels vessels

period – noun – a length of historical time

The ocean liner known as the Titanic was larger than all other oceangoing _____ of the time. a) periodperiodb) vessels vesselsc) valuablevaluable d) documenting documenting

vessels – plural noun – ships or large boats used to transport or carry over water

The excavation gave us some ______ new information about the settlers. a) valuablevaluable b) documenting documenting c) estimated estimatedd) period period

valuable – adjective – of great use, worth, or importance

The scientists took notes ______ their findings. a) vesselsvesselsb) valuablevaluable c) documenting documenting d) estimatedestimated

documenting – verb – making a record or collecting information.

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